Seat No -
Total number of questions : 60
1000499 T1 ENGINEERING PHYSICS
Time : 1hr
Max Marks : 50
N.B
1) All questions are Multiple Choice Questions having single correct option.
2) Attempt any 50 questions out of 60.
3) Use of calculator is allowed.
4) Each question carries 1 Mark.
5) Specially abled students are allowed 20 minutes extra for examination.
6) Do not use pencils to darken answer.
7) Use only black/blue ball point pen to darken the appropriate circle.
8) No change will be allowed once the answer is marked on OMR Sheet.
9) Rough work shall not be done on OMR sheet or on question paper.
10) Darken ONLY ONE CIRCLE for each answer.
Q.no 1. If the material is reduced to nano size then properties of those materials _____________ from those of the bulk material
A : slightly differ
B : drastically differ
C : remain same
D : can’t say
Q.no 2. If ne & nh are the number of electrons & holes in a semiconductor heavily doped with phosphorus, then
A : ne»nh
B : ne <nh
C : ne«nh
D : ne =nh
Q.no 3. What happens to O-ray and E-ray if they travel along the optic axis?
A : E-ray travels faster than O-ray
B : O-ray travels faster than E-ray
C : Both ray travels with same velocity
D : None of the above
Q.no 4. Plane polarized light has vibrations
A : In one direction perpendicular to direction of propagation
B : Along the direction of propagation
C : In two directions perpendicular to direction of propagation
D : In all directions perpendicular to direction of propagation
Q.no 5. Ultrasonic waves are produced by
A : piezoelectric effect
B : Doppler effect
C : Peltier effect
D : magneto-optic effect
Q.no 6. The expression for the thickness of a half-wave plate of positive crystal is
A : t = λ / (μe - μo )
B : t = λ / 2(μe - μo )
C : t = λ / 3(μe - μo )
D : t = λ /2 (μo – μe )
Q.no 7. The walls of the hall built for music concerns should
A : Amplify sound
B : Reflect sound
C : Transmit sound
D : D Absorb sound
Q.no 8. When the light is incident at the polarizing angle, which of the following is completely polarized?
A : reflected light
B : refracted light
C : both reflected as well as refracted light
D : neither reflected nor refracted light
Q.no 9. The phenomena of the echo is used to measure the
A : length of metal
B : flaws in metal
C : transfer signals
D : none
Q.no 10. Effective path difference between two successive reflected rays by thin parallel film is
A : 2μtcosr+ λ/2
B : 0
C : 2μtcosr
D : 2μtcosr+n λ
Q.no 11. piezoelectric effect has been observed in
A : nickel
B : glass
C : quartz
D : mica
Q.no 12. For an infinitely deep 1 dimentional potential well, a quantum particle in the ground state is likely to be found
A : at one corner of the well
B : At 1/4th and 3/4th distance from one end of the well
C : At every point in the well with equal probability
D : At the center of the well
Q.no 13. Sound waves of frequency less than 20 Hz are called
A : longitudinal wave
B : ultrasonic wave
C : Infrasonic waves
D : mechanical wave
Q.no 14. Current once initiated in a superconducting ring can continue to flow infinitely without any power losses
Is called
Is called
A : Infinite current
B : Critical current
C : Persistent current
D : induced current
Q.no 15. The temperature at which conductivity of material becomes infinite is called.
A : Critical temperature
B : absolute temperature
C : Mean temperature
D : Crystallization temperature
Q.no 16. According to the Malu’s law, the intensity of polarized light emerging through the analyzer varies as
A : I =Iₒ cosθ
B : I =Iₒ/cos2θ
C : I =Iₒ / cos²θ
D : I =Iₒ cos²θ
Q.no 17. Depletion layer consists of
A : electrons
B : mobile ions
C : protons.
D : immobile ions
Q.no 18. When the size of the material is reduced to size in nano region, the energy band structure undergo______________which mainly accounts for the change in the properties of nanoparticles
A : Small variations
B : large variations
C : Splitting
D : scattering
Q.no 19. When the size of the material reduces, the surface area to volume ratio ________
A : decreases
B : Increases
C : remains same
D : becomes exactly equal to the volume
Q.no 20. The intensity level expressed in a unit
A : bel
B : 10-12W/m2
C : Newton
D : db/m
Q.no 21. For the Solar cell the ratio of maximum power delivered to ideal power is called as
A : Efficiency
B : Fill factor
C : short-circuit
D : Open-circuit
Q.no 22. In Fraunhoffer diffraction distance of slit from source and screen is
A : finite
B : infinite
C : parallel
D : not equal
Q.no 23. In case of ruby laser, optical resonator cavity is formed by the silvered ends of
A : Ruby crystal
B : The Calcium crystal
C : Tourmaline crystal
D : Quartz crystal
Q.no 24. Bending of light around the straight edge of obstacle and spreading into its geometrical shadow is called as
A : Diffraction
B : Interference
C : Polarization
D : Dispersion
Q.no 25. The superconducting State is perfectly _ _ _ _ _ in nature.
A : Diamagnetic
B : Paramagnetic
C : Ferromagnetic
D : All above
Q.no 26. In Newton’s ring experiment if the air film is replaced by water film, then the diameter of the ring
A : Decreases
B : Increases
C : Remains same
D : None of the above
Q.no 27. Which of the following will remain unchanged when a sound wave travels in air or in water?
A : Amplitude
B : frequency
C : wavelength
D : Speed
Q.no 28. Pumping process used in diode laser is
A : optical pumping
B : forward biased voltage
C : electrical discharge
D : none of these
Q.no 29. Laevo-rotatory optically active substance rotates the plane of vibrations
A : In clockwise direction
B : In left hand side
C : By 1800
D : None of the above
Q.no 30. _ _ _ _ _ superconductor is completely diamagnetic
A : Type - l
B : Type - ll
C : both
D : none of the above
Q.no 31. On reverse biasing the P-N junction,its depletion region becomes
A : narrow
B : zero
C : broad
D : constant
Q.no 32. Reverberation time T of a hall varies is inversely proportional as the
A : density
B : degree of sensation
C : effective area
D : square of amplitude
Q.no 33. A path difference of 3λ/2 between the two waves corresponds to the phase difference
A : 3π/2
B : π/3
C : 3π
D : 2π/3
Q.no 34. Laser action is possible only if there is
A : a set of reflecting mirrors
B : a black body
C : population inversion
D : oscillations of laser source
Q.no 35. Superconductivity was first observed by
A : Volta
B : Meissner
C : Kamerling Onnes
D : Schrieffer
Q.no 36. The speed of sound in medium depends upon
A : Amplitude
B : frequency
C : wavelength
D : properties of the medium
Q.no 37. The characteristics of laser beam are
A : Highly directional
B : Highly intense
C : Highly monochromatic
D : All of these
Q.no 38. To check the optical flatness of the surface in wedge-shape thin film fringe-width must be
A : Equal, straight
B : Unequal, straight
C : Unequal, curved
D : Equal, curved
Q.no 39. The active medium of a helium-neon laser is made up with ________ ratio of helium-neon.
A : 10:1
B : 10:3
C : 10:5
D : 10:6
Q.no 40. For the wavefunction to be true or acceptable, the following conditions are to be followed by it
A : Continuous
B : Finite
C : Normalizable
D : All of these
Q.no 41. According to de Broglie hypothesis
A : A particle in rest has matter waves associated with it
B : A particle at rest or in motion has matter wave associated with it
C : A particle in motion has matter wave associated with it
D : All above statements are correct
Q.no 42. Loudness of sound is found to be proportional to the
A : log 10 L
B : log 10 I
C : area
D : log 10 s
Q.no 43. Sound travel in the form of
A : longitudinal
B : transverse
C : mechanical
D : Infrasonic waves
Q.no 44. Heisenberg Uncertainty Principle is significant for subatomic particles because
A : Their energy is small
B : They show wave particle duality
C : Their velocity is small
D : They show photoelectric effect
Q.no 45. The normalization condition indicates that probabilities of finding the particle
A : in a small volume summed up over the entire space must give 1
B : in a small volume must give 1
C : in a small volume summed up along the positive direction must give 1
D : in a small volume summed up along the negative direction must give 1
Q.no 46. Intensity of diffraction at an angle ѳ for fraunhoffer diffraction by grating is given by Iѳ
A : (sinNβ/ sinβ)
B : (sinβ)2
C : (sinα/α)2
D : Im(sinα/α)2 (sinNβ/ sinβ)2
Q.no 47. The Cooper pairs are electron pairs with
A : equal and same momentum
B : Unequal & same spin
C : Equal and opposite momentum and spin
D : Unequal & opposite spin and momentum
Q.no 48. Fringe width is defined as the distance between two consecutive
A : Crests
B : Bright fringes only
C : Dark fringes only
D : Bright or dark fringes
Q.no 49. The minimum amount of current passed through the body of superconducter in order of destroy the superconductivity is called.
A : induced current
B : Critical current
C : Eddy current
D : super current
Q.no 50. ln Magnetostriction Oscillator
A : a copper rod is used
B : a nickel rod is used
C : a magnesium rod is used
D : an aluminium rod is used
Q.no 51. In an N-type semiconductor, donor level is
A : above the conduction band of the host
B : close to the conduction band of the host
C : close to the valence band of the host crystal.
D : below to the valence band of the host crystal
Q.no 52. According to de Broglie hypothesis equation λ=h/p is applicable for
A : Matter particle only
B : Photons only
C : Both matter particle and photon
D : All options are correct
Q.no 53. We prefer Polaroid sunglasses because they
A : have soothing colours
B : reduce the intensity of light
C : are cheaper
D : can change colour
Q.no 54. Wave function Ψ represents
A : Potential energy of particles producing matter waves
B : Oscillations of quantity that produces matter waves
C : Momentum of particles that produces matter waves
D : Kinetic energy of particles producing matter waves
Q.no 55. The current in a superconductor produces
A : zero, voltage drop across it
B : a strong, electric field around it
C : a small voltage drop across it
D : a large voltage drop across it
Q.no 56. Heisenberg Uncertainty Principle is not significant for daily life objects because
A : The value of Planck's constant is insignificant for these particles
B : It is difficult to observe wave particle duality in daily life objects
C : Daily life objects are macroscopic
D : All of these
Q.no 57. The basic principle of holography is
A : to create the interference pattern of object wave only
B : to create the interference pattern of reference wave only
C : to create the interference pattern of object wave and reference wave
D : none of the above
Q.no 58. An echo is heard when direct sound waves coming from the source and its reflected wave reach the listener with a time interval of about
A : 1/14 seconds
B : 1/3 seconds
C : 1/7 seconds
D : 1/19 seconds
Q.no 59. The reverberation time is the time required for the intensity to drop by
A : 30dB
B : 90dB
C : C 60dB
D : 120dB
Q.no 60. The concept of wave function is insufficient to tell about probability of particle because
A : Wave function is negative at places of negative amplitude. Thus probability would come out to be negative which is meaningless.
B : Wave function is not single valued
C : Wave function is continuous. Ψ could have been considered as the sufficient function if it had been discontinuous.
D : Wave function directlty gives the uncertainty in position and not the probability.
Answer for Question No 1. is b
Answer for Question No 2. is a
Answer for Question No 3. is c
Answer for Question No 4. is a
Answer for Question No 5. is a
Answer for Question No 6. is b
Answer for Question No 7. is d
Answer for Question No 8. is a
Answer for Question No 9. is b
Answer for Question No 10. is a
Answer for Question No 11. is c
Answer for Question No 12. is d
Answer for Question No 13. is c
Answer for Question No 14. is c
Answer for Question No 15. is a
Answer for Question No 16. is d
Answer for Question No 17. is d
Answer for Question No 18. is b
Answer for Question No 19. is b
Answer for Question No 20. is a
Answer for Question No 21. is b
Answer for Question No 22. is b
Answer for Question No 23. is a
Answer for Question No 24. is a
Answer for Question No 25. is a
Answer for Question No 26. is a
Answer for Question No 27. is b
Answer for Question No 28. is b
Answer for Question No 29. is b
Answer for Question No 30. is a
Answer for Question No 31. is c
Answer for Question No 32. is c
Answer for Question No 33. is c
Answer for Question No 34. is c
Answer for Question No 35. is a
Answer for Question No 36. is d
Answer for Question No 37. is d
Answer for Question No 38. is a
Answer for Question No 39. is a
Answer for Question No 40. is d
Answer for Question No 41. is c
Answer for Question No 42. is b
Answer for Question No 43. is a
Answer for Question No 44. is b
Answer for Question No 45. is a
Answer for Question No 46. is d
Answer for Question No 47. is c
Answer for Question No 48. is d
Answer for Question No 49. is b
Answer for Question No 50. is b
Answer for Question No 51. is b
Answer for Question No 52. is c
Answer for Question No 53. is b
Answer for Question No 54. is b
Answer for Question No 55. is a
Answer for Question No 56. is d
Answer for Question No 57. is c
Answer for Question No 58. is c
Answer for Question No 59. is c
Answer for Question No 60. is a
Seat No -
Total number of questions : 60
1000499 T1 ENGINEERING PHYSICS
Time : 1hr
Max Marks : 50
N.B
1) All questions are Multiple Choice Questions having single correct option.
2) Attempt any 50 questions out of 60.
3) Use of calculator is allowed.
4) Each question carries 1 Mark.
5) Specially abled students are allowed 20 minutes extra for examination.
6) Do not use pencils to darken answer.
7) Use only black/blue ball point pen to darken the appropriate circle.
8) No change will be allowed once the answer is marked on OMR Sheet.
9) Rough work shall not be done on OMR sheet or on question paper.
10) Darken ONLY ONE CIRCLE for each answer.
Q.no 1. The main principle of optical fiber is
A : total internal dispersion
B : total internal reflection
C : total internal refraction
D : none of the above
Q.no 2. The temperature at which conductivity of material becomes infinite is called.
A : Critical temperature
B : absolute temperature
C : Mean temperature
D : Crystallization temperature
Q.no 3. When the temperature of n- type semiconductor is increased
A : net negative charge increases
B : minority carriers decreases
C : electron-hole pairs increases
D : none of the above
Q.no 4. The forbidden energy gap in an insulator is of the order of
A : 1 eV
B : 2 eV
C : 0.1 eV
D : 5 eV
Q.no 5. Formation of colour in a thin film of oil is due to
A : Interference of light waves
B : Diffraction of light waves
C : Scattering of light rays rays
D : Dispersion of light rays
Q.no 6. For the wavefunction to be true or acceptable, the following conditions are to be followed by it
A : Continuous
B : Finite
C : Normalizable
D : All of these
Q.no 7. In Newton’s ring experiment ,with air as a medium between Plano convex lens and glass plate, diameter of nth dark ring is
A : √4nrλ
B : √4nr
C : √(2n-1)2rλ
D : √4nr/λ
Q.no 8. Sound travel in the form of
A : longitudinal
B : transverse
C : mechanical
D : Infrasonic waves
Q.no 9. Bending of light around the straight edge of obstacle and spreading into its geometrical shadow is called as
A : Diffraction
B : Interference
C : Polarization
D : Dispersion
Q.no 10. At 0 K, intrinsic semiconductor behaves as
A : a perfect conductor
B : a super conductor
C : a semiconductor
D : a perfect insulator
Q.no 11. The minimum amount of current passed through the body of superconducter in order of destroy the superconductivity is called.
A : induced current
B : Critical current
C : Eddy current
D : super current
Q.no 12. Loudness of sound is found to be proportional to the
A : log 10 L
B : log 10 I
C : area
D : log 10 s
Q.no 13. Effective path difference between two successive reflected rays by thin parallel film is
A : 2μtcosr+ λ/2
B : 0
C : 2μtcosr
D : 2μtcosr+n λ
Q.no 14. Ψ is called the wave function of the particle. If |Ψ|2 is 0.1, the probability of finding the particle at a given location at a given time is
A : 0.1
B : (0.1)2
C : (0.1)1/2
D : None of these
Q.no 15. Reverse bias applied on a junction diode-----------
A : raises the potential barrier
B : decrease the minority carrier current
C : increases the majority carrier current
D : lowers the potential barrier
Q.no 16. We prefer Polaroid sunglasses because they
A : have soothing colours
B : reduce the intensity of light
C : are cheaper
D : can change colour
Q.no 17. In forward bias, the width of depletion region in a p-n junction diode
A : increases
B : decreases
C : remains constant
D : first (A) then (B)
Q.no 18. When two semiconductors of p-type & n-type are brought in contact with each other, the P-N junction formed behaves like
A : an oscillator
B : an amplifier
C : a diode
D : a conductor
Q.no 19. The superconducting State is perfectly _ _ _ _ _ in nature.
A : Diamagnetic
B : Paramagnetic
C : Ferromagnetic
D : All above
Q.no 20. Types - l superconductors are ___________ temperature superconductor.
A : low
B : absolute
C : High
D : None of the Above
Q.no 21. When the size of the material is reduced to size in nano region, the energy band structure undergo______________which mainly accounts for the change in the properties of nanoparticles
A : Small variations
B : large variations
C : Splitting
D : scattering
Q.no 22. Depth sounding technique is based on principle of
A : Cavitations
B : navigation
C : reflection
D : echo sounding
Q.no 23. Which of the following will remain unchanged when a sound wave travels in air or in water?
A : Amplitude
B : frequency
C : wavelength
D : Speed
Q.no 24. Principal maxima for fraunhoffer single slit diffraction is obtained at ѳ
A : nλ
B : (n/2)π
C : 1
D : 0
Q.no 25. For constructive interference the path difference should be
A : Zero or odd multiple of wavelength
B : Only integral multiple of wavelength
C : 0
D : Zero or integral multiple of wavelength
Q.no 26. Laser action is possible only if there is
A : a set of reflecting mirrors
B : a black body
C : population inversion
D : oscillations of laser source
Q.no 27. In a narrow wave packet of matter wave
A : The position of the particle cannot be determined accurately
B : The momentum of the particle cannot be determined accurately
C : Concept of wave group does not exist
D : Phase velocity is always zero
Q.no 28. Ultrasonic waves are produced by
A : piezoelectric effect
B : Doppler effect
C : Peltier effect
D : magneto-optic effect
Q.no 29. If the material is reduced to nano size then properties of those materials _____________ from those of the bulk material
A : slightly differ
B : drastically differ
C : remain same
D : can’t say
Q.no 30. In a semiconductor, current conduction is due to
A : only holes
B : both holes and free electrons
C : only free electrons
D : none of the above
Q.no 31. _ _ _ _ _ superconductor is completely diamagnetic
A : Type - l
B : Type - ll
C : both
D : none of the above
Q.no 32. For the Solar cell the ratio of maximum power delivered to ideal power is called as
A : Efficiency
B : Fill factor
C : short-circuit
D : Open-circuit
Q.no 33. In the Fresnel diffraction the incident wave front is
A : Spherical
B : Cylindrical
C : Spherical or cylindrical
D : Plane
Q.no 34. In the P-type semiconductor, the hole concentration in valence band is----------- than the electron concentration in conduction band.
A : less than
B : greater than
C : equal to
D : all of these
Q.no 35. In Newton’s ring experiment if the air film is replaced by water film, then the diameter of the ring
A : Decreases
B : Increases
C : Remains same
D : None of the above
Q.no 36. n type & p type silicon can be obtained by doping pure silicon with
A : Arsenic & Phosphorus
B : Indium & Aluminum
C : Phosphorus & Indium
D : Aluminum & Boron
Q.no 37. If ne & nh are the number of electrons & holes in a semiconductor heavily doped with phosphorus, then
A : ne»nh
B : ne <nh
C : ne«nh
D : ne =nh
Q.no 38. The phenomena of the echo is used to measure the
A : length of metal
B : flaws in metal
C : transfer signals
D : none
Q.no 39. Photovoltaic cells convert light energy into
A : solar energy
B : electrical energy
C : mechanical energy
D : kinetic energy
Q.no 40. Optimum reverberation time for music is
A : 0.5 sec
B : 0.1lsec
C : l.2sec
D : Above 5 sec
Q.no 41. Intensity of diffraction at an angle ѳ for fraunhoffer diffraction by grating is given by Iѳ
A : (sinNβ/ sinβ)
B : (sinβ)2
C : (sinα/α)2
D : Im(sinα/α)2 (sinNβ/ sinβ)2
Q.no 42. What would be true for wavelengths of De Broglie waves
A : λ (electron) = λ (proton)
B : λ (electron) > λ (proton)
C : λ (electron) < λ (proton)
D : λ (electron) ~ λ (proton)
Q.no 43. De Broglie wave is expresssed in terms of Ψ. What is Ψ?
A : It is the energy of particles producing matter waves
B : It is the momentum of particles producing matter waves
C : It is the uncertainity in position of particles producing matter waves
D : It represents the oscillations of quantity that produces matter waves.
Q.no 44. The Cooper pairs are electron pairs with
A : equal and same momentum
B : Unequal & same spin
C : Equal and opposite momentum and spin
D : Unequal & opposite spin and momentum
Q.no 45. The walls of the hall built for music concerns should
A : Amplify sound
B : Reflect sound
C : Transmit sound
D : D Absorb sound
Q.no 46. For an infinitely deep 1 dimentional potential well, a quantum particle in the ground state is likely to be found
A : at one corner of the well
B : At 1/4th and 3/4th distance from one end of the well
C : At every point in the well with equal probability
D : At the center of the well
Q.no 47. According to the Malu’s law, the intensity of polarized light emerging through the analyzer varies as
A : I =Iₒ cosθ
B : I =Iₒ/cos2θ
C : I =Iₒ / cos²θ
D : I =Iₒ cos²θ
Q.no 48. In an N-type semiconductor, donor level is
A : above the conduction band of the host
B : close to the conduction band of the host
C : close to the valence band of the host crystal.
D : below to the valence band of the host crystal
Q.no 49. If the gap between plano- convex lens and plane glass plate filled with the liquid instead of air then
A : Diameter of rings increases
B : Diameter of rings decreases
C : Diameter of rings does not change
D : All above are correct
Q.no 50. When the size of the material reduces, the surface area to volume ratio ________
A : decreases
B : Increases
C : remains same
D : becomes exactly equal to the volume
Q.no 51. The light source used for optical pumping in Ruby laser is
A : Xenon
B : Argon
C : Neon
D : none of the above
Q.no 52. LASER is a short form of
A : Light attenuation by stimulated emission of radiation
B : Light amplification by stimulated emission of radiation
C : Light absorption by stimulated emission of radiation
D : Light absorption by spontaneous emission of radiation
Q.no 53. The phenomenon in which the magnetic line of force are expelled out of the superconducting material at Critical temperature is called.
A : isotopic effect
B : Meissner effect
C : BCS * theory
D : London theory
Q.no 54. A path difference of 3λ/2 between the two waves corresponds to the phase difference
A : 3π/2
B : π/3
C : 3π
D : 2π/3
Q.no 55. piezoelectric effect has been observed in
A : nickel
B : glass
C : quartz
D : mica
Q.no 56. Ultrasonic are sound waves having frequency greater than
A : 20 MHz
B : 20 kHz
C : 20GHz
D : 20 Hz
Q.no 57. Matter waves are associated with
A : Positively charged particles
B : Negatively charged particles
C : Neutral particles
D : All of these
Q.no 58. Intensity at any point on the screen at angle Ѳ for Fraunhoffer single slit is given by I
A : (n/2)π
B : Im(sinα/α)2
C : sin-1(nλ/a)
D : (sinα/α)2
Q.no 59. The effective path or phase difference between the reflected rays for antirefiection films
A : λ/4 or π/2
B : λ or π/2
C : λ/2 or π
D : 2λor π/2
Q.no 60. The concept of wave function is insufficient to tell about probability of particle because
A : Wave function is negative at places of negative amplitude. Thus probability would come out to be negative which is meaningless.
B : Wave function is not single valued
C : Wave function is continuous. Ψ could have been considered as the sufficient function if it had been discontinuous.
D : Wave function directlty gives the uncertainty in position and not the probability.
Answer for Question No 1. is b
Answer for Question No 2. is a
Answer for Question No 3. is c
Answer for Question No 4. is d
Answer for Question No 5. is a
Answer for Question No 6. is d
Answer for Question No 7. is a
Answer for Question No 8. is a
Answer for Question No 9. is a
Answer for Question No 10. is d
Answer for Question No 11. is b
Answer for Question No 12. is b
Answer for Question No 13. is a
Answer for Question No 14. is a
Answer for Question No 15. is a
Answer for Question No 16. is b
Answer for Question No 17. is b
Answer for Question No 18. is c
Answer for Question No 19. is a
Answer for Question No 20. is a
Answer for Question No 21. is b
Answer for Question No 22. is d
Answer for Question No 23. is b
Answer for Question No 24. is d
Answer for Question No 25. is d
Answer for Question No 26. is c
Answer for Question No 27. is b
Answer for Question No 28. is a
Answer for Question No 29. is b
Answer for Question No 30. is c
Answer for Question No 31. is a
Answer for Question No 32. is b
Answer for Question No 33. is a
Answer for Question No 34. is b
Answer for Question No 35. is a
Answer for Question No 36. is c
Answer for Question No 37. is a
Answer for Question No 38. is b
Answer for Question No 39. is b
Answer for Question No 40. is c
Answer for Question No 41. is d
Answer for Question No 42. is b
Answer for Question No 43. is d
Answer for Question No 44. is c
Answer for Question No 45. is d
Answer for Question No 46. is d
Answer for Question No 47. is d
Answer for Question No 48. is b
Answer for Question No 49. is b
Answer for Question No 50. is b
Answer for Question No 51. is a
Answer for Question No 52. is b
Answer for Question No 53. is b
Answer for Question No 54. is c
Answer for Question No 55. is c
Answer for Question No 56. is b
Answer for Question No 57. is d
Answer for Question No 58. is b
Answer for Question No 59. is c
Answer for Question No 60. is a
Seat No -
Total number of questions : 60
1000499 T1 ENGINEERING PHYSICS
Time : 1hr
Max Marks : 50
N.B
1) All questions are Multiple Choice Questions having single correct option.
2) Attempt any 50 questions out of 60.
3) Use of calculator is allowed.
4) Each question carries 1 Mark.
5) Specially abled students are allowed 20 minutes extra for examination.
6) Do not use pencils to darken answer.
7) Use only black/blue ball point pen to darken the appropriate circle.
8) No change will be allowed once the answer is marked on OMR Sheet.
9) Rough work shall not be done on OMR sheet or on question paper.
10) Darken ONLY ONE CIRCLE for each answer.
Q.no 1. Matter waves would be more significant for particles having mass
A : About 10 x 103 g
B : About 10 x 10-14 g
C : About 10 x 1014 g
D : About 10 x 10 -28 g
Q.no 2. Plane polarized light can be produced by
A : Simple reflection
B : Pile of plates
C : Nicol’s prism
D : All of these
Q.no 3. Reverse bias applied on a junction diode-----------
A : raises the potential barrier
B : decrease the minority carrier current
C : increases the majority carrier current
D : lowers the potential barrier
Q.no 4. If the material is reduced to nano size then properties of those materials _____________ from those of the bulk material
A : slightly differ
B : drastically differ
C : remain same
D : can’t say
Q.no 5. For an infinitely deep 1 dimentional potential well, a quantum particle in the ground state is likely to be found
A : at one corner of the well
B : At 1/4th and 3/4th distance from one end of the well
C : At every point in the well with equal probability
D : At the center of the well
Q.no 6. For the Solar cell the ratio of maximum power delivered to ideal power is called as
A : Efficiency
B : Fill factor
C : short-circuit
D : Open-circuit
Q.no 7. Current once initiated in a superconducting ring can continue to flow infinitely without any power losses
Is called
Is called
A : Infinite current
B : Critical current
C : Persistent current
D : induced current
Q.no 8. Intensity of diffraction at an angle ѳ for fraunhoffer diffraction by grating is given by Iѳ
A : (sinNβ/ sinβ)
B : (sinβ)2
C : (sinα/α)2
D : Im(sinα/α)2 (sinNβ/ sinβ)2
Q.no 9. Laser action is possible only if there is
A : a set of reflecting mirrors
B : a black body
C : population inversion
D : oscillations of laser source
Q.no 10. The expression for the thickness of a half-wave plate of positive crystal is
A : t = λ / (μe - μo )
B : t = λ / 2(μe - μo )
C : t = λ / 3(μe - μo )
D : t = λ /2 (μo – μe )
Q.no 11. In the P-type semiconductor, the hole concentration in valence band is----------- than the electron concentration in conduction band.
A : less than
B : greater than
C : equal to
D : all of these
Q.no 12. The main principle of optical fiber is
A : total internal dispersion
B : total internal reflection
C : total internal refraction
D : none of the above
Q.no 13. To check the optical flatness of the surface in wedge-shape thin film fringe-width must be
A : Equal, straight
B : Unequal, straight
C : Unequal, curved
D : Equal, curved
Q.no 14. Pumping process used in diode laser is
A : optical pumping
B : forward biased voltage
C : electrical discharge
D : none of these
Q.no 15. Formation of colour in a thin film of oil is due to
A : Interference of light waves
B : Diffraction of light waves
C : Scattering of light rays rays
D : Dispersion of light rays
Q.no 16. We prefer Polaroid sunglasses because they
A : have soothing colours
B : reduce the intensity of light
C : are cheaper
D : can change colour
Q.no 17. What would be true for wavelengths of De Broglie waves
A : λ (electron) = λ (proton)
B : λ (electron) > λ (proton)
C : λ (electron) < λ (proton)
D : λ (electron) ~ λ (proton)
Q.no 18. The superconducting State is perfectly _ _ _ _ _ in nature.
A : Diamagnetic
B : Paramagnetic
C : Ferromagnetic
D : All above
Q.no 19. What happens to O-ray and E-ray if they travel along the optic axis?
A : E-ray travels faster than O-ray
B : O-ray travels faster than E-ray
C : Both ray travels with same velocity
D : None of the above
Q.no 20. Effective path difference between two successive reflected rays by thin parallel film is
A : 2μtcosr+ λ/2
B : 0
C : 2μtcosr
D : 2μtcosr+n λ
Q.no 21. Which is the correct relation for forbidden energy gap in conductor, semi-conductor and insulator?
A : ΔEg conductor > ΔEg semiconductor> ΔEginsulator
B : ΔEgconductor > ΔEginsulator > Δ Eg semiconductor
C : ΔEginsulator > Δ Eg semiconductor > ΔEgconductor
D : ΔEg semiconductor > Δ Egconductor > ΔEginsulator
Q.no 22. The active medium of a helium-neon laser is made up with ________ ratio of helium-neon.
A : 10:1
B : 10:3
C : 10:5
D : 10:6
Q.no 23. Reverberation time T of a hall varies is inversely proportional as the
A : density
B : degree of sensation
C : effective area
D : square of amplitude
Q.no 24. On reverse biasing the P-N junction,its depletion region becomes
A : narrow
B : zero
C : broad
D : constant
Q.no 25. Ψ is called the wave function of the particle. If |Ψ|2 is 0.1, the probability of finding the particle at a given location at a given time is
A : 0.1
B : (0.1)2
C : (0.1)1/2
D : None of these
Q.no 26. Sound travel in the form of
A : longitudinal
B : transverse
C : mechanical
D : Infrasonic waves
Q.no 27. A path difference of 3λ/2 between the two waves corresponds to the phase difference
A : 3π/2
B : π/3
C : 3π
D : 2π/3
Q.no 28. The battery connection required to forward bias a p-n junction are
A : +ve terminal to p and —ve terminal to n
B : -ve terminal to p and —ve terminal to n
C : -ve terminal to p and +ve terminal to n
D : none of the above
Q.no 29. Which of the following cannot be polarized?
A : Radio waves
B : Sound waves
C : Light waves
D : X-rays
Q.no 30. piezoelectric effect has been observed in
A : nickel
B : glass
C : quartz
D : mica
Q.no 31. When the size of the material is reduced to size in nano region, the energy band structure undergo______________which mainly accounts for the change in the properties of nanoparticles
A : Small variations
B : large variations
C : Splitting
D : scattering
Q.no 32. Sound intensity is
A : energy/time
B : wb/m3
C : watt/m2
D : energy/time. area
Q.no 33. In Newton’s ring experiment if the air film is replaced by water film, then the diameter of the ring
A : Decreases
B : Increases
C : Remains same
D : None of the above
Q.no 34. In Newton’s ring experiment ,with air as a medium between Plano convex lens and glass plate, diameter of nth dark ring is
A : √4nrλ
B : √4nr
C : √(2n-1)2rλ
D : √4nr/λ
Q.no 35. Ultrasonic waves are produced by
A : piezoelectric effect
B : Doppler effect
C : Peltier effect
D : magneto-optic effect
Q.no 36. Principal maxima for fraunhoffer single slit diffraction is obtained at ѳ
A : nλ
B : (n/2)π
C : 1
D : 0
Q.no 37. The intensity level expressed in a unit
A : bel
B : 10-12W/m2
C : Newton
D : db/m
Q.no 38. According to de Broglie hypothesis equation λ=h/p is applicable for
A : Matter particle only
B : Photons only
C : Both matter particle and photon
D : All options are correct
Q.no 39. At 0 K, intrinsic semiconductor behaves as
A : a perfect conductor
B : a super conductor
C : a semiconductor
D : a perfect insulator
Q.no 40. A hologram is most similar to a
A : Dispersion
B : prism
C : 3-D photograph
D : compound lens
Q.no 41. The walls of the hall built for music concerns should
A : Amplify sound
B : Reflect sound
C : Transmit sound
D : D Absorb sound
Q.no 42. Laevo-rotatory optically active substance rotates the plane of vibrations
A : In clockwise direction
B : In left hand side
C : By 1800
D : None of the above
Q.no 43. _________ superconductors are also called soft superconductors
A : Type I
B : Type II
C : Type III
D : Type IV
Q.no 44. Sound waves of frequency less than 20 Hz are called
A : longitudinal wave
B : ultrasonic wave
C : Infrasonic waves
D : mechanical wave
Q.no 45. Quantum mechanically, minimum energy of a particle enclosed in a potential well cannot be
A : 1 eV
B : zero
C : 100 eV
D : 1 KeV
Q.no 46. In forward bias, the width of depletion region in a p-n junction diode
A : increases
B : decreases
C : remains constant
D : first (A) then (B)
Q.no 47. Wave function Ψ represents
A : Potential energy of particles producing matter waves
B : Oscillations of quantity that produces matter waves
C : Momentum of particles that produces matter waves
D : Kinetic energy of particles producing matter waves
Q.no 48. Nanotechnology is the science of designing,creating and using the materials in which atleast one dimension has a size in the range of
A : 1nm-100nm
B : 0.01nm to 0.1 nm
C : 100 nm- 1000nm
D : 30- 50 nm
Q.no 49. ln superconductivity, the conductivity of a material becomes.
A : zero
B : finite
C : infinite
D : None of the above
Q.no 50. The quarter wave plate produces
A : Path difference of λ/4 or phase difference of π /2 radians between O- and E-waves
B : Path difference of λ /2 or phase difference of π /2 radians
C : Path difference of λ /4 or phase difference of π radians
D : None of the above
Q.no 51. At the critical temperature and less than critical temperature the resistance of a superconductor.
A : increase rapidly
B : decrease rapidly
C : remains zero
D : increase slowly
Q.no 52. In the Fresnel diffraction the incident wave front is
A : Spherical
B : Cylindrical
C : Spherical or cylindrical
D : Plane
Q.no 53. Heisenberg Uncertainty Principle is significant for subatomic particles because
A : Their energy is small
B : They show wave particle duality
C : Their velocity is small
D : They show photoelectric effect
Q.no 54. The Cooper pairs are electron pairs with
A : equal and same momentum
B : Unequal & same spin
C : Equal and opposite momentum and spin
D : Unequal & opposite spin and momentum
Q.no 55. The normalization condition indicates that probabilities of finding the particle
A : in a small volume summed up over the entire space must give 1
B : in a small volume must give 1
C : in a small volume summed up along the positive direction must give 1
D : in a small volume summed up along the negative direction must give 1
Q.no 56. Ultrasonic are sound waves having frequency greater than
A : 20 MHz
B : 20 kHz
C : 20GHz
D : 20 Hz
Q.no 57. Heisenberg Uncertainty Principle is not significant for daily life objects because
A : The value of Planck's constant is insignificant for these particles
B : It is difficult to observe wave particle duality in daily life objects
C : Daily life objects are macroscopic
D : All of these
Q.no 58. An echo is heard when direct sound waves coming from the source and its reflected wave reach the listener with a time interval of about
A : 1/14 seconds
B : 1/3 seconds
C : 1/7 seconds
D : 1/19 seconds
Q.no 59. Velocity of sound wave is given by
A : v = f/λ
B : v = f.λ
C : v =λ/f
D : v = f/T
Q.no 60. The concept of wave function is insufficient to tell about probability of particle because
A : Wave function is negative at places of negative amplitude. Thus probability would come out to be negative which is meaningless.
B : Wave function is not single valued
C : Wave function is continuous. Ψ could have been considered as the sufficient function if it had been discontinuous.
D : Wave function directlty gives the uncertainty in position and not the probability.
Answer for Question No 1. is d
Answer for Question No 2. is d
Answer for Question No 3. is a
Answer for Question No 4. is b
Answer for Question No 5. is d
Answer for Question No 6. is b
Answer for Question No 7. is c
Answer for Question No 8. is d
Answer for Question No 9. is c
Answer for Question No 10. is b
Answer for Question No 11. is b
Answer for Question No 12. is b
Answer for Question No 13. is a
Answer for Question No 14. is b
Answer for Question No 15. is a
Answer for Question No 16. is b
Answer for Question No 17. is b
Answer for Question No 18. is a
Answer for Question No 19. is c
Answer for Question No 20. is a
Answer for Question No 21. is c
Answer for Question No 22. is a
Answer for Question No 23. is c
Answer for Question No 24. is c
Answer for Question No 25. is a
Answer for Question No 26. is a
Answer for Question No 27. is c
Answer for Question No 28. is a
Answer for Question No 29. is b
Answer for Question No 30. is c
Answer for Question No 31. is b
Answer for Question No 32. is d
Answer for Question No 33. is a
Answer for Question No 34. is a
Answer for Question No 35. is a
Answer for Question No 36. is d
Answer for Question No 37. is a
Answer for Question No 38. is c
Answer for Question No 39. is d
Answer for Question No 40. is c
Answer for Question No 41. is d
Answer for Question No 42. is b
Answer for Question No 43. is a
Answer for Question No 44. is c
Answer for Question No 45. is b
Answer for Question No 46. is b
Answer for Question No 47. is b
Answer for Question No 48. is a
Answer for Question No 49. is c
Answer for Question No 50. is a
Answer for Question No 51. is c
Answer for Question No 52. is a
Answer for Question No 53. is b
Answer for Question No 54. is c
Answer for Question No 55. is a
Answer for Question No 56. is b
Answer for Question No 57. is d
Answer for Question No 58. is c
Answer for Question No 59. is b
Answer for Question No 60. is a
Seat No -
Total number of questions : 60
1000499 T1 ENGINEERING PHYSICS
Time : 1hr
Max Marks : 50
N.B
1) All questions are Multiple Choice Questions having single correct option.
2) Attempt any 50 questions out of 60.
3) Use of calculator is allowed.
4) Each question carries 1 Mark.
5) Specially abled students are allowed 20 minutes extra for examination.
6) Do not use pencils to darken answer.
7) Use only black/blue ball point pen to darken the appropriate circle.
8) No change will be allowed once the answer is marked on OMR Sheet.
9) Rough work shall not be done on OMR sheet or on question paper.
10) Darken ONLY ONE CIRCLE for each answer.
Q.no 1. Bending of light around the straight edge of obstacle and spreading into its geometrical shadow is called as
A : Diffraction
B : Interference
C : Polarization
D : Dispersion
Q.no 2. Fringe width is defined as the distance between two consecutive
A : Crests
B : Bright fringes only
C : Dark fringes only
D : Bright or dark fringes
Q.no 3. The speed of sound in medium depends upon
A : Amplitude
B : frequency
C : wavelength
D : properties of the medium
Q.no 4. When the size of the material is reduced to size in nano region, the energy band structure undergo______________which mainly accounts for the change in the properties of nanoparticles
A : Small variations
B : large variations
C : Splitting
D : scattering
Q.no 5. The phenomenon in which the magnetic line of force are expelled out of the superconducting material at Critical temperature is called.
A : isotopic effect
B : Meissner effect
C : BCS * theory
D : London theory
Q.no 6. If the material is reduced to nano size then properties of those materials _____________ from those of the bulk material
A : slightly differ
B : drastically differ
C : remain same
D : can’t say
Q.no 7. Reverberation time T of a hall varies is inversely proportional as the
A : density
B : degree of sensation
C : effective area
D : square of amplitude
Q.no 8. Effective path difference between two successive reflected rays by thin parallel film is
A : 2μtcosr+ λ/2
B : 0
C : 2μtcosr
D : 2μtcosr+n λ
Q.no 9. The current in a superconductor produces
A : zero, voltage drop across it
B : a strong, electric field around it
C : a small voltage drop across it
D : a large voltage drop across it
Q.no 10. According to de Broglie hypothesis
A : A particle in rest has matter waves associated with it
B : A particle at rest or in motion has matter wave associated with it
C : A particle in motion has matter wave associated with it
D : All above statements are correct
Q.no 11. _________ superconductors are also called soft superconductors
A : Type I
B : Type II
C : Type III
D : Type IV
Q.no 12. Formation of colour in a thin film of oil is due to
A : Interference of light waves
B : Diffraction of light waves
C : Scattering of light rays rays
D : Dispersion of light rays
Q.no 13. The minimum amount of current passed through the body of superconducter in order of destroy the superconductivity is called.
A : induced current
B : Critical current
C : Eddy current
D : super current
Q.no 14. The characteristics of laser beam are
A : Highly directional
B : Highly intense
C : Highly monochromatic
D : All of these
Q.no 15. Depletion layer consists of
A : electrons
B : mobile ions
C : protons.
D : immobile ions
Q.no 16. The normalization condition indicates that probabilities of finding the particle
A : in a small volume summed up over the entire space must give 1
B : in a small volume must give 1
C : in a small volume summed up along the positive direction must give 1
D : in a small volume summed up along the negative direction must give 1
Q.no 17. Reverse bias applied on a junction diode-----------
A : raises the potential barrier
B : decrease the minority carrier current
C : increases the majority carrier current
D : lowers the potential barrier
Q.no 18. We prefer Polaroid sunglasses because they
A : have soothing colours
B : reduce the intensity of light
C : are cheaper
D : can change colour
Q.no 19. Data storage capacities of hard disks and have led to small and faster microprocessors due to the use of ______________
A : Nanosized electronic components
B : Pure semiconductors
C : Capacitive components
D : Inductive components
Q.no 20. Which of the following cannot be polarized?
A : Radio waves
B : Sound waves
C : Light waves
D : X-rays
Q.no 21. If the gap between plano- convex lens and plane glass plate filled with the liquid instead of air then
A : Diameter of rings increases
B : Diameter of rings decreases
C : Diameter of rings does not change
D : All above are correct
Q.no 22. The walls of the hall built for music concerns should
A : Amplify sound
B : Reflect sound
C : Transmit sound
D : D Absorb sound
Q.no 23. Which of the following when added as an impurity into the silicon produces N-type semiconductor?
A : P
B : B
C : Al
D : Mg
Q.no 24. In an N-type semiconductor, donor level is
A : above the conduction band of the host
B : close to the conduction band of the host
C : close to the valence band of the host crystal.
D : below to the valence band of the host crystal
Q.no 25. ln Magnetostriction Oscillator
A : a copper rod is used
B : a nickel rod is used
C : a magnesium rod is used
D : an aluminium rod is used
Q.no 26. To check the optical flatness of the surface in wedge-shape thin film fringe-width must be
A : Equal, straight
B : Unequal, straight
C : Unequal, curved
D : Equal, curved
Q.no 27. The phenomena of the echo is used to measure the
A : length of metal
B : flaws in metal
C : transfer signals
D : none
Q.no 28. Plane polarized light can be produced by
A : Simple reflection
B : Pile of plates
C : Nicol’s prism
D : All of these
Q.no 29. For constructive interference the path difference should be
A : Zero or odd multiple of wavelength
B : Only integral multiple of wavelength
C : 0
D : Zero or integral multiple of wavelength
Q.no 30. _ _ _ _ _ superconductor is completely diamagnetic
A : Type - l
B : Type - ll
C : both
D : none of the above
Q.no 31. Which of the following will remain unchanged when a sound wave travels in air or in water?
A : Amplitude
B : frequency
C : wavelength
D : Speed
Q.no 32. In Newton's rings the central spot is
A : Always bright
B : Always dark
C : Can be bright or dark
D : Of blue colour
Q.no 33. In a semiconductor, current conduction is due to
A : only holes
B : both holes and free electrons
C : only free electrons
D : none of the above
Q.no 34. Current once initiated in a superconducting ring can continue to flow infinitely without any power losses
Is called
Is called
A : Infinite current
B : Critical current
C : Persistent current
D : induced current
Q.no 35. The Fermi level in intrinsic semiconductor lies exactly at the of the forbidden band
A : above
B : center
C : below
D : none of these
Q.no 36. Matter waves would be more significant for particles having mass
A : About 10 x 103 g
B : About 10 x 10-14 g
C : About 10 x 1014 g
D : About 10 x 10 -28 g
Q.no 37. Ψ is called the wave function of the particle. If |Ψ|2 is 0.1, the probability of finding the particle at a given location at a given time is
A : 0.1
B : (0.1)2
C : (0.1)1/2
D : None of these
Q.no 38. Depth sounding technique is based on principle of
A : Cavitations
B : navigation
C : reflection
D : echo sounding
Q.no 39. The superconducting State is perfectly _ _ _ _ _ in nature.
A : Diamagnetic
B : Paramagnetic
C : Ferromagnetic
D : All above
Q.no 40. When a ray is reflected from denser medium, its phase changes by(in radian)
A : 0
B : π
C : 2π
D : 3π
Q.no 41. n type & p type silicon can be obtained by doping pure silicon with
A : Arsenic & Phosphorus
B : Indium & Aluminum
C : Phosphorus & Indium
D : Aluminum & Boron
Q.no 42. The impurity level in an extrinsic semiconductor is about of pure semiconductor
A : 10 atoms for 103 atoms
B : 10 atoms for 102 atoms
C : 1 atoms for 108 atoms
D : 1 atoms for 100 atom
Q.no 43. What would be true for wavelengths of De Broglie waves
A : λ (electron) = λ (proton)
B : λ (electron) > λ (proton)
C : λ (electron) < λ (proton)
D : λ (electron) ~ λ (proton)
Q.no 44. The Cooper pairs are electron pairs with
A : equal and same momentum
B : Unequal & same spin
C : Equal and opposite momentum and spin
D : Unequal & opposite spin and momentum
Q.no 45. Ultrasonic waves are produced by
A : piezoelectric effect
B : Doppler effect
C : Peltier effect
D : magneto-optic effect
Q.no 46. The forbidden energy gap in an insulator is of the order of
A : 1 eV
B : 2 eV
C : 0.1 eV
D : 5 eV
Q.no 47. The quarter wave plate produces
A : Path difference of λ/4 or phase difference of π /2 radians between O- and E-waves
B : Path difference of λ /2 or phase difference of π /2 radians
C : Path difference of λ /4 or phase difference of π radians
D : None of the above
Q.no 48. Photovoltaic cells convert light energy into
A : solar energy
B : electrical energy
C : mechanical energy
D : kinetic energy
Q.no 49. On reverse biasing the P-N junction,its depletion region becomes
A : narrow
B : zero
C : broad
D : constant
Q.no 50. Sound travel in the form of
A : longitudinal
B : transverse
C : mechanical
D : Infrasonic waves
Q.no 51. The light source used for optical pumping in Ruby laser is
A : Xenon
B : Argon
C : Neon
D : none of the above
Q.no 52. Principal maxima for fraunhoffer single slit diffraction is obtained at ѳ
A : nλ
B : (n/2)π
C : 1
D : 0
Q.no 53. In Fraunhoffer diffraction distance of slit from source and screen is
A : finite
B : infinite
C : parallel
D : not equal
Q.no 54. Laevo-rotatory optically active substance rotates the plane of vibrations
A : In clockwise direction
B : In left hand side
C : By 1800
D : None of the above
Q.no 55. Plane polarized light has vibrations
A : In one direction perpendicular to direction of propagation
B : Along the direction of propagation
C : In two directions perpendicular to direction of propagation
D : In all directions perpendicular to direction of propagation
Q.no 56. Heisenberg Uncertainty Principle is not significant for daily life objects because
A : The value of Planck's constant is insignificant for these particles
B : It is difficult to observe wave particle duality in daily life objects
C : Daily life objects are macroscopic
D : All of these
Q.no 57. The concept of wave function is insufficient to tell about probability of particle because
A : Wave function is negative at places of negative amplitude. Thus probability would come out to be negative which is meaningless.
B : Wave function is not single valued
C : Wave function is continuous. Ψ could have been considered as the sufficient function if it had been discontinuous.
D : Wave function directlty gives the uncertainty in position and not the probability.
Q.no 58. Intensity at any point on the screen at angle Ѳ for Fraunhoffer single slit is given by I
A : (n/2)π
B : Im(sinα/α)2
C : sin-1(nλ/a)
D : (sinα/α)2
Q.no 59. Velocity of sound wave is given by
A : v = f/λ
B : v = f.λ
C : v =λ/f
D : v = f/T
Q.no 60. The effective path or phase difference between the reflected rays for antirefiection films
A : λ/4 or π/2
B : λ or π/2
C : λ/2 or π
D : 2λor π/2
Answer for Question No 1. is a
Answer for Question No 2. is d
Answer for Question No 3. is d
Answer for Question No 4. is b
Answer for Question No 5. is b
Answer for Question No 6. is b
Answer for Question No 7. is c
Answer for Question No 8. is a
Answer for Question No 9. is a
Answer for Question No 10. is c
Answer for Question No 11. is a
Answer for Question No 12. is a
Answer for Question No 13. is b
Answer for Question No 14. is d
Answer for Question No 15. is d
Answer for Question No 16. is a
Answer for Question No 17. is a
Answer for Question No 18. is b
Answer for Question No 19. is a
Answer for Question No 20. is b
Answer for Question No 21. is b
Answer for Question No 22. is d
Answer for Question No 23. is a
Answer for Question No 24. is b
Answer for Question No 25. is b
Answer for Question No 26. is a
Answer for Question No 27. is b
Answer for Question No 28. is d
Answer for Question No 29. is d
Answer for Question No 30. is a
Answer for Question No 31. is b
Answer for Question No 32. is b
Answer for Question No 33. is c
Answer for Question No 34. is c
Answer for Question No 35. is b
Answer for Question No 36. is d
Answer for Question No 37. is a
Answer for Question No 38. is d
Answer for Question No 39. is a
Answer for Question No 40. is b
Answer for Question No 41. is c
Answer for Question No 42. is c
Answer for Question No 43. is b
Answer for Question No 44. is c
Answer for Question No 45. is a
Answer for Question No 46. is d
Answer for Question No 47. is a
Answer for Question No 48. is b
Answer for Question No 49. is c
Answer for Question No 50. is a
Answer for Question No 51. is a
Answer for Question No 52. is d
Answer for Question No 53. is b
Answer for Question No 54. is b
Answer for Question No 55. is a
Answer for Question No 56. is d
Answer for Question No 57. is a
Answer for Question No 58. is b
Answer for Question No 59. is b
Answer for Question No 60. is c
Seat No -
Total number of questions : 60
1000499 T1 ENGINEERING PHYSICS
Time : 1hr
Max Marks : 50
N.B
1) All questions are Multiple Choice Questions having single correct option.
2) Attempt any 50 questions out of 60.
3) Use of calculator is allowed.
4) Each question carries 1 Mark.
5) Specially abled students are allowed 20 minutes extra for examination.
6) Do not use pencils to darken answer.
7) Use only black/blue ball point pen to darken the appropriate circle.
8) No change will be allowed once the answer is marked on OMR Sheet.
9) Rough work shall not be done on OMR sheet or on question paper.
10) Darken ONLY ONE CIRCLE for each answer.
Q.no 1. ln superconductivity, the conductivity of a material becomes.
A : zero
B : finite
C : infinite
D : None of the above
Q.no 2. According to de Broglie hypothesis
A : A particle in rest has matter waves associated with it
B : A particle at rest or in motion has matter wave associated with it
C : A particle in motion has matter wave associated with it
D : All above statements are correct
Q.no 3. In the P-type semiconductor, the hole concentration in valence band is----------- than the electron concentration in conduction band.
A : less than
B : greater than
C : equal to
D : all of these
Q.no 4. The battery connection required to forward bias a p-n junction are
A : +ve terminal to p and —ve terminal to n
B : -ve terminal to p and —ve terminal to n
C : -ve terminal to p and +ve terminal to n
D : none of the above
Q.no 5. The impurity level in an extrinsic semiconductor is about of pure semiconductor
A : 10 atoms for 103 atoms
B : 10 atoms for 102 atoms
C : 1 atoms for 108 atoms
D : 1 atoms for 100 atom
Q.no 6. The light source used for optical pumping in Ruby laser is
A : Xenon
B : Argon
C : Neon
D : none of the above
Q.no 7. ln Magnetostriction Oscillator
A : a copper rod is used
B : a nickel rod is used
C : a magnesium rod is used
D : an aluminium rod is used
Q.no 8. The normalization condition indicates that probabilities of finding the particle
A : in a small volume summed up over the entire space must give 1
B : in a small volume must give 1
C : in a small volume summed up along the positive direction must give 1
D : in a small volume summed up along the negative direction must give 1
Q.no 9. The forbidden energy gap in an insulator is of the order of
A : 1 eV
B : 2 eV
C : 0.1 eV
D : 5 eV
Q.no 10. On reverse biasing the P-N junction,its depletion region becomes
A : narrow
B : zero
C : broad
D : constant
Q.no 11. Reverse bias applied on a junction diode-----------
A : raises the potential barrier
B : decrease the minority carrier current
C : increases the majority carrier current
D : lowers the potential barrier
Q.no 12. The Fermi level in intrinsic semiconductor lies exactly at the of the forbidden band
A : above
B : center
C : below
D : none of these
Q.no 13. Loudness of sound is found to be proportional to the
A : log 10 L
B : log 10 I
C : area
D : log 10 s
Q.no 14. Reverberation time T of a hall varies is inversely proportional as the
A : density
B : degree of sensation
C : effective area
D : square of amplitude
Q.no 15. A hologram is most similar to a
A : Dispersion
B : prism
C : 3-D photograph
D : compound lens
Q.no 16. Ψ is called the wave function of the particle. If |Ψ|2 is 0.1, the probability of finding the particle at a given location at a given time is
A : 0.1
B : (0.1)2
C : (0.1)1/2
D : None of these
Q.no 17. Intensity of diffraction at an angle ѳ for fraunhoffer diffraction by grating is given by Iѳ
A : (sinNβ/ sinβ)
B : (sinβ)2
C : (sinα/α)2
D : Im(sinα/α)2 (sinNβ/ sinβ)2
Q.no 18. In Newton’s ring experiment if the air film is replaced by water film, then the diameter of the ring
A : Decreases
B : Increases
C : Remains same
D : None of the above
Q.no 19. Sound travel in the form of
A : longitudinal
B : transverse
C : mechanical
D : Infrasonic waves
Q.no 20. In the Fresnel diffraction the incident wave front is
A : Spherical
B : Cylindrical
C : Spherical or cylindrical
D : Plane
Q.no 21. In Newton's rings the central spot is
A : Always bright
B : Always dark
C : Can be bright or dark
D : Of blue colour
Q.no 22. __________ are used in sunscreen lotions to protect the skin from ultraviolet radiations
A : Zinc oxide and Titanium oxide nanoparticles
B : Talcum stone particles
C : Non-metal nanoparticles
D : Quantum dots
Q.no 23. What would be true for wavelengths of De Broglie waves
A : λ (electron) = λ (proton)
B : λ (electron) > λ (proton)
C : λ (electron) < λ (proton)
D : λ (electron) ~ λ (proton)
Q.no 24. We prefer Polaroid sunglasses because they
A : have soothing colours
B : reduce the intensity of light
C : are cheaper
D : can change colour
Q.no 25. Principal maxima for fraunhoffer single slit diffraction is obtained at ѳ
A : nλ
B : (n/2)π
C : 1
D : 0
Q.no 26. Which of the following when added as an impurity into the silicon produces N-type semiconductor?
A : P
B : B
C : Al
D : Mg
Q.no 27. A path difference of 3λ/2 between the two waves corresponds to the phase difference
A : 3π/2
B : π/3
C : 3π
D : 2π/3
Q.no 28. n type & p type silicon can be obtained by doping pure silicon with
A : Arsenic & Phosphorus
B : Indium & Aluminum
C : Phosphorus & Indium
D : Aluminum & Boron
Q.no 29. The phenomena of the echo is used to measure the
A : length of metal
B : flaws in metal
C : transfer signals
D : none
Q.no 30. Depth sounding technique is based on principle of
A : Cavitations
B : navigation
C : reflection
D : echo sounding
Q.no 31. To check the optical flatness of the surface in wedge-shape thin film fringe-width must be
A : Equal, straight
B : Unequal, straight
C : Unequal, curved
D : Equal, curved
Q.no 32. In case of ruby laser, optical resonator cavity is formed by the silvered ends of
A : Ruby crystal
B : The Calcium crystal
C : Tourmaline crystal
D : Quartz crystal
Q.no 33. Plane polarized light has vibrations
A : In one direction perpendicular to direction of propagation
B : Along the direction of propagation
C : In two directions perpendicular to direction of propagation
D : In all directions perpendicular to direction of propagation
Q.no 34. Formation of colour in a thin film of oil is due to
A : Interference of light waves
B : Diffraction of light waves
C : Scattering of light rays rays
D : Dispersion of light rays
Q.no 35. Matter waves would be more significant for particles having mass
A : About 10 x 103 g
B : About 10 x 10-14 g
C : About 10 x 1014 g
D : About 10 x 10 -28 g
Q.no 36. In an N-type semiconductor, donor level is
A : above the conduction band of the host
B : close to the conduction band of the host
C : close to the valence band of the host crystal.
D : below to the valence band of the host crystal
Q.no 37. Quantum mechanically, minimum energy of a particle enclosed in a potential well cannot be
A : 1 eV
B : zero
C : 100 eV
D : 1 KeV
Q.no 38. The active medium of a helium-neon laser is made up with ________ ratio of helium-neon.
A : 10:1
B : 10:3
C : 10:5
D : 10:6
Q.no 39. Superconductivity was first observed by
A : Volta
B : Meissner
C : Kamerling Onnes
D : Schrieffer
Q.no 40. For an infinitely deep 1 dimentional potential well, a quantum particle in the ground state is likely to be found
A : at one corner of the well
B : At 1/4th and 3/4th distance from one end of the well
C : At every point in the well with equal probability
D : At the center of the well
Q.no 41. In forward bias, the width of depletion region in a p-n junction diode
A : increases
B : decreases
C : remains constant
D : first (A) then (B)
Q.no 42. Sound waves of frequency less than 20 Hz are called
A : longitudinal wave
B : ultrasonic wave
C : Infrasonic waves
D : mechanical wave
Q.no 43. In a narrow wave packet of matter wave
A : The position of the particle cannot be determined accurately
B : The momentum of the particle cannot be determined accurately
C : Concept of wave group does not exist
D : Phase velocity is always zero
Q.no 44. The phenomenon in which the magnetic line of force are expelled out of the superconducting material at Critical temperature is called.
A : isotopic effect
B : Meissner effect
C : BCS * theory
D : London theory
Q.no 45. Ultrasonic waves are produced by
A : piezoelectric effect
B : Doppler effect
C : Peltier effect
D : magneto-optic effect
Q.no 46. The current in a superconductor produces
A : zero, voltage drop across it
B : a strong, electric field around it
C : a small voltage drop across it
D : a large voltage drop across it
Q.no 47. For the wavefunction to be true or acceptable, the following conditions are to be followed by it
A : Continuous
B : Finite
C : Normalizable
D : All of these
Q.no 48. In a semiconductor, current conduction is due to
A : only holes
B : both holes and free electrons
C : only free electrons
D : none of the above
Q.no 49. When a ray is reflected from denser medium, its phase changes by(in radian)
A : 0
B : π
C : 2π
D : 3π
Q.no 50. At 0 K, intrinsic semiconductor behaves as
A : a perfect conductor
B : a super conductor
C : a semiconductor
D : a perfect insulator
Q.no 51. Sound intensity is
A : energy/time
B : wb/m3
C : watt/m2
D : energy/time. area
Q.no 52. If ne & nh are the number of electrons & holes in a semiconductor heavily doped with phosphorus, then
A : ne»nh
B : ne <nh
C : ne«nh
D : ne =nh
Q.no 53. If the gap between plano- convex lens and plane glass plate filled with the liquid instead of air then
A : Diameter of rings increases
B : Diameter of rings decreases
C : Diameter of rings does not change
D : All above are correct
Q.no 54. Which of the following cannot be polarized?
A : Radio waves
B : Sound waves
C : Light waves
D : X-rays
Q.no 55. When the size of the material reduces, the surface area to volume ratio ________
A : decreases
B : Increases
C : remains same
D : becomes exactly equal to the volume
Q.no 56. Velocity of sound wave is given by
A : v = f/λ
B : v = f.λ
C : v =λ/f
D : v = f/T
Q.no 57. Matter waves are associated with
A : Positively charged particles
B : Negatively charged particles
C : Neutral particles
D : All of these
Q.no 58. Ultrasonic are sound waves having frequency greater than
A : 20 MHz
B : 20 kHz
C : 20GHz
D : 20 Hz
Q.no 59. Schrodinger's equation is required for explaining behavior of subatomic particles because
A : Subatomic particles show wave particle duality
B : Matter wave is associated with subatomic waves
C : Newton's laws of motion cannot be applied to matter waves
D : All options are correct
Q.no 60. The concept of wave function is insufficient to tell about probability of particle because
A : Wave function is negative at places of negative amplitude. Thus probability would come out to be negative which is meaningless.
B : Wave function is not single valued
C : Wave function is continuous. Ψ could have been considered as the sufficient function if it had been discontinuous.
D : Wave function directlty gives the uncertainty in position and not the probability.
Answer for Question No 1. is c
Answer for Question No 2. is c
Answer for Question No 3. is b
Answer for Question No 4. is a
Answer for Question No 5. is c
Answer for Question No 6. is a
Answer for Question No 7. is b
Answer for Question No 8. is a
Answer for Question No 9. is d
Answer for Question No 10. is c
Answer for Question No 11. is a
Answer for Question No 12. is b
Answer for Question No 13. is b
Answer for Question No 14. is c
Answer for Question No 15. is c
Answer for Question No 16. is a
Answer for Question No 17. is d
Answer for Question No 18. is a
Answer for Question No 19. is a
Answer for Question No 20. is a
Answer for Question No 21. is b
Answer for Question No 22. is a
Answer for Question No 23. is b
Answer for Question No 24. is b
Answer for Question No 25. is d
Answer for Question No 26. is a
Answer for Question No 27. is c
Answer for Question No 28. is c
Answer for Question No 29. is b
Answer for Question No 30. is d
Answer for Question No 31. is a
Answer for Question No 32. is a
Answer for Question No 33. is a
Answer for Question No 34. is a
Answer for Question No 35. is d
Answer for Question No 36. is b
Answer for Question No 37. is b
Answer for Question No 38. is a
Answer for Question No 39. is a
Answer for Question No 40. is d
Answer for Question No 41. is b
Answer for Question No 42. is c
Answer for Question No 43. is b
Answer for Question No 44. is b
Answer for Question No 45. is a
Answer for Question No 46. is a
Answer for Question No 47. is d
Answer for Question No 48. is c
Answer for Question No 49. is b
Answer for Question No 50. is d
Answer for Question No 51. is d
Answer for Question No 52. is a
Answer for Question No 53. is b
Answer for Question No 54. is b
Answer for Question No 55. is b
Answer for Question No 56. is b
Answer for Question No 57. is d
Answer for Question No 58. is b
Answer for Question No 59. is d
Answer for Question No 60. is a
Seat No -
Total number of questions : 60
1000499 T1 ENGINEERING PHYSICS
Time : 1hr
Max Marks : 50
N.B
1) All questions are Multiple Choice Questions having single correct option.
2) Attempt any 50 questions out of 60.
3) Use of calculator is allowed.
4) Each question carries 1 Mark.
5) Specially abled students are allowed 20 minutes extra for examination.
6) Do not use pencils to darken answer.
7) Use only black/blue ball point pen to darken the appropriate circle.
8) No change will be allowed once the answer is marked on OMR Sheet.
9) Rough work shall not be done on OMR sheet or on question paper.
10) Darken ONLY ONE CIRCLE for each answer.
Q.no 1. For the wavefunction to be true or acceptable, the following conditions are to be followed by it
A : Continuous
B : Finite
C : Normalizable
D : All of these
Q.no 2. The normalization condition indicates that probabilities of finding the particle
A : in a small volume summed up over the entire space must give 1
B : in a small volume must give 1
C : in a small volume summed up along the positive direction must give 1
D : in a small volume summed up along the negative direction must give 1
Q.no 3. For an infinitely deep 1 dimentional potential well, a quantum particle in the ground state is likely to be found
A : at one corner of the well
B : At 1/4th and 3/4th distance from one end of the well
C : At every point in the well with equal probability
D : At the center of the well
Q.no 4. ln superconductivity, the conductivity of a material becomes.
A : zero
B : finite
C : infinite
D : None of the above
Q.no 5. Bending of light around the straight edge of obstacle and spreading into its geometrical shadow is called as
A : Diffraction
B : Interference
C : Polarization
D : Dispersion
Q.no 6. The impurity level in an extrinsic semiconductor is about of pure semiconductor
A : 10 atoms for 103 atoms
B : 10 atoms for 102 atoms
C : 1 atoms for 108 atoms
D : 1 atoms for 100 atom
Q.no 7. At the critical temperature and less than critical temperature the resistance of a superconductor.
A : increase rapidly
B : decrease rapidly
C : remains zero
D : increase slowly
Q.no 8. The Cooper pairs are electron pairs with
A : equal and same momentum
B : Unequal & same spin
C : Equal and opposite momentum and spin
D : Unequal & opposite spin and momentum
Q.no 9. Wave function Ψ represents
A : Potential energy of particles producing matter waves
B : Oscillations of quantity that produces matter waves
C : Momentum of particles that produces matter waves
D : Kinetic energy of particles producing matter waves
Q.no 10. When the size of the material is reduced to size in nano region, the energy band structure undergo______________which mainly accounts for the change in the properties of nanoparticles
A : Small variations
B : large variations
C : Splitting
D : scattering
Q.no 11. Which is the correct relation for forbidden energy gap in conductor, semi-conductor and insulator?
A : ΔEg conductor > ΔEg semiconductor> ΔEginsulator
B : ΔEgconductor > ΔEginsulator > Δ Eg semiconductor
C : ΔEginsulator > Δ Eg semiconductor > ΔEgconductor
D : ΔEg semiconductor > Δ Egconductor > ΔEginsulator
Q.no 12. Optimum reverberation time for music is
A : 0.5 sec
B : 0.1lsec
C : l.2sec
D : Above 5 sec
Q.no 13. The active medium of a helium-neon laser is made up with ________ ratio of helium-neon.
A : 10:1
B : 10:3
C : 10:5
D : 10:6
Q.no 14. Formation of colour in a thin film of oil is due to
A : Interference of light waves
B : Diffraction of light waves
C : Scattering of light rays rays
D : Dispersion of light rays
Q.no 15. The expression for the thickness of a half-wave plate of positive crystal is
A : t = λ / (μe - μo )
B : t = λ / 2(μe - μo )
C : t = λ / 3(μe - μo )
D : t = λ /2 (μo – μe )
Q.no 16. The walls of the hall built for music concerns should
A : Amplify sound
B : Reflect sound
C : Transmit sound
D : D Absorb sound
Q.no 17. Heisenberg Uncertainty Principle is significant for subatomic particles because
A : Their energy is small
B : They show wave particle duality
C : Their velocity is small
D : They show photoelectric effect
Q.no 18. The forbidden energy gap in an insulator is of the order of
A : 1 eV
B : 2 eV
C : 0.1 eV
D : 5 eV
Q.no 19. n type & p type silicon can be obtained by doping pure silicon with
A : Arsenic & Phosphorus
B : Indium & Aluminum
C : Phosphorus & Indium
D : Aluminum & Boron
Q.no 20. In forward bias, the width of depletion region in a p-n junction diode
A : increases
B : decreases
C : remains constant
D : first (A) then (B)
Q.no 21. _________ superconductors are also called soft superconductors
A : Type I
B : Type II
C : Type III
D : Type IV
Q.no 22. Sound intensity is
A : energy/time
B : wb/m3
C : watt/m2
D : energy/time. area
Q.no 23. According to the Malu’s law, the intensity of polarized light emerging through the analyzer varies as
A : I =Iₒ cosθ
B : I =Iₒ/cos2θ
C : I =Iₒ / cos²θ
D : I =Iₒ cos²θ
Q.no 24. The temperature at which conductivity of material becomes infinite is called.
A : Critical temperature
B : absolute temperature
C : Mean temperature
D : Crystallization temperature
Q.no 25. Depth sounding technique is based on principle of
A : Cavitations
B : navigation
C : reflection
D : echo sounding
Q.no 26. Reverse bias applied on a junction diode-----------
A : raises the potential barrier
B : decrease the minority carrier current
C : increases the majority carrier current
D : lowers the potential barrier
Q.no 27. The phenomenon in which the magnetic line of force are expelled out of the superconducting material at Critical temperature is called.
A : isotopic effect
B : Meissner effect
C : BCS * theory
D : London theory
Q.no 28. Depletion layer consists of
A : electrons
B : mobile ions
C : protons.
D : immobile ions
Q.no 29. The intensity level expressed in a unit
A : bel
B : 10-12W/m2
C : Newton
D : db/m
Q.no 30. The characteristics of laser beam are
A : Highly directional
B : Highly intense
C : Highly monochromatic
D : All of these
Q.no 31. In case of ruby laser, optical resonator cavity is formed by the silvered ends of
A : Ruby crystal
B : The Calcium crystal
C : Tourmaline crystal
D : Quartz crystal
Q.no 32. Effective path difference between two successive reflected rays by thin parallel film is
A : 2μtcosr+ λ/2
B : 0
C : 2μtcosr
D : 2μtcosr+n λ
Q.no 33. Pumping process used in diode laser is
A : optical pumping
B : forward biased voltage
C : electrical discharge
D : none of these
Q.no 34. Which of the following when added as an impurity into the silicon produces N-type semiconductor?
A : P
B : B
C : Al
D : Mg
Q.no 35. According to de Broglie hypothesis
A : A particle in rest has matter waves associated with it
B : A particle at rest or in motion has matter wave associated with it
C : A particle in motion has matter wave associated with it
D : All above statements are correct
Q.no 36. When the temperature of n- type semiconductor is increased
A : net negative charge increases
B : minority carriers decreases
C : electron-hole pairs increases
D : none of the above
Q.no 37. In the Fresnel diffraction the incident wave front is
A : Spherical
B : Cylindrical
C : Spherical or cylindrical
D : Plane
Q.no 38. A path difference of 3λ/2 between the two waves corresponds to the phase difference
A : 3π/2
B : π/3
C : 3π
D : 2π/3
Q.no 39. The light source used for optical pumping in Ruby laser is
A : Xenon
B : Argon
C : Neon
D : none of the above
Q.no 40. The points of constructive interference of light are
A : May be bright or dark
B : Always bright
C : Always dark
D : Neighter bight nor dark
Q.no 41. When two semiconductors of p-type & n-type are brought in contact with each other, the P-N junction formed behaves like
A : an oscillator
B : an amplifier
C : a diode
D : a conductor
Q.no 42. Ψ is called the wave function of the particle. If |Ψ|2 is 0.1, the probability of finding the particle at a given location at a given time is
A : 0.1
B : (0.1)2
C : (0.1)1/2
D : None of these
Q.no 43. Which of the following cannot be polarized?
A : Radio waves
B : Sound waves
C : Light waves
D : X-rays
Q.no 44. Plane polarized light can be produced by
A : Simple reflection
B : Pile of plates
C : Nicol’s prism
D : All of these
Q.no 45. Sound travel in the form of
A : longitudinal
B : transverse
C : mechanical
D : Infrasonic waves
Q.no 46. If the gap between plano- convex lens and plane glass plate filled with the liquid instead of air then
A : Diameter of rings increases
B : Diameter of rings decreases
C : Diameter of rings does not change
D : All above are correct
Q.no 47. The superconducting State is perfectly _ _ _ _ _ in nature.
A : Diamagnetic
B : Paramagnetic
C : Ferromagnetic
D : All above
Q.no 48. According to de Broglie hypothesis equation λ=h/p is applicable for
A : Matter particle only
B : Photons only
C : Both matter particle and photon
D : All options are correct
Q.no 49. In a narrow wave packet of matter wave
A : The position of the particle cannot be determined accurately
B : The momentum of the particle cannot be determined accurately
C : Concept of wave group does not exist
D : Phase velocity is always zero
Q.no 50. If the material is reduced to nano size then properties of those materials _____________ from those of the bulk material
A : slightly differ
B : drastically differ
C : remain same
D : can’t say
Q.no 51. For the Solar cell the ratio of maximum power delivered to ideal power is called as
A : Efficiency
B : Fill factor
C : short-circuit
D : Open-circuit
Q.no 52. _ _ _ _ _ superconductor is completely diamagnetic
A : Type - l
B : Type - ll
C : both
D : none of the above
Q.no 53. Plane polarized light has vibrations
A : In one direction perpendicular to direction of propagation
B : Along the direction of propagation
C : In two directions perpendicular to direction of propagation
D : In all directions perpendicular to direction of propagation
Q.no 54. Ultrasonic waves are produced by
A : piezoelectric effect
B : Doppler effect
C : Peltier effect
D : magneto-optic effect
Q.no 55. Nanotechnology is the science of designing,creating and using the materials in which atleast one dimension has a size in the range of
A : 1nm-100nm
B : 0.01nm to 0.1 nm
C : 100 nm- 1000nm
D : 30- 50 nm
Q.no 56. The effective path or phase difference between the reflected rays for antirefiection films
A : λ/4 or π/2
B : λ or π/2
C : λ/2 or π
D : 2λor π/2
Q.no 57. Velocity of sound wave is given by
A : v = f/λ
B : v = f.λ
C : v =λ/f
D : v = f/T
Q.no 58. Matter waves are associated with
A : Positively charged particles
B : Negatively charged particles
C : Neutral particles
D : All of these
Q.no 59. An echo is heard when direct sound waves coming from the source and its reflected wave reach the listener with a time interval of about
A : 1/14 seconds
B : 1/3 seconds
C : 1/7 seconds
D : 1/19 seconds
Q.no 60. Heisenberg Uncertainty Principle is not significant for daily life objects because
A : The value of Planck's constant is insignificant for these particles
B : It is difficult to observe wave particle duality in daily life objects
C : Daily life objects are macroscopic
D : All of these
Answer for Question No 1. is d
Answer for Question No 2. is a
Answer for Question No 3. is d
Answer for Question No 4. is c
Answer for Question No 5. is a
Answer for Question No 6. is c
Answer for Question No 7. is c
Answer for Question No 8. is c
Answer for Question No 9. is b
Answer for Question No 10. is b
Answer for Question No 11. is c
Answer for Question No 12. is c
Answer for Question No 13. is a
Answer for Question No 14. is a
Answer for Question No 15. is b
Answer for Question No 16. is d
Answer for Question No 17. is b
Answer for Question No 18. is d
Answer for Question No 19. is c
Answer for Question No 20. is b
Answer for Question No 21. is a
Answer for Question No 22. is d
Answer for Question No 23. is d
Answer for Question No 24. is a
Answer for Question No 25. is d
Answer for Question No 26. is a
Answer for Question No 27. is b
Answer for Question No 28. is d
Answer for Question No 29. is a
Answer for Question No 30. is d
Answer for Question No 31. is a
Answer for Question No 32. is a
Answer for Question No 33. is b
Answer for Question No 34. is a
Answer for Question No 35. is c
Answer for Question No 36. is c
Answer for Question No 37. is a
Answer for Question No 38. is c
Answer for Question No 39. is a
Answer for Question No 40. is b
Answer for Question No 41. is c
Answer for Question No 42. is a
Answer for Question No 43. is b
Answer for Question No 44. is d
Answer for Question No 45. is a
Answer for Question No 46. is b
Answer for Question No 47. is a
Answer for Question No 48. is c
Answer for Question No 49. is b
Answer for Question No 50. is b
Answer for Question No 51. is b
Answer for Question No 52. is a
Answer for Question No 53. is a
Answer for Question No 54. is a
Answer for Question No 55. is a
Answer for Question No 56. is c
Answer for Question No 57. is b
Answer for Question No 58. is d
Answer for Question No 59. is c
Answer for Question No 60. is d
Seat No -
Total number of questions : 60
1000499 T1 ENGINEERING PHYSICS
Time : 1hr
Max Marks : 50
N.B
1) All questions are Multiple Choice Questions having single correct option.
2) Attempt any 50 questions out of 60.
3) Use of calculator is allowed.
4) Each question carries 1 Mark.
5) Specially abled students are allowed 20 minutes extra for examination.
6) Do not use pencils to darken answer.
7) Use only black/blue ball point pen to darken the appropriate circle.
8) No change will be allowed once the answer is marked on OMR Sheet.
9) Rough work shall not be done on OMR sheet or on question paper.
10) Darken ONLY ONE CIRCLE for each answer.
Q.no 1. The intensity level expressed in a unit
A : bel
B : 10-12W/m2
C : Newton
D : db/m
Q.no 2. When the size of the material is reduced to size in nano region, the energy band structure undergo______________which mainly accounts for the change in the properties of nanoparticles
A : Small variations
B : large variations
C : Splitting
D : scattering
Q.no 3. Loudness of sound is found to be proportional to the
A : log 10 L
B : log 10 I
C : area
D : log 10 s
Q.no 4. The speed of sound in medium depends upon
A : Amplitude
B : frequency
C : wavelength
D : properties of the medium
Q.no 5. At the critical temperature and less than critical temperature the resistance of a superconductor.
A : increase rapidly
B : decrease rapidly
C : remains zero
D : increase slowly
Q.no 6. If ne & nh are the number of electrons & holes in a semiconductor heavily doped with phosphorus, then
A : ne»nh
B : ne <nh
C : ne«nh
D : ne =nh
Q.no 7. Bending of light around the straight edge of obstacle and spreading into its geometrical shadow is called as
A : Diffraction
B : Interference
C : Polarization
D : Dispersion
Q.no 8. The superconducting State is perfectly _ _ _ _ _ in nature.
A : Diamagnetic
B : Paramagnetic
C : Ferromagnetic
D : All above
Q.no 9. Reverberation time T of a hall varies is inversely proportional as the
A : density
B : degree of sensation
C : effective area
D : square of amplitude
Q.no 10. For the wavefunction to be true or acceptable, the following conditions are to be followed by it
A : Continuous
B : Finite
C : Normalizable
D : All of these
Q.no 11. n type & p type silicon can be obtained by doping pure silicon with
A : Arsenic & Phosphorus
B : Indium & Aluminum
C : Phosphorus & Indium
D : Aluminum & Boron
Q.no 12. __________ are used in sunscreen lotions to protect the skin from ultraviolet radiations
A : Zinc oxide and Titanium oxide nanoparticles
B : Talcum stone particles
C : Non-metal nanoparticles
D : Quantum dots
Q.no 13. The battery connection required to forward bias a p-n junction are
A : +ve terminal to p and —ve terminal to n
B : -ve terminal to p and —ve terminal to n
C : -ve terminal to p and +ve terminal to n
D : none of the above
Q.no 14. Principal maxima for fraunhoffer single slit diffraction is obtained at ѳ
A : nλ
B : (n/2)π
C : 1
D : 0
Q.no 15. ln Magnetostriction Oscillator
A : a copper rod is used
B : a nickel rod is used
C : a magnesium rod is used
D : an aluminium rod is used
Q.no 16. If the material is reduced to nano size then properties of those materials _____________ from those of the bulk material
A : slightly differ
B : drastically differ
C : remain same
D : can’t say
Q.no 17. The temperature at which conductivity of material becomes infinite is called.
A : Critical temperature
B : absolute temperature
C : Mean temperature
D : Crystallization temperature
Q.no 18. Laser action is possible only if there is
A : a set of reflecting mirrors
B : a black body
C : population inversion
D : oscillations of laser source
Q.no 19. Wave function Ψ represents
A : Potential energy of particles producing matter waves
B : Oscillations of quantity that produces matter waves
C : Momentum of particles that produces matter waves
D : Kinetic energy of particles producing matter waves
Q.no 20. When the light is incident at the polarizing angle, which of the following is completely polarized?
A : reflected light
B : refracted light
C : both reflected as well as refracted light
D : neither reflected nor refracted light
Q.no 21. If the gap between plano- convex lens and plane glass plate filled with the liquid instead of air then
A : Diameter of rings increases
B : Diameter of rings decreases
C : Diameter of rings does not change
D : All above are correct
Q.no 22. At 0 K, intrinsic semiconductor behaves as
A : a perfect conductor
B : a super conductor
C : a semiconductor
D : a perfect insulator
Q.no 23. LASER is a short form of
A : Light attenuation by stimulated emission of radiation
B : Light amplification by stimulated emission of radiation
C : Light absorption by stimulated emission of radiation
D : Light absorption by spontaneous emission of radiation
Q.no 24. The current in a superconductor produces
A : zero, voltage drop across it
B : a strong, electric field around it
C : a small voltage drop across it
D : a large voltage drop across it
Q.no 25. In the P-type semiconductor, the hole concentration in valence band is----------- than the electron concentration in conduction band.
A : less than
B : greater than
C : equal to
D : all of these
Q.no 26. Which of the following when added as an impurity into the silicon produces N-type semiconductor?
A : P
B : B
C : Al
D : Mg
Q.no 27. Current once initiated in a superconducting ring can continue to flow infinitely without any power losses
Is called
Is called
A : Infinite current
B : Critical current
C : Persistent current
D : induced current
Q.no 28. Which of the following will remain unchanged when a sound wave travels in air or in water?
A : Amplitude
B : frequency
C : wavelength
D : Speed
Q.no 29. When a ray is reflected from denser medium, its phase changes by(in radian)
A : 0
B : π
C : 2π
D : 3π
Q.no 30. Intensity of diffraction at an angle ѳ for fraunhoffer diffraction by grating is given by Iѳ
A : (sinNβ/ sinβ)
B : (sinβ)2
C : (sinα/α)2
D : Im(sinα/α)2 (sinNβ/ sinβ)2
Q.no 31. According to the Malu’s law, the intensity of polarized light emerging through the analyzer varies as
A : I =Iₒ cosθ
B : I =Iₒ/cos2θ
C : I =Iₒ / cos²θ
D : I =Iₒ cos²θ
Q.no 32. The impurity level in an extrinsic semiconductor is about of pure semiconductor
A : 10 atoms for 103 atoms
B : 10 atoms for 102 atoms
C : 1 atoms for 108 atoms
D : 1 atoms for 100 atom
Q.no 33. When the temperature of n- type semiconductor is increased
A : net negative charge increases
B : minority carriers decreases
C : electron-hole pairs increases
D : none of the above
Q.no 34. Laevo-rotatory optically active substance rotates the plane of vibrations
A : In clockwise direction
B : In left hand side
C : By 1800
D : None of the above
Q.no 35. A hologram is most similar to a
A : Dispersion
B : prism
C : 3-D photograph
D : compound lens
Q.no 36. In forward bias, the width of depletion region in a p-n junction diode
A : increases
B : decreases
C : remains constant
D : first (A) then (B)
Q.no 37. On reverse biasing the P-N junction,its depletion region becomes
A : narrow
B : zero
C : broad
D : constant
Q.no 38. In a narrow wave packet of matter wave
A : The position of the particle cannot be determined accurately
B : The momentum of the particle cannot be determined accurately
C : Concept of wave group does not exist
D : Phase velocity is always zero
Q.no 39. De Broglie wave is expresssed in terms of Ψ. What is Ψ?
A : It is the energy of particles producing matter waves
B : It is the momentum of particles producing matter waves
C : It is the uncertainity in position of particles producing matter waves
D : It represents the oscillations of quantity that produces matter waves.
Q.no 40. piezoelectric effect has been observed in
A : nickel
B : glass
C : quartz
D : mica
Q.no 41. In a semiconductor, current conduction is due to
A : only holes
B : both holes and free electrons
C : only free electrons
D : none of the above
Q.no 42. Pumping process used in diode laser is
A : optical pumping
B : forward biased voltage
C : electrical discharge
D : none of these
Q.no 43. According to de Broglie hypothesis equation λ=h/p is applicable for
A : Matter particle only
B : Photons only
C : Both matter particle and photon
D : All options are correct
Q.no 44. Reverse bias applied on a junction diode-----------
A : raises the potential barrier
B : decrease the minority carrier current
C : increases the majority carrier current
D : lowers the potential barrier
Q.no 45. The Cooper pairs are electron pairs with
A : equal and same momentum
B : Unequal & same spin
C : Equal and opposite momentum and spin
D : Unequal & opposite spin and momentum
Q.no 46. The quarter wave plate produces
A : Path difference of λ/4 or phase difference of π /2 radians between O- and E-waves
B : Path difference of λ /2 or phase difference of π /2 radians
C : Path difference of λ /4 or phase difference of π radians
D : None of the above
Q.no 47. The active medium of a helium-neon laser is made up with ________ ratio of helium-neon.
A : 10:1
B : 10:3
C : 10:5
D : 10:6
Q.no 48. A path difference of 3λ/2 between the two waves corresponds to the phase difference
A : 3π/2
B : π/3
C : 3π
D : 2π/3
Q.no 49. The normalization condition indicates that probabilities of finding the particle
A : in a small volume summed up over the entire space must give 1
B : in a small volume must give 1
C : in a small volume summed up along the positive direction must give 1
D : in a small volume summed up along the negative direction must give 1
Q.no 50. Sound travel in the form of
A : longitudinal
B : transverse
C : mechanical
D : Infrasonic waves
Q.no 51. Sound intensity is
A : energy/time
B : wb/m3
C : watt/m2
D : energy/time. area
Q.no 52. Photovoltaic cells convert light energy into
A : solar energy
B : electrical energy
C : mechanical energy
D : kinetic energy
Q.no 53. In the Fresnel diffraction the incident wave front is
A : Spherical
B : Cylindrical
C : Spherical or cylindrical
D : Plane
Q.no 54. Quantum mechanically, minimum energy of a particle enclosed in a potential well cannot be
A : 1 eV
B : zero
C : 100 eV
D : 1 KeV
Q.no 55. The expression for the thickness of a half-wave plate of positive crystal is
A : t = λ / (μe - μo )
B : t = λ / 2(μe - μo )
C : t = λ / 3(μe - μo )
D : t = λ /2 (μo – μe )
Q.no 56. Ultrasonic are sound waves having frequency greater than
A : 20 MHz
B : 20 kHz
C : 20GHz
D : 20 Hz
Q.no 57. The effective path or phase difference between the reflected rays for antirefiection films
A : λ/4 or π/2
B : λ or π/2
C : λ/2 or π
D : 2λor π/2
Q.no 58. Heisenberg Uncertainty Principle is not significant for daily life objects because
A : The value of Planck's constant is insignificant for these particles
B : It is difficult to observe wave particle duality in daily life objects
C : Daily life objects are macroscopic
D : All of these
Q.no 59. An echo is heard when direct sound waves coming from the source and its reflected wave reach the listener with a time interval of about
A : 1/14 seconds
B : 1/3 seconds
C : 1/7 seconds
D : 1/19 seconds
Q.no 60. Intensity at any point on the screen at angle Ѳ for Fraunhoffer single slit is given by I
A : (n/2)π
B : Im(sinα/α)2
C : sin-1(nλ/a)
D : (sinα/α)2
Answer for Question No 1. is a
Answer for Question No 2. is b
Answer for Question No 3. is b
Answer for Question No 4. is d
Answer for Question No 5. is c
Answer for Question No 6. is a
Answer for Question No 7. is a
Answer for Question No 8. is a
Answer for Question No 9. is c
Answer for Question No 10. is d
Answer for Question No 11. is c
Answer for Question No 12. is a
Answer for Question No 13. is a
Answer for Question No 14. is d
Answer for Question No 15. is b
Answer for Question No 16. is b
Answer for Question No 17. is a
Answer for Question No 18. is c
Answer for Question No 19. is b
Answer for Question No 20. is a
Answer for Question No 21. is b
Answer for Question No 22. is d
Answer for Question No 23. is b
Answer for Question No 24. is a
Answer for Question No 25. is b
Answer for Question No 26. is a
Answer for Question No 27. is c
Answer for Question No 28. is b
Answer for Question No 29. is b
Answer for Question No 30. is d
Answer for Question No 31. is d
Answer for Question No 32. is c
Answer for Question No 33. is c
Answer for Question No 34. is b
Answer for Question No 35. is c
Answer for Question No 36. is b
Answer for Question No 37. is c
Answer for Question No 38. is b
Answer for Question No 39. is d
Answer for Question No 40. is c
Answer for Question No 41. is c
Answer for Question No 42. is b
Answer for Question No 43. is c
Answer for Question No 44. is a
Answer for Question No 45. is c
Answer for Question No 46. is a
Answer for Question No 47. is a
Answer for Question No 48. is c
Answer for Question No 49. is a
Answer for Question No 50. is a
Answer for Question No 51. is d
Answer for Question No 52. is b
Answer for Question No 53. is a
Answer for Question No 54. is b
Answer for Question No 55. is b
Answer for Question No 56. is b
Answer for Question No 57. is c
Answer for Question No 58. is d
Answer for Question No 59. is c
Answer for Question No 60. is b
Seat No -
Total number of questions : 60
1000499 T1 ENGINEERING PHYSICS
Time : 1hr
Max Marks : 50
N.B
1) All questions are Multiple Choice Questions having single correct option.
2) Attempt any 50 questions out of 60.
3) Use of calculator is allowed.
4) Each question carries 1 Mark.
5) Specially abled students are allowed 20 minutes extra for examination.
6) Do not use pencils to darken answer.
7) Use only black/blue ball point pen to darken the appropriate circle.
8) No change will be allowed once the answer is marked on OMR Sheet.
9) Rough work shall not be done on OMR sheet or on question paper.
10) Darken ONLY ONE CIRCLE for each answer.
Q.no 1. The forbidden energy gap in an insulator is of the order of
A : 1 eV
B : 2 eV
C : 0.1 eV
D : 5 eV
Q.no 2. In a narrow wave packet of matter wave
A : The position of the particle cannot be determined accurately
B : The momentum of the particle cannot be determined accurately
C : Concept of wave group does not exist
D : Phase velocity is always zero
Q.no 3. The current in a superconductor produces
A : zero, voltage drop across it
B : a strong, electric field around it
C : a small voltage drop across it
D : a large voltage drop across it
Q.no 4. Plane polarized light has vibrations
A : In one direction perpendicular to direction of propagation
B : Along the direction of propagation
C : In two directions perpendicular to direction of propagation
D : In all directions perpendicular to direction of propagation
Q.no 5. The walls of the hall built for music concerns should
A : Amplify sound
B : Reflect sound
C : Transmit sound
D : D Absorb sound
Q.no 6. In case of ruby laser, optical resonator cavity is formed by the silvered ends of
A : Ruby crystal
B : The Calcium crystal
C : Tourmaline crystal
D : Quartz crystal
Q.no 7. Reverse bias applied on a junction diode-----------
A : raises the potential barrier
B : decrease the minority carrier current
C : increases the majority carrier current
D : lowers the potential barrier
Q.no 8. Which of the following will remain unchanged when a sound wave travels in air or in water?
A : Amplitude
B : frequency
C : wavelength
D : Speed
Q.no 9. ln Magnetostriction Oscillator
A : a copper rod is used
B : a nickel rod is used
C : a magnesium rod is used
D : an aluminium rod is used
Q.no 10. Depth sounding technique is based on principle of
A : Cavitations
B : navigation
C : reflection
D : echo sounding
Q.no 11. In the Fresnel diffraction the incident wave front is
A : Spherical
B : Cylindrical
C : Spherical or cylindrical
D : Plane
Q.no 12. For the wavefunction to be true or acceptable, the following conditions are to be followed by it
A : Continuous
B : Finite
C : Normalizable
D : All of these
Q.no 13. According to de Broglie hypothesis equation λ=h/p is applicable for
A : Matter particle only
B : Photons only
C : Both matter particle and photon
D : All options are correct
Q.no 14. The phenomena of the echo is used to measure the
A : length of metal
B : flaws in metal
C : transfer signals
D : none
Q.no 15. At 0 K, intrinsic semiconductor behaves as
A : a perfect conductor
B : a super conductor
C : a semiconductor
D : a perfect insulator
Q.no 16. The battery connection required to forward bias a p-n junction are
A : +ve terminal to p and —ve terminal to n
B : -ve terminal to p and —ve terminal to n
C : -ve terminal to p and +ve terminal to n
D : none of the above
Q.no 17. In Fraunhoffer diffraction distance of slit from source and screen is
A : finite
B : infinite
C : parallel
D : not equal
Q.no 18. In a semiconductor, current conduction is due to
A : only holes
B : both holes and free electrons
C : only free electrons
D : none of the above
Q.no 19. Heisenberg Uncertainty Principle is significant for subatomic particles because
A : Their energy is small
B : They show wave particle duality
C : Their velocity is small
D : They show photoelectric effect
Q.no 20. Principal maxima for fraunhoffer single slit diffraction is obtained at ѳ
A : nλ
B : (n/2)π
C : 1
D : 0
Q.no 21. According to de Broglie hypothesis
A : A particle in rest has matter waves associated with it
B : A particle at rest or in motion has matter wave associated with it
C : A particle in motion has matter wave associated with it
D : All above statements are correct
Q.no 22. Effective path difference between two successive reflected rays by thin parallel film is
A : 2μtcosr+ λ/2
B : 0
C : 2μtcosr
D : 2μtcosr+n λ
Q.no 23. Intensity of diffraction at an angle ѳ for fraunhoffer diffraction by grating is given by Iѳ
A : (sinNβ/ sinβ)
B : (sinβ)2
C : (sinα/α)2
D : Im(sinα/α)2 (sinNβ/ sinβ)2
Q.no 24. In Newton’s ring experiment ,with air as a medium between Plano convex lens and glass plate, diameter of nth dark ring is
A : √4nrλ
B : √4nr
C : √(2n-1)2rλ
D : √4nr/λ
Q.no 25. Ultrasonic waves are produced by
A : piezoelectric effect
B : Doppler effect
C : Peltier effect
D : magneto-optic effect
Q.no 26. Pumping process used in diode laser is
A : optical pumping
B : forward biased voltage
C : electrical discharge
D : none of these
Q.no 27. Matter waves would be more significant for particles having mass
A : About 10 x 103 g
B : About 10 x 10-14 g
C : About 10 x 1014 g
D : About 10 x 10 -28 g
Q.no 28. _________ superconductors are also called soft superconductors
A : Type I
B : Type II
C : Type III
D : Type IV
Q.no 29. For the Solar cell the ratio of maximum power delivered to ideal power is called as
A : Efficiency
B : Fill factor
C : short-circuit
D : Open-circuit
Q.no 30. If the material is reduced to nano size then properties of those materials _____________ from those of the bulk material
A : slightly differ
B : drastically differ
C : remain same
D : can’t say
Q.no 31. Bending of light around the straight edge of obstacle and spreading into its geometrical shadow is called as
A : Diffraction
B : Interference
C : Polarization
D : Dispersion
Q.no 32. For constructive interference the path difference should be
A : Zero or odd multiple of wavelength
B : Only integral multiple of wavelength
C : 0
D : Zero or integral multiple of wavelength
Q.no 33. Plane polarized light can be produced by
A : Simple reflection
B : Pile of plates
C : Nicol’s prism
D : All of these
Q.no 34. A path difference of 3λ/2 between the two waves corresponds to the phase difference
A : 3π/2
B : π/3
C : 3π
D : 2π/3
Q.no 35. The Fermi level in intrinsic semiconductor lies exactly at the of the forbidden band
A : above
B : center
C : below
D : none of these
Q.no 36. Superconductivity was first observed by
A : Volta
B : Meissner
C : Kamerling Onnes
D : Schrieffer
Q.no 37. When a ray is reflected from denser medium, its phase changes by(in radian)
A : 0
B : π
C : 2π
D : 3π
Q.no 38. The temperature at which conductivity of material becomes infinite is called.
A : Critical temperature
B : absolute temperature
C : Mean temperature
D : Crystallization temperature
Q.no 39. Wave function Ψ represents
A : Potential energy of particles producing matter waves
B : Oscillations of quantity that produces matter waves
C : Momentum of particles that produces matter waves
D : Kinetic energy of particles producing matter waves
Q.no 40. When the light is incident at the polarizing angle, which of the following is completely polarized?
A : reflected light
B : refracted light
C : both reflected as well as refracted light
D : neither reflected nor refracted light
Q.no 41. What would be true for wavelengths of De Broglie waves
A : λ (electron) = λ (proton)
B : λ (electron) > λ (proton)
C : λ (electron) < λ (proton)
D : λ (electron) ~ λ (proton)
Q.no 42. Reverberation time T of a hall varies is inversely proportional as the
A : density
B : degree of sensation
C : effective area
D : square of amplitude
Q.no 43. If the gap between plano- convex lens and plane glass plate filled with the liquid instead of air then
A : Diameter of rings increases
B : Diameter of rings decreases
C : Diameter of rings does not change
D : All above are correct
Q.no 44. Sound intensity is
A : energy/time
B : wb/m3
C : watt/m2
D : energy/time. area
Q.no 45. Quantum mechanically, minimum energy of a particle enclosed in a potential well cannot be
A : 1 eV
B : zero
C : 100 eV
D : 1 KeV
Q.no 46. When the temperature of n- type semiconductor is increased
A : net negative charge increases
B : minority carriers decreases
C : electron-hole pairs increases
D : none of the above
Q.no 47. The characteristics of laser beam are
A : Highly directional
B : Highly intense
C : Highly monochromatic
D : All of these
Q.no 48. The intensity level expressed in a unit
A : bel
B : 10-12W/m2
C : Newton
D : db/m
Q.no 49. Types - l superconductors are ___________ temperature superconductor.
A : low
B : absolute
C : High
D : None of the Above
Q.no 50. The quarter wave plate produces
A : Path difference of λ/4 or phase difference of π /2 radians between O- and E-waves
B : Path difference of λ /2 or phase difference of π /2 radians
C : Path difference of λ /4 or phase difference of π radians
D : None of the above
Q.no 51. The superconducting State is perfectly _ _ _ _ _ in nature.
A : Diamagnetic
B : Paramagnetic
C : Ferromagnetic
D : All above
Q.no 52. Photovoltaic cells convert light energy into
A : solar energy
B : electrical energy
C : mechanical energy
D : kinetic energy
Q.no 53. Optimum reverberation time for music is
A : 0.5 sec
B : 0.1lsec
C : l.2sec
D : Above 5 sec
Q.no 54. De Broglie wave is expresssed in terms of Ψ. What is Ψ?
A : It is the energy of particles producing matter waves
B : It is the momentum of particles producing matter waves
C : It is the uncertainity in position of particles producing matter waves
D : It represents the oscillations of quantity that produces matter waves.
Q.no 55. Which of the following cannot be polarized?
A : Radio waves
B : Sound waves
C : Light waves
D : X-rays
Q.no 56. Schrodinger's equation is required for explaining behavior of subatomic particles because
A : Subatomic particles show wave particle duality
B : Matter wave is associated with subatomic waves
C : Newton's laws of motion cannot be applied to matter waves
D : All options are correct
Q.no 57. The concept of wave function is insufficient to tell about probability of particle because
A : Wave function is negative at places of negative amplitude. Thus probability would come out to be negative which is meaningless.
B : Wave function is not single valued
C : Wave function is continuous. Ψ could have been considered as the sufficient function if it had been discontinuous.
D : Wave function directlty gives the uncertainty in position and not the probability.
Q.no 58. Matter waves are associated with
A : Positively charged particles
B : Negatively charged particles
C : Neutral particles
D : All of these
Q.no 59. Ultrasonic are sound waves having frequency greater than
A : 20 MHz
B : 20 kHz
C : 20GHz
D : 20 Hz
Q.no 60. Intensity at any point on the screen at angle Ѳ for Fraunhoffer single slit is given by I
A : (n/2)π
B : Im(sinα/α)2
C : sin-1(nλ/a)
D : (sinα/α)2
Answer for Question No 1. is d
Answer for Question No 2. is b
Answer for Question No 3. is a
Answer for Question No 4. is a
Answer for Question No 5. is d
Answer for Question No 6. is a
Answer for Question No 7. is a
Answer for Question No 8. is b
Answer for Question No 9. is b
Answer for Question No 10. is d
Answer for Question No 11. is a
Answer for Question No 12. is d
Answer for Question No 13. is c
Answer for Question No 14. is b
Answer for Question No 15. is d
Answer for Question No 16. is a
Answer for Question No 17. is b
Answer for Question No 18. is c
Answer for Question No 19. is b
Answer for Question No 20. is d
Answer for Question No 21. is c
Answer for Question No 22. is a
Answer for Question No 23. is d
Answer for Question No 24. is a
Answer for Question No 25. is a
Answer for Question No 26. is b
Answer for Question No 27. is d
Answer for Question No 28. is a
Answer for Question No 29. is b
Answer for Question No 30. is b
Answer for Question No 31. is a
Answer for Question No 32. is d
Answer for Question No 33. is d
Answer for Question No 34. is c
Answer for Question No 35. is b
Answer for Question No 36. is a
Answer for Question No 37. is b
Answer for Question No 38. is a
Answer for Question No 39. is b
Answer for Question No 40. is a
Answer for Question No 41. is b
Answer for Question No 42. is c
Answer for Question No 43. is b
Answer for Question No 44. is d
Answer for Question No 45. is b
Answer for Question No 46. is c
Answer for Question No 47. is d
Answer for Question No 48. is a
Answer for Question No 49. is a
Answer for Question No 50. is a
Answer for Question No 51. is a
Answer for Question No 52. is b
Answer for Question No 53. is c
Answer for Question No 54. is d
Answer for Question No 55. is b
Answer for Question No 56. is d
Answer for Question No 57. is a
Answer for Question No 58. is d
Answer for Question No 59. is b
Answer for Question No 60. is b
Seat No -
Total number of questions : 60
1000499 T1 ENGINEERING PHYSICS
Time : 1hr
Max Marks : 50
N.B
1) All questions are Multiple Choice Questions having single correct option.
2) Attempt any 50 questions out of 60.
3) Use of calculator is allowed.
4) Each question carries 1 Mark.
5) Specially abled students are allowed 20 minutes extra for examination.
6) Do not use pencils to darken answer.
7) Use only black/blue ball point pen to darken the appropriate circle.
8) No change will be allowed once the answer is marked on OMR Sheet.
9) Rough work shall not be done on OMR sheet or on question paper.
10) Darken ONLY ONE CIRCLE for each answer.
Q.no 1. In case of ruby laser, optical resonator cavity is formed by the silvered ends of
A : Ruby crystal
B : The Calcium crystal
C : Tourmaline crystal
D : Quartz crystal
Q.no 2. According to de Broglie hypothesis equation λ=h/p is applicable for
A : Matter particle only
B : Photons only
C : Both matter particle and photon
D : All options are correct
Q.no 3. The points of constructive interference of light are
A : May be bright or dark
B : Always bright
C : Always dark
D : Neighter bight nor dark
Q.no 4. Superconductivity was first observed by
A : Volta
B : Meissner
C : Kamerling Onnes
D : Schrieffer
Q.no 5. For constructive interference the path difference should be
A : Zero or odd multiple of wavelength
B : Only integral multiple of wavelength
C : 0
D : Zero or integral multiple of wavelength
Q.no 6. ln superconductivity, the conductivity of a material becomes.
A : zero
B : finite
C : infinite
D : None of the above
Q.no 7. Intensity of diffraction at an angle ѳ for fraunhoffer diffraction by grating is given by Iѳ
A : (sinNβ/ sinβ)
B : (sinβ)2
C : (sinα/α)2
D : Im(sinα/α)2 (sinNβ/ sinβ)2
Q.no 8. Sound waves of frequency less than 20 Hz are called
A : longitudinal wave
B : ultrasonic wave
C : Infrasonic waves
D : mechanical wave
Q.no 9. Pumping process used in diode laser is
A : optical pumping
B : forward biased voltage
C : electrical discharge
D : none of these
Q.no 10. n type & p type silicon can be obtained by doping pure silicon with
A : Arsenic & Phosphorus
B : Indium & Aluminum
C : Phosphorus & Indium
D : Aluminum & Boron
Q.no 11. The phenomena of the echo is used to measure the
A : length of metal
B : flaws in metal
C : transfer signals
D : none
Q.no 12. The intensity of central bright band in the case of diffraction is
A : maximum
B : minimum
C : varies between max to min
D : none of above
Q.no 13. If the material is reduced to nano size then properties of those materials _____________ from those of the bulk material
A : slightly differ
B : drastically differ
C : remain same
D : can’t say
Q.no 14. Data storage capacities of hard disks and have led to small and faster microprocessors due to the use of ______________
A : Nanosized electronic components
B : Pure semiconductors
C : Capacitive components
D : Inductive components
Q.no 15. Heisenberg Uncertainty Principle is significant for subatomic particles because
A : Their energy is small
B : They show wave particle duality
C : Their velocity is small
D : They show photoelectric effect
Q.no 16. Laser action is possible only if there is
A : a set of reflecting mirrors
B : a black body
C : population inversion
D : oscillations of laser source
Q.no 17. In forward bias, the width of depletion region in a p-n junction diode
A : increases
B : decreases
C : remains constant
D : first (A) then (B)
Q.no 18. What would be true for wavelengths of De Broglie waves
A : λ (electron) = λ (proton)
B : λ (electron) > λ (proton)
C : λ (electron) < λ (proton)
D : λ (electron) ~ λ (proton)
Q.no 19. We prefer Polaroid sunglasses because they
A : have soothing colours
B : reduce the intensity of light
C : are cheaper
D : can change colour
Q.no 20. Matter waves would be more significant for particles having mass
A : About 10 x 103 g
B : About 10 x 10-14 g
C : About 10 x 1014 g
D : About 10 x 10 -28 g
Q.no 21. When the size of the material reduces, the surface area to volume ratio ________
A : decreases
B : Increases
C : remains same
D : becomes exactly equal to the volume
Q.no 22. Depth sounding technique is based on principle of
A : Cavitations
B : navigation
C : reflection
D : echo sounding
Q.no 23. In a semiconductor, current conduction is due to
A : only holes
B : both holes and free electrons
C : only free electrons
D : none of the above
Q.no 24. __________ are used in sunscreen lotions to protect the skin from ultraviolet radiations
A : Zinc oxide and Titanium oxide nanoparticles
B : Talcum stone particles
C : Non-metal nanoparticles
D : Quantum dots
Q.no 25. In Newton’s ring experiment ,with air as a medium between Plano convex lens and glass plate, diameter of nth dark ring is
A : √4nrλ
B : √4nr
C : √(2n-1)2rλ
D : √4nr/λ
Q.no 26. The characteristics of laser beam are
A : Highly directional
B : Highly intense
C : Highly monochromatic
D : All of these
Q.no 27. Types - l superconductors are ___________ temperature superconductor.
A : low
B : absolute
C : High
D : None of the Above
Q.no 28. Laevo-rotatory optically active substance rotates the plane of vibrations
A : In clockwise direction
B : In left hand side
C : By 1800
D : None of the above
Q.no 29. According to de Broglie hypothesis
A : A particle in rest has matter waves associated with it
B : A particle at rest or in motion has matter wave associated with it
C : A particle in motion has matter wave associated with it
D : All above statements are correct
Q.no 30. The Cooper pairs are electron pairs with
A : equal and same momentum
B : Unequal & same spin
C : Equal and opposite momentum and spin
D : Unequal & opposite spin and momentum
Q.no 31. Principal maxima for fraunhoffer single slit diffraction is obtained at ѳ
A : nλ
B : (n/2)π
C : 1
D : 0
Q.no 32. If the gap between plano- convex lens and plane glass plate filled with the liquid instead of air then
A : Diameter of rings increases
B : Diameter of rings decreases
C : Diameter of rings does not change
D : All above are correct
Q.no 33. For an infinitely deep 1 dimentional potential well, a quantum particle in the ground state is likely to be found
A : at one corner of the well
B : At 1/4th and 3/4th distance from one end of the well
C : At every point in the well with equal probability
D : At the center of the well
Q.no 34. Fringe width is defined as the distance between two consecutive
A : Crests
B : Bright fringes only
C : Dark fringes only
D : Bright or dark fringes
Q.no 35. A path difference of 3λ/2 between the two waves corresponds to the phase difference
A : 3π/2
B : π/3
C : 3π
D : 2π/3
Q.no 36. ln Magnetostriction Oscillator
A : a copper rod is used
B : a nickel rod is used
C : a magnesium rod is used
D : an aluminium rod is used
Q.no 37. What happens to O-ray and E-ray if they travel along the optic axis?
A : E-ray travels faster than O-ray
B : O-ray travels faster than E-ray
C : Both ray travels with same velocity
D : None of the above
Q.no 38. In Newton's rings the central spot is
A : Always bright
B : Always dark
C : Can be bright or dark
D : Of blue colour
Q.no 39. Depletion layer consists of
A : electrons
B : mobile ions
C : protons.
D : immobile ions
Q.no 40. At 0 K, intrinsic semiconductor behaves as
A : a perfect conductor
B : a super conductor
C : a semiconductor
D : a perfect insulator
Q.no 41. The main principle of optical fiber is
A : total internal dispersion
B : total internal reflection
C : total internal refraction
D : none of the above
Q.no 42. De Broglie wave is expresssed in terms of Ψ. What is Ψ?
A : It is the energy of particles producing matter waves
B : It is the momentum of particles producing matter waves
C : It is the uncertainity in position of particles producing matter waves
D : It represents the oscillations of quantity that produces matter waves.
Q.no 43. When the temperature of n- type semiconductor is increased
A : net negative charge increases
B : minority carriers decreases
C : electron-hole pairs increases
D : none of the above
Q.no 44. For the Solar cell the ratio of maximum power delivered to ideal power is called as
A : Efficiency
B : Fill factor
C : short-circuit
D : Open-circuit
Q.no 45. Photovoltaic cells convert light energy into
A : solar energy
B : electrical energy
C : mechanical energy
D : kinetic energy
Q.no 46. In the P-type semiconductor, the hole concentration in valence band is----------- than the electron concentration in conduction band.
A : less than
B : greater than
C : equal to
D : all of these
Q.no 47. The expression for the thickness of a half-wave plate of positive crystal is
A : t = λ / (μe - μo )
B : t = λ / 2(μe - μo )
C : t = λ / 3(μe - μo )
D : t = λ /2 (μo – μe )
Q.no 48. Ψ is called the wave function of the particle. If |Ψ|2 is 0.1, the probability of finding the particle at a given location at a given time is
A : 0.1
B : (0.1)2
C : (0.1)1/2
D : None of these
Q.no 49. Which of the following cannot be polarized?
A : Radio waves
B : Sound waves
C : Light waves
D : X-rays
Q.no 50. According to the Malu’s law, the intensity of polarized light emerging through the analyzer varies as
A : I =Iₒ cosθ
B : I =Iₒ/cos2θ
C : I =Iₒ / cos²θ
D : I =Iₒ cos²θ
Q.no 51. When a ray is reflected from denser medium, its phase changes by(in radian)
A : 0
B : π
C : 2π
D : 3π
Q.no 52. LASER is a short form of
A : Light attenuation by stimulated emission of radiation
B : Light amplification by stimulated emission of radiation
C : Light absorption by stimulated emission of radiation
D : Light absorption by spontaneous emission of radiation
Q.no 53. Bending of light around the straight edge of obstacle and spreading into its geometrical shadow is called as
A : Diffraction
B : Interference
C : Polarization
D : Dispersion
Q.no 54. If ne & nh are the number of electrons & holes in a semiconductor heavily doped with phosphorus, then
A : ne»nh
B : ne <nh
C : ne«nh
D : ne =nh
Q.no 55. Plane polarized light can be produced by
A : Simple reflection
B : Pile of plates
C : Nicol’s prism
D : All of these
Q.no 56. The basic principle of holography is
A : to create the interference pattern of object wave only
B : to create the interference pattern of reference wave only
C : to create the interference pattern of object wave and reference wave
D : none of the above
Q.no 57. The concept of wave function is insufficient to tell about probability of particle because
A : Wave function is negative at places of negative amplitude. Thus probability would come out to be negative which is meaningless.
B : Wave function is not single valued
C : Wave function is continuous. Ψ could have been considered as the sufficient function if it had been discontinuous.
D : Wave function directlty gives the uncertainty in position and not the probability.
Q.no 58. Matter waves are associated with
A : Positively charged particles
B : Negatively charged particles
C : Neutral particles
D : All of these
Q.no 59. Heisenberg Uncertainty Principle is not significant for daily life objects because
A : The value of Planck's constant is insignificant for these particles
B : It is difficult to observe wave particle duality in daily life objects
C : Daily life objects are macroscopic
D : All of these
Q.no 60. The effective path or phase difference between the reflected rays for antirefiection films
A : λ/4 or π/2
B : λ or π/2
C : λ/2 or π
D : 2λor π/2
Answer for Question No 1. is a
Answer for Question No 2. is c
Answer for Question No 3. is b
Answer for Question No 4. is a
Answer for Question No 5. is d
Answer for Question No 6. is c
Answer for Question No 7. is d
Answer for Question No 8. is c
Answer for Question No 9. is b
Answer for Question No 10. is c
Answer for Question No 11. is b
Answer for Question No 12. is a
Answer for Question No 13. is b
Answer for Question No 14. is a
Answer for Question No 15. is b
Answer for Question No 16. is c
Answer for Question No 17. is b
Answer for Question No 18. is b
Answer for Question No 19. is b
Answer for Question No 20. is d
Answer for Question No 21. is b
Answer for Question No 22. is d
Answer for Question No 23. is c
Answer for Question No 24. is a
Answer for Question No 25. is a
Answer for Question No 26. is d
Answer for Question No 27. is a
Answer for Question No 28. is b
Answer for Question No 29. is c
Answer for Question No 30. is c
Answer for Question No 31. is d
Answer for Question No 32. is b
Answer for Question No 33. is d
Answer for Question No 34. is d
Answer for Question No 35. is c
Answer for Question No 36. is b
Answer for Question No 37. is c
Answer for Question No 38. is b
Answer for Question No 39. is d
Answer for Question No 40. is d
Answer for Question No 41. is b
Answer for Question No 42. is d
Answer for Question No 43. is c
Answer for Question No 44. is b
Answer for Question No 45. is b
Answer for Question No 46. is b
Answer for Question No 47. is b
Answer for Question No 48. is a
Answer for Question No 49. is b
Answer for Question No 50. is d
Answer for Question No 51. is b
Answer for Question No 52. is b
Answer for Question No 53. is a
Answer for Question No 54. is a
Answer for Question No 55. is d
Answer for Question No 56. is c
Answer for Question No 57. is a
Answer for Question No 58. is d
Answer for Question No 59. is d
Answer for Question No 60. is c
Seat No -
Total number of questions : 60
1000499 T1 ENGINEERING PHYSICS
Time : 1hr
Max Marks : 50
N.B
1) All questions are Multiple Choice Questions having single correct option.
2) Attempt any 50 questions out of 60.
3) Use of calculator is allowed.
4) Each question carries 1 Mark.
5) Specially abled students are allowed 20 minutes extra for examination.
6) Do not use pencils to darken answer.
7) Use only black/blue ball point pen to darken the appropriate circle.
8) No change will be allowed once the answer is marked on OMR Sheet.
9) Rough work shall not be done on OMR sheet or on question paper.
10) Darken ONLY ONE CIRCLE for each answer.
Q.no 1. Fringe width is defined as the distance between two consecutive
A : Crests
B : Bright fringes only
C : Dark fringes only
D : Bright or dark fringes
Q.no 2. To check the optical flatness of the surface in wedge-shape thin film fringe-width must be
A : Equal, straight
B : Unequal, straight
C : Unequal, curved
D : Equal, curved
Q.no 3. Sound travel in the form of
A : longitudinal
B : transverse
C : mechanical
D : Infrasonic waves
Q.no 4. What would be true for wavelengths of De Broglie waves
A : λ (electron) = λ (proton)
B : λ (electron) > λ (proton)
C : λ (electron) < λ (proton)
D : λ (electron) ~ λ (proton)
Q.no 5. According to de Broglie hypothesis equation λ=h/p is applicable for
A : Matter particle only
B : Photons only
C : Both matter particle and photon
D : All options are correct
Q.no 6. The walls of the hall built for music concerns should
A : Amplify sound
B : Reflect sound
C : Transmit sound
D : D Absorb sound
Q.no 7. Nanotechnology is the science of designing,creating and using the materials in which atleast one dimension has a size in the range of
A : 1nm-100nm
B : 0.01nm to 0.1 nm
C : 100 nm- 1000nm
D : 30- 50 nm
Q.no 8. The battery connection required to forward bias a p-n junction are
A : +ve terminal to p and —ve terminal to n
B : -ve terminal to p and —ve terminal to n
C : -ve terminal to p and +ve terminal to n
D : none of the above
Q.no 9. Ultrasonic waves are produced by
A : piezoelectric effect
B : Doppler effect
C : Peltier effect
D : magneto-optic effect
Q.no 10. If the material is reduced to nano size then properties of those materials _____________ from those of the bulk material
A : slightly differ
B : drastically differ
C : remain same
D : can’t say
Q.no 11. The superconducting State is perfectly _ _ _ _ _ in nature.
A : Diamagnetic
B : Paramagnetic
C : Ferromagnetic
D : All above
Q.no 12. When the size of the material is reduced to size in nano region, the energy band structure undergo______________which mainly accounts for the change in the properties of nanoparticles
A : Small variations
B : large variations
C : Splitting
D : scattering
Q.no 13. Laevo-rotatory optically active substance rotates the plane of vibrations
A : In clockwise direction
B : In left hand side
C : By 1800
D : None of the above
Q.no 14. The phenomena of the echo is used to measure the
A : length of metal
B : flaws in metal
C : transfer signals
D : none
Q.no 15. Wave function Ψ represents
A : Potential energy of particles producing matter waves
B : Oscillations of quantity that produces matter waves
C : Momentum of particles that produces matter waves
D : Kinetic energy of particles producing matter waves
Q.no 16. ln superconductivity, the conductivity of a material becomes.
A : zero
B : finite
C : infinite
D : None of the above
Q.no 17. In Newton's rings the central spot is
A : Always bright
B : Always dark
C : Can be bright or dark
D : Of blue colour
Q.no 18. Which of the following will remain unchanged when a sound wave travels in air or in water?
A : Amplitude
B : frequency
C : wavelength
D : Speed
Q.no 19. The active medium of a helium-neon laser is made up with ________ ratio of helium-neon.
A : 10:1
B : 10:3
C : 10:5
D : 10:6
Q.no 20. Reverberation time T of a hall varies is inversely proportional as the
A : density
B : degree of sensation
C : effective area
D : square of amplitude
Q.no 21. If ne & nh are the number of electrons & holes in a semiconductor heavily doped with phosphorus, then
A : ne»nh
B : ne <nh
C : ne«nh
D : ne =nh
Q.no 22. Principal maxima for fraunhoffer single slit diffraction is obtained at ѳ
A : nλ
B : (n/2)π
C : 1
D : 0
Q.no 23. In case of ruby laser, optical resonator cavity is formed by the silvered ends of
A : Ruby crystal
B : The Calcium crystal
C : Tourmaline crystal
D : Quartz crystal
Q.no 24. When a ray is reflected from denser medium, its phase changes by(in radian)
A : 0
B : π
C : 2π
D : 3π
Q.no 25. For an infinitely deep 1 dimentional potential well, a quantum particle in the ground state is likely to be found
A : at one corner of the well
B : At 1/4th and 3/4th distance from one end of the well
C : At every point in the well with equal probability
D : At the center of the well
Q.no 26. For the Solar cell the ratio of maximum power delivered to ideal power is called as
A : Efficiency
B : Fill factor
C : short-circuit
D : Open-circuit
Q.no 27. Photovoltaic cells convert light energy into
A : solar energy
B : electrical energy
C : mechanical energy
D : kinetic energy
Q.no 28. A hologram is most similar to a
A : Dispersion
B : prism
C : 3-D photograph
D : compound lens
Q.no 29. In Newton’s ring experiment ,with air as a medium between Plano convex lens and glass plate, diameter of nth dark ring is
A : √4nrλ
B : √4nr
C : √(2n-1)2rλ
D : √4nr/λ
Q.no 30. Which of the following when added as an impurity into the silicon produces N-type semiconductor?
A : P
B : B
C : Al
D : Mg
Q.no 31. Which is the correct relation for forbidden energy gap in conductor, semi-conductor and insulator?
A : ΔEg conductor > ΔEg semiconductor> ΔEginsulator
B : ΔEgconductor > ΔEginsulator > Δ Eg semiconductor
C : ΔEginsulator > Δ Eg semiconductor > ΔEgconductor
D : ΔEg semiconductor > Δ Egconductor > ΔEginsulator
Q.no 32. In an N-type semiconductor, donor level is
A : above the conduction band of the host
B : close to the conduction band of the host
C : close to the valence band of the host crystal.
D : below to the valence band of the host crystal
Q.no 33. ln Magnetostriction Oscillator
A : a copper rod is used
B : a nickel rod is used
C : a magnesium rod is used
D : an aluminium rod is used
Q.no 34. If the gap between plano- convex lens and plane glass plate filled with the liquid instead of air then
A : Diameter of rings increases
B : Diameter of rings decreases
C : Diameter of rings does not change
D : All above are correct
Q.no 35. __________ are used in sunscreen lotions to protect the skin from ultraviolet radiations
A : Zinc oxide and Titanium oxide nanoparticles
B : Talcum stone particles
C : Non-metal nanoparticles
D : Quantum dots
Q.no 36. Optimum reverberation time for music is
A : 0.5 sec
B : 0.1lsec
C : l.2sec
D : Above 5 sec
Q.no 37. In Newton’s ring experiment if the air film is replaced by water film, then the diameter of the ring
A : Decreases
B : Increases
C : Remains same
D : None of the above
Q.no 38. Loudness of sound is found to be proportional to the
A : log 10 L
B : log 10 I
C : area
D : log 10 s
Q.no 39. The light source used for optical pumping in Ruby laser is
A : Xenon
B : Argon
C : Neon
D : none of the above
Q.no 40. The Fermi level in intrinsic semiconductor lies exactly at the of the forbidden band
A : above
B : center
C : below
D : none of these
Q.no 41. In a semiconductor, current conduction is due to
A : only holes
B : both holes and free electrons
C : only free electrons
D : none of the above
Q.no 42. In a narrow wave packet of matter wave
A : The position of the particle cannot be determined accurately
B : The momentum of the particle cannot be determined accurately
C : Concept of wave group does not exist
D : Phase velocity is always zero
Q.no 43. The quarter wave plate produces
A : Path difference of λ/4 or phase difference of π /2 radians between O- and E-waves
B : Path difference of λ /2 or phase difference of π /2 radians
C : Path difference of λ /4 or phase difference of π radians
D : None of the above
Q.no 44. Intensity of diffraction at an angle ѳ for fraunhoffer diffraction by grating is given by Iѳ
A : (sinNβ/ sinβ)
B : (sinβ)2
C : (sinα/α)2
D : Im(sinα/α)2 (sinNβ/ sinβ)2
Q.no 45. On reverse biasing the P-N junction,its depletion region becomes
A : narrow
B : zero
C : broad
D : constant
Q.no 46. The normalization condition indicates that probabilities of finding the particle
A : in a small volume summed up over the entire space must give 1
B : in a small volume must give 1
C : in a small volume summed up along the positive direction must give 1
D : in a small volume summed up along the negative direction must give 1
Q.no 47. When two semiconductors of p-type & n-type are brought in contact with each other, the P-N junction formed behaves like
A : an oscillator
B : an amplifier
C : a diode
D : a conductor
Q.no 48. The forbidden energy gap in an insulator is of the order of
A : 1 eV
B : 2 eV
C : 0.1 eV
D : 5 eV
Q.no 49. A path difference of 3λ/2 between the two waves corresponds to the phase difference
A : 3π/2
B : π/3
C : 3π
D : 2π/3
Q.no 50. piezoelectric effect has been observed in
A : nickel
B : glass
C : quartz
D : mica
Q.no 51. The speed of sound in medium depends upon
A : Amplitude
B : frequency
C : wavelength
D : properties of the medium
Q.no 52. For constructive interference the path difference should be
A : Zero or odd multiple of wavelength
B : Only integral multiple of wavelength
C : 0
D : Zero or integral multiple of wavelength
Q.no 53. The phenomenon in which the magnetic line of force are expelled out of the superconducting material at Critical temperature is called.
A : isotopic effect
B : Meissner effect
C : BCS * theory
D : London theory
Q.no 54. The points of constructive interference of light are
A : May be bright or dark
B : Always bright
C : Always dark
D : Neighter bight nor dark
Q.no 55. Sound intensity is
A : energy/time
B : wb/m3
C : watt/m2
D : energy/time. area
Q.no 56. Velocity of sound wave is given by
A : v = f/λ
B : v = f.λ
C : v =λ/f
D : v = f/T
Q.no 57. The concept of wave function is insufficient to tell about probability of particle because
A : Wave function is negative at places of negative amplitude. Thus probability would come out to be negative which is meaningless.
B : Wave function is not single valued
C : Wave function is continuous. Ψ could have been considered as the sufficient function if it had been discontinuous.
D : Wave function directlty gives the uncertainty in position and not the probability.
Q.no 58. The effective path or phase difference between the reflected rays for antirefiection films
A : λ/4 or π/2
B : λ or π/2
C : λ/2 or π
D : 2λor π/2
Q.no 59. The basic principle of holography is
A : to create the interference pattern of object wave only
B : to create the interference pattern of reference wave only
C : to create the interference pattern of object wave and reference wave
D : none of the above
Q.no 60. An echo is heard when direct sound waves coming from the source and its reflected wave reach the listener with a time interval of about
A : 1/14 seconds
B : 1/3 seconds
C : 1/7 seconds
D : 1/19 seconds
Answer for Question No 1. is d
Answer for Question No 2. is a
Answer for Question No 3. is a
Answer for Question No 4. is b
Answer for Question No 5. is c
Answer for Question No 6. is d
Answer for Question No 7. is a
Answer for Question No 8. is a
Answer for Question No 9. is a
Answer for Question No 10. is b
Answer for Question No 11. is a
Answer for Question No 12. is b
Answer for Question No 13. is b
Answer for Question No 14. is b
Answer for Question No 15. is b
Answer for Question No 16. is c
Answer for Question No 17. is b
Answer for Question No 18. is b
Answer for Question No 19. is a
Answer for Question No 20. is c
Answer for Question No 21. is a
Answer for Question No 22. is d
Answer for Question No 23. is a
Answer for Question No 24. is b
Answer for Question No 25. is d
Answer for Question No 26. is b
Answer for Question No 27. is b
Answer for Question No 28. is c
Answer for Question No 29. is a
Answer for Question No 30. is a
Answer for Question No 31. is c
Answer for Question No 32. is b
Answer for Question No 33. is b
Answer for Question No 34. is b
Answer for Question No 35. is a
Answer for Question No 36. is c
Answer for Question No 37. is a
Answer for Question No 38. is b
Answer for Question No 39. is a
Answer for Question No 40. is b
Answer for Question No 41. is c
Answer for Question No 42. is b
Answer for Question No 43. is a
Answer for Question No 44. is d
Answer for Question No 45. is c
Answer for Question No 46. is a
Answer for Question No 47. is c
Answer for Question No 48. is d
Answer for Question No 49. is c
Answer for Question No 50. is c
Answer for Question No 51. is d
Answer for Question No 52. is d
Answer for Question No 53. is b
Answer for Question No 54. is b
Answer for Question No 55. is d
Answer for Question No 56. is b
Answer for Question No 57. is a
Answer for Question No 58. is c
Answer for Question No 59. is c
Answer for Question No 60. is c
Seat No -
Total number of questions : 60
1000499 T1 ENGINEERING PHYSICS
Time : 1hr
Max Marks : 50
N.B
1) All questions are Multiple Choice Questions having single correct option.
2) Attempt any 50 questions out of 60.
3) Use of calculator is allowed.
4) Each question carries 1 Mark.
5) Specially abled students are allowed 20 minutes extra for examination.
6) Do not use pencils to darken answer.
7) Use only black/blue ball point pen to darken the appropriate circle.
8) No change will be allowed once the answer is marked on OMR Sheet.
9) Rough work shall not be done on OMR sheet or on question paper.
10) Darken ONLY ONE CIRCLE for each answer.
Q.no 1. The current in a superconductor produces
A : zero, voltage drop across it
B : a strong, electric field around it
C : a small voltage drop across it
D : a large voltage drop across it
Q.no 2. In the Fresnel diffraction the incident wave front is
A : Spherical
B : Cylindrical
C : Spherical or cylindrical
D : Plane
Q.no 3. A hologram is most similar to a
A : Dispersion
B : prism
C : 3-D photograph
D : compound lens
Q.no 4. What happens to O-ray and E-ray if they travel along the optic axis?
A : E-ray travels faster than O-ray
B : O-ray travels faster than E-ray
C : Both ray travels with same velocity
D : None of the above
Q.no 5. If ne & nh are the number of electrons & holes in a semiconductor heavily doped with phosphorus, then
A : ne»nh
B : ne <nh
C : ne«nh
D : ne =nh
Q.no 6. ln superconductivity, the conductivity of a material becomes.
A : zero
B : finite
C : infinite
D : None of the above
Q.no 7. Principal maxima for fraunhoffer single slit diffraction is obtained at ѳ
A : nλ
B : (n/2)π
C : 1
D : 0
Q.no 8. In Newton’s ring experiment if the air film is replaced by water film, then the diameter of the ring
A : Decreases
B : Increases
C : Remains same
D : None of the above
Q.no 9. When the temperature of n- type semiconductor is increased
A : net negative charge increases
B : minority carriers decreases
C : electron-hole pairs increases
D : none of the above
Q.no 10. Optimum reverberation time for music is
A : 0.5 sec
B : 0.1lsec
C : l.2sec
D : Above 5 sec
Q.no 11. We prefer Polaroid sunglasses because they
A : have soothing colours
B : reduce the intensity of light
C : are cheaper
D : can change colour
Q.no 12. Sound travel in the form of
A : longitudinal
B : transverse
C : mechanical
D : Infrasonic waves
Q.no 13. The temperature at which conductivity of material becomes infinite is called.
A : Critical temperature
B : absolute temperature
C : Mean temperature
D : Crystallization temperature
Q.no 14. The points of constructive interference of light are
A : May be bright or dark
B : Always bright
C : Always dark
D : Neighter bight nor dark
Q.no 15. The speed of sound in medium depends upon
A : Amplitude
B : frequency
C : wavelength
D : properties of the medium
Q.no 16. On reverse biasing the P-N junction,its depletion region becomes
A : narrow
B : zero
C : broad
D : constant
Q.no 17. When a ray is reflected from denser medium, its phase changes by(in radian)
A : 0
B : π
C : 2π
D : 3π
Q.no 18. The forbidden energy gap in an insulator is of the order of
A : 1 eV
B : 2 eV
C : 0.1 eV
D : 5 eV
Q.no 19. Types - l superconductors are ___________ temperature superconductor.
A : low
B : absolute
C : High
D : None of the Above
Q.no 20. Reverberation time T of a hall varies is inversely proportional as the
A : density
B : degree of sensation
C : effective area
D : square of amplitude
Q.no 21. Bending of light around the straight edge of obstacle and spreading into its geometrical shadow is called as
A : Diffraction
B : Interference
C : Polarization
D : Dispersion
Q.no 22. Which of the following when added as an impurity into the silicon produces N-type semiconductor?
A : P
B : B
C : Al
D : Mg
Q.no 23. Depth sounding technique is based on principle of
A : Cavitations
B : navigation
C : reflection
D : echo sounding
Q.no 24. Reverse bias applied on a junction diode-----------
A : raises the potential barrier
B : decrease the minority carrier current
C : increases the majority carrier current
D : lowers the potential barrier
Q.no 25. According to de Broglie hypothesis
A : A particle in rest has matter waves associated with it
B : A particle at rest or in motion has matter wave associated with it
C : A particle in motion has matter wave associated with it
D : All above statements are correct
Q.no 26. The normalization condition indicates that probabilities of finding the particle
A : in a small volume summed up over the entire space must give 1
B : in a small volume must give 1
C : in a small volume summed up along the positive direction must give 1
D : in a small volume summed up along the negative direction must give 1
Q.no 27. The main principle of optical fiber is
A : total internal dispersion
B : total internal reflection
C : total internal refraction
D : none of the above
Q.no 28. For constructive interference the path difference should be
A : Zero or odd multiple of wavelength
B : Only integral multiple of wavelength
C : 0
D : Zero or integral multiple of wavelength
Q.no 29. The battery connection required to forward bias a p-n junction are
A : +ve terminal to p and —ve terminal to n
B : -ve terminal to p and —ve terminal to n
C : -ve terminal to p and +ve terminal to n
D : none of the above
Q.no 30. ln Magnetostriction Oscillator
A : a copper rod is used
B : a nickel rod is used
C : a magnesium rod is used
D : an aluminium rod is used
Q.no 31. Nanotechnology is the science of designing,creating and using the materials in which atleast one dimension has a size in the range of
A : 1nm-100nm
B : 0.01nm to 0.1 nm
C : 100 nm- 1000nm
D : 30- 50 nm
Q.no 32. Which is the correct relation for forbidden energy gap in conductor, semi-conductor and insulator?
A : ΔEg conductor > ΔEg semiconductor> ΔEginsulator
B : ΔEgconductor > ΔEginsulator > Δ Eg semiconductor
C : ΔEginsulator > Δ Eg semiconductor > ΔEgconductor
D : ΔEg semiconductor > Δ Egconductor > ΔEginsulator
Q.no 33. Sound intensity is
A : energy/time
B : wb/m3
C : watt/m2
D : energy/time. area
Q.no 34. The light source used for optical pumping in Ruby laser is
A : Xenon
B : Argon
C : Neon
D : none of the above
Q.no 35. Superconductivity was first observed by
A : Volta
B : Meissner
C : Kamerling Onnes
D : Schrieffer
Q.no 36. In case of ruby laser, optical resonator cavity is formed by the silvered ends of
A : Ruby crystal
B : The Calcium crystal
C : Tourmaline crystal
D : Quartz crystal
Q.no 37. For the wavefunction to be true or acceptable, the following conditions are to be followed by it
A : Continuous
B : Finite
C : Normalizable
D : All of these
Q.no 38. In a narrow wave packet of matter wave
A : The position of the particle cannot be determined accurately
B : The momentum of the particle cannot be determined accurately
C : Concept of wave group does not exist
D : Phase velocity is always zero
Q.no 39. When the size of the material reduces, the surface area to volume ratio ________
A : decreases
B : Increases
C : remains same
D : becomes exactly equal to the volume
Q.no 40. Sound waves of frequency less than 20 Hz are called
A : longitudinal wave
B : ultrasonic wave
C : Infrasonic waves
D : mechanical wave
Q.no 41. Ultrasonic waves are produced by
A : piezoelectric effect
B : Doppler effect
C : Peltier effect
D : magneto-optic effect
Q.no 42. n type & p type silicon can be obtained by doping pure silicon with
A : Arsenic & Phosphorus
B : Indium & Aluminum
C : Phosphorus & Indium
D : Aluminum & Boron
Q.no 43. The characteristics of laser beam are
A : Highly directional
B : Highly intense
C : Highly monochromatic
D : All of these
Q.no 44. Heisenberg Uncertainty Principle is significant for subatomic particles because
A : Their energy is small
B : They show wave particle duality
C : Their velocity is small
D : They show photoelectric effect
Q.no 45. At the critical temperature and less than critical temperature the resistance of a superconductor.
A : increase rapidly
B : decrease rapidly
C : remains zero
D : increase slowly
Q.no 46. For an infinitely deep 1 dimentional potential well, a quantum particle in the ground state is likely to be found
A : at one corner of the well
B : At 1/4th and 3/4th distance from one end of the well
C : At every point in the well with equal probability
D : At the center of the well
Q.no 47. Laser action is possible only if there is
A : a set of reflecting mirrors
B : a black body
C : population inversion
D : oscillations of laser source
Q.no 48. Loudness of sound is found to be proportional to the
A : log 10 L
B : log 10 I
C : area
D : log 10 s
Q.no 49. In Fraunhoffer diffraction distance of slit from source and screen is
A : finite
B : infinite
C : parallel
D : not equal
Q.no 50. Which of the following will remain unchanged when a sound wave travels in air or in water?
A : Amplitude
B : frequency
C : wavelength
D : Speed
Q.no 51. The intensity level expressed in a unit
A : bel
B : 10-12W/m2
C : Newton
D : db/m
Q.no 52. Plane polarized light has vibrations
A : In one direction perpendicular to direction of propagation
B : Along the direction of propagation
C : In two directions perpendicular to direction of propagation
D : In all directions perpendicular to direction of propagation
Q.no 53. The superconducting State is perfectly _ _ _ _ _ in nature.
A : Diamagnetic
B : Paramagnetic
C : Ferromagnetic
D : All above
Q.no 54. If the gap between plano- convex lens and plane glass plate filled with the liquid instead of air then
A : Diameter of rings increases
B : Diameter of rings decreases
C : Diameter of rings does not change
D : All above are correct
Q.no 55. In forward bias, the width of depletion region in a p-n junction diode
A : increases
B : decreases
C : remains constant
D : first (A) then (B)
Q.no 56. Ultrasonic are sound waves having frequency greater than
A : 20 MHz
B : 20 kHz
C : 20GHz
D : 20 Hz
Q.no 57. The name given to the unit of sound absorption is-
A : decibel
B : degree
C : sabine
D : watt
Q.no 58. Matter waves are associated with
A : Positively charged particles
B : Negatively charged particles
C : Neutral particles
D : All of these
Q.no 59. Heisenberg Uncertainty Principle is not significant for daily life objects because
A : The value of Planck's constant is insignificant for these particles
B : It is difficult to observe wave particle duality in daily life objects
C : Daily life objects are macroscopic
D : All of these
Q.no 60. Schrodinger's equation is required for explaining behavior of subatomic particles because
A : Subatomic particles show wave particle duality
B : Matter wave is associated with subatomic waves
C : Newton's laws of motion cannot be applied to matter waves
D : All options are correct
Answer for Question No 1. is a
Answer for Question No 2. is a
Answer for Question No 3. is c
Answer for Question No 4. is c
Answer for Question No 5. is a
Answer for Question No 6. is c
Answer for Question No 7. is d
Answer for Question No 8. is a
Answer for Question No 9. is c
Answer for Question No 10. is c
Answer for Question No 11. is b
Answer for Question No 12. is a
Answer for Question No 13. is a
Answer for Question No 14. is b
Answer for Question No 15. is d
Answer for Question No 16. is c
Answer for Question No 17. is b
Answer for Question No 18. is d
Answer for Question No 19. is a
Answer for Question No 20. is c
Answer for Question No 21. is a
Answer for Question No 22. is a
Answer for Question No 23. is d
Answer for Question No 24. is a
Answer for Question No 25. is c
Answer for Question No 26. is a
Answer for Question No 27. is b
Answer for Question No 28. is d
Answer for Question No 29. is a
Answer for Question No 30. is b
Answer for Question No 31. is a
Answer for Question No 32. is c
Answer for Question No 33. is d
Answer for Question No 34. is a
Answer for Question No 35. is a
Answer for Question No 36. is a
Answer for Question No 37. is d
Answer for Question No 38. is b
Answer for Question No 39. is b
Answer for Question No 40. is c
Answer for Question No 41. is a
Answer for Question No 42. is c
Answer for Question No 43. is d
Answer for Question No 44. is b
Answer for Question No 45. is c
Answer for Question No 46. is d
Answer for Question No 47. is c
Answer for Question No 48. is b
Answer for Question No 49. is b
Answer for Question No 50. is b
Answer for Question No 51. is a
Answer for Question No 52. is a
Answer for Question No 53. is a
Answer for Question No 54. is b
Answer for Question No 55. is b
Answer for Question No 56. is b
Answer for Question No 57. is c
Answer for Question No 58. is d
Answer for Question No 59. is d
Answer for Question No 60. is d
Seat No -
Total number of questions : 60
1000499 T1 ENGINEERING PHYSICS
Time : 1hr
Max Marks : 50
N.B
1) All questions are Multiple Choice Questions having single correct option.
2) Attempt any 50 questions out of 60.
3) Use of calculator is allowed.
4) Each question carries 1 Mark.
5) Specially abled students are allowed 20 minutes extra for examination.
6) Do not use pencils to darken answer.
7) Use only black/blue ball point pen to darken the appropriate circle.
8) No change will be allowed once the answer is marked on OMR Sheet.
9) Rough work shall not be done on OMR sheet or on question paper.
10) Darken ONLY ONE CIRCLE for each answer.
Q.no 1. When a ray is reflected from denser medium, its phase changes by(in radian)
A : 0
B : π
C : 2π
D : 3π
Q.no 2. Effective path difference between two successive reflected rays by thin parallel film is
A : 2μtcosr+ λ/2
B : 0
C : 2μtcosr
D : 2μtcosr+n λ
Q.no 3. According to the Malu’s law, the intensity of polarized light emerging through the analyzer varies as
A : I =Iₒ cosθ
B : I =Iₒ/cos2θ
C : I =Iₒ / cos²θ
D : I =Iₒ cos²θ
Q.no 4. Ultrasonic waves are produced by
A : piezoelectric effect
B : Doppler effect
C : Peltier effect
D : magneto-optic effect
Q.no 5. Data storage capacities of hard disks and have led to small and faster microprocessors due to the use of ______________
A : Nanosized electronic components
B : Pure semiconductors
C : Capacitive components
D : Inductive components
Q.no 6. Laser action is possible only if there is
A : a set of reflecting mirrors
B : a black body
C : population inversion
D : oscillations of laser source
Q.no 7. The battery connection required to forward bias a p-n junction are
A : +ve terminal to p and —ve terminal to n
B : -ve terminal to p and —ve terminal to n
C : -ve terminal to p and +ve terminal to n
D : none of the above
Q.no 8. The light source used for optical pumping in Ruby laser is
A : Xenon
B : Argon
C : Neon
D : none of the above
Q.no 9. According to de Broglie hypothesis
A : A particle in rest has matter waves associated with it
B : A particle at rest or in motion has matter wave associated with it
C : A particle in motion has matter wave associated with it
D : All above statements are correct
Q.no 10. Ψ is called the wave function of the particle. If |Ψ|2 is 0.1, the probability of finding the particle at a given location at a given time is
A : 0.1
B : (0.1)2
C : (0.1)1/2
D : None of these
Q.no 11. A hologram is most similar to a
A : Dispersion
B : prism
C : 3-D photograph
D : compound lens
Q.no 12. If ne & nh are the number of electrons & holes in a semiconductor heavily doped with phosphorus, then
A : ne»nh
B : ne <nh
C : ne«nh
D : ne =nh
Q.no 13. The Cooper pairs are electron pairs with
A : equal and same momentum
B : Unequal & same spin
C : Equal and opposite momentum and spin
D : Unequal & opposite spin and momentum
Q.no 14. Which is the correct relation for forbidden energy gap in conductor, semi-conductor and insulator?
A : ΔEg conductor > ΔEg semiconductor> ΔEginsulator
B : ΔEgconductor > ΔEginsulator > Δ Eg semiconductor
C : ΔEginsulator > Δ Eg semiconductor > ΔEgconductor
D : ΔEg semiconductor > Δ Egconductor > ΔEginsulator
Q.no 15. The intensity level expressed in a unit
A : bel
B : 10-12W/m2
C : Newton
D : db/m
Q.no 16. The superconducting State is perfectly _ _ _ _ _ in nature.
A : Diamagnetic
B : Paramagnetic
C : Ferromagnetic
D : All above
Q.no 17. The walls of the hall built for music concerns should
A : Amplify sound
B : Reflect sound
C : Transmit sound
D : D Absorb sound
Q.no 18. The minimum amount of current passed through the body of superconducter in order of destroy the superconductivity is called.
A : induced current
B : Critical current
C : Eddy current
D : super current
Q.no 19. Which of the following will remain unchanged when a sound wave travels in air or in water?
A : Amplitude
B : frequency
C : wavelength
D : Speed
Q.no 20. In a narrow wave packet of matter wave
A : The position of the particle cannot be determined accurately
B : The momentum of the particle cannot be determined accurately
C : Concept of wave group does not exist
D : Phase velocity is always zero
Q.no 21. At 0 K, intrinsic semiconductor behaves as
A : a perfect conductor
B : a super conductor
C : a semiconductor
D : a perfect insulator
Q.no 22. When the size of the material reduces, the surface area to volume ratio ________
A : decreases
B : Increases
C : remains same
D : becomes exactly equal to the volume
Q.no 23. Quantum mechanically, minimum energy of a particle enclosed in a potential well cannot be
A : 1 eV
B : zero
C : 100 eV
D : 1 KeV
Q.no 24. Which of the following when added as an impurity into the silicon produces N-type semiconductor?
A : P
B : B
C : Al
D : Mg
Q.no 25. The quarter wave plate produces
A : Path difference of λ/4 or phase difference of π /2 radians between O- and E-waves
B : Path difference of λ /2 or phase difference of π /2 radians
C : Path difference of λ /4 or phase difference of π radians
D : None of the above
Q.no 26. Reverberation time T of a hall varies is inversely proportional as the
A : density
B : degree of sensation
C : effective area
D : square of amplitude
Q.no 27. Photovoltaic cells convert light energy into
A : solar energy
B : electrical energy
C : mechanical energy
D : kinetic energy
Q.no 28. The normalization condition indicates that probabilities of finding the particle
A : in a small volume summed up over the entire space must give 1
B : in a small volume must give 1
C : in a small volume summed up along the positive direction must give 1
D : in a small volume summed up along the negative direction must give 1
Q.no 29. Pumping process used in diode laser is
A : optical pumping
B : forward biased voltage
C : electrical discharge
D : none of these
Q.no 30. The active medium of a helium-neon laser is made up with ________ ratio of helium-neon.
A : 10:1
B : 10:3
C : 10:5
D : 10:6
Q.no 31. What would be true for wavelengths of De Broglie waves
A : λ (electron) = λ (proton)
B : λ (electron) > λ (proton)
C : λ (electron) < λ (proton)
D : λ (electron) ~ λ (proton)
Q.no 32. Loudness of sound is found to be proportional to the
A : log 10 L
B : log 10 I
C : area
D : log 10 s
Q.no 33. If the gap between plano- convex lens and plane glass plate filled with the liquid instead of air then
A : Diameter of rings increases
B : Diameter of rings decreases
C : Diameter of rings does not change
D : All above are correct
Q.no 34. Plane polarized light has vibrations
A : In one direction perpendicular to direction of propagation
B : Along the direction of propagation
C : In two directions perpendicular to direction of propagation
D : In all directions perpendicular to direction of propagation
Q.no 35. Principal maxima for fraunhoffer single slit diffraction is obtained at ѳ
A : nλ
B : (n/2)π
C : 1
D : 0
Q.no 36. ln superconductivity, the conductivity of a material becomes.
A : zero
B : finite
C : infinite
D : None of the above
Q.no 37. Laevo-rotatory optically active substance rotates the plane of vibrations
A : In clockwise direction
B : In left hand side
C : By 1800
D : None of the above
Q.no 38. A path difference of 3λ/2 between the two waves corresponds to the phase difference
A : 3π/2
B : π/3
C : 3π
D : 2π/3
Q.no 39. The expression for the thickness of a half-wave plate of positive crystal is
A : t = λ / (μe - μo )
B : t = λ / 2(μe - μo )
C : t = λ / 3(μe - μo )
D : t = λ /2 (μo – μe )
Q.no 40. n type & p type silicon can be obtained by doping pure silicon with
A : Arsenic & Phosphorus
B : Indium & Aluminum
C : Phosphorus & Indium
D : Aluminum & Boron
Q.no 41. In the P-type semiconductor, the hole concentration in valence band is----------- than the electron concentration in conduction band.
A : less than
B : greater than
C : equal to
D : all of these
Q.no 42. For the wavefunction to be true or acceptable, the following conditions are to be followed by it
A : Continuous
B : Finite
C : Normalizable
D : All of these
Q.no 43. Depth sounding technique is based on principle of
A : Cavitations
B : navigation
C : reflection
D : echo sounding
Q.no 44. We prefer Polaroid sunglasses because they
A : have soothing colours
B : reduce the intensity of light
C : are cheaper
D : can change colour
Q.no 45. ln Magnetostriction Oscillator
A : a copper rod is used
B : a nickel rod is used
C : a magnesium rod is used
D : an aluminium rod is used
Q.no 46. piezoelectric effect has been observed in
A : nickel
B : glass
C : quartz
D : mica
Q.no 47. Plane polarized light can be produced by
A : Simple reflection
B : Pile of plates
C : Nicol’s prism
D : All of these
Q.no 48. The intensity of central bright band in the case of diffraction is
A : maximum
B : minimum
C : varies between max to min
D : none of above
Q.no 49. In an N-type semiconductor, donor level is
A : above the conduction band of the host
B : close to the conduction band of the host
C : close to the valence band of the host crystal.
D : below to the valence band of the host crystal
Q.no 50. Which of the following cannot be polarized?
A : Radio waves
B : Sound waves
C : Light waves
D : X-rays
Q.no 51. Superconductivity was first observed by
A : Volta
B : Meissner
C : Kamerling Onnes
D : Schrieffer
Q.no 52. In Newton’s ring experiment if the air film is replaced by water film, then the diameter of the ring
A : Decreases
B : Increases
C : Remains same
D : None of the above
Q.no 53. The impurity level in an extrinsic semiconductor is about of pure semiconductor
A : 10 atoms for 103 atoms
B : 10 atoms for 102 atoms
C : 1 atoms for 108 atoms
D : 1 atoms for 100 atom
Q.no 54. At the critical temperature and less than critical temperature the resistance of a superconductor.
A : increase rapidly
B : decrease rapidly
C : remains zero
D : increase slowly
Q.no 55. On reverse biasing the P-N junction,its depletion region becomes
A : narrow
B : zero
C : broad
D : constant
Q.no 56. Ultrasonic are sound waves having frequency greater than
A : 20 MHz
B : 20 kHz
C : 20GHz
D : 20 Hz
Q.no 57. Velocity of sound wave is given by
A : v = f/λ
B : v = f.λ
C : v =λ/f
D : v = f/T
Q.no 58. The reverberation time is the time required for the intensity to drop by
A : 30dB
B : 90dB
C : C 60dB
D : 120dB
Q.no 59. An echo is heard when direct sound waves coming from the source and its reflected wave reach the listener with a time interval of about
A : 1/14 seconds
B : 1/3 seconds
C : 1/7 seconds
D : 1/19 seconds
Q.no 60. Heisenberg Uncertainty Principle is not significant for daily life objects because
A : The value of Planck's constant is insignificant for these particles
B : It is difficult to observe wave particle duality in daily life objects
C : Daily life objects are macroscopic
D : All of these
Answer for Question No 1. is b
Answer for Question No 2. is a
Answer for Question No 3. is d
Answer for Question No 4. is a
Answer for Question No 5. is a
Answer for Question No 6. is c
Answer for Question No 7. is a
Answer for Question No 8. is a
Answer for Question No 9. is c
Answer for Question No 10. is a
Answer for Question No 11. is c
Answer for Question No 12. is a
Answer for Question No 13. is c
Answer for Question No 14. is c
Answer for Question No 15. is a
Answer for Question No 16. is a
Answer for Question No 17. is d
Answer for Question No 18. is b
Answer for Question No 19. is b
Answer for Question No 20. is b
Answer for Question No 21. is d
Answer for Question No 22. is b
Answer for Question No 23. is b
Answer for Question No 24. is a
Answer for Question No 25. is a
Answer for Question No 26. is c
Answer for Question No 27. is b
Answer for Question No 28. is a
Answer for Question No 29. is b
Answer for Question No 30. is a
Answer for Question No 31. is b
Answer for Question No 32. is b
Answer for Question No 33. is b
Answer for Question No 34. is a
Answer for Question No 35. is d
Answer for Question No 36. is c
Answer for Question No 37. is b
Answer for Question No 38. is c
Answer for Question No 39. is b
Answer for Question No 40. is c
Answer for Question No 41. is b
Answer for Question No 42. is d
Answer for Question No 43. is d
Answer for Question No 44. is b
Answer for Question No 45. is b
Answer for Question No 46. is c
Answer for Question No 47. is d
Answer for Question No 48. is a
Answer for Question No 49. is b
Answer for Question No 50. is b
Answer for Question No 51. is a
Answer for Question No 52. is a
Answer for Question No 53. is c
Answer for Question No 54. is c
Answer for Question No 55. is c
Answer for Question No 56. is b
Answer for Question No 57. is b
Answer for Question No 58. is c
Answer for Question No 59. is c
Answer for Question No 60. is d
Seat No -
Total number of questions : 60
1000499 T1 ENGINEERING PHYSICS
Time : 1hr
Max Marks : 50
N.B
1) All questions are Multiple Choice Questions having single correct option.
2) Attempt any 50 questions out of 60.
3) Use of calculator is allowed.
4) Each question carries 1 Mark.
5) Specially abled students are allowed 20 minutes extra for examination.
6) Do not use pencils to darken answer.
7) Use only black/blue ball point pen to darken the appropriate circle.
8) No change will be allowed once the answer is marked on OMR Sheet.
9) Rough work shall not be done on OMR sheet or on question paper.
10) Darken ONLY ONE CIRCLE for each answer.
Q.no 1. When a ray is reflected from denser medium, its phase changes by(in radian)
A : 0
B : π
C : 2π
D : 3π
Q.no 2. Reverse bias applied on a junction diode-----------
A : raises the potential barrier
B : decrease the minority carrier current
C : increases the majority carrier current
D : lowers the potential barrier
Q.no 3. __________ are used in sunscreen lotions to protect the skin from ultraviolet radiations
A : Zinc oxide and Titanium oxide nanoparticles
B : Talcum stone particles
C : Non-metal nanoparticles
D : Quantum dots
Q.no 4. Heisenberg Uncertainty Principle is significant for subatomic particles because
A : Their energy is small
B : They show wave particle duality
C : Their velocity is small
D : They show photoelectric effect
Q.no 5. When the size of the material is reduced to size in nano region, the energy band structure undergo______________which mainly accounts for the change in the properties of nanoparticles
A : Small variations
B : large variations
C : Splitting
D : scattering
Q.no 6. Matter waves would be more significant for particles having mass
A : About 10 x 103 g
B : About 10 x 10-14 g
C : About 10 x 1014 g
D : About 10 x 10 -28 g
Q.no 7. In an N-type semiconductor, donor level is
A : above the conduction band of the host
B : close to the conduction band of the host
C : close to the valence band of the host crystal.
D : below to the valence band of the host crystal
Q.no 8. The normalization condition indicates that probabilities of finding the particle
A : in a small volume summed up over the entire space must give 1
B : in a small volume must give 1
C : in a small volume summed up along the positive direction must give 1
D : in a small volume summed up along the negative direction must give 1
Q.no 9. Sound intensity is
A : energy/time
B : wb/m3
C : watt/m2
D : energy/time. area
Q.no 10. Bending of light around the straight edge of obstacle and spreading into its geometrical shadow is called as
A : Diffraction
B : Interference
C : Polarization
D : Dispersion
Q.no 11. The characteristics of laser beam are
A : Highly directional
B : Highly intense
C : Highly monochromatic
D : All of these
Q.no 12. When two semiconductors of p-type & n-type are brought in contact with each other, the P-N junction formed behaves like
A : an oscillator
B : an amplifier
C : a diode
D : a conductor
Q.no 13. The temperature at which conductivity of material becomes infinite is called.
A : Critical temperature
B : absolute temperature
C : Mean temperature
D : Crystallization temperature
Q.no 14. For an infinitely deep 1 dimentional potential well, a quantum particle in the ground state is likely to be found
A : at one corner of the well
B : At 1/4th and 3/4th distance from one end of the well
C : At every point in the well with equal probability
D : At the center of the well
Q.no 15. According to the Malu’s law, the intensity of polarized light emerging through the analyzer varies as
A : I =Iₒ cosθ
B : I =Iₒ/cos2θ
C : I =Iₒ / cos²θ
D : I =Iₒ cos²θ
Q.no 16. Photovoltaic cells convert light energy into
A : solar energy
B : electrical energy
C : mechanical energy
D : kinetic energy
Q.no 17. Principal maxima for fraunhoffer single slit diffraction is obtained at ѳ
A : nλ
B : (n/2)π
C : 1
D : 0
Q.no 18. Formation of colour in a thin film of oil is due to
A : Interference of light waves
B : Diffraction of light waves
C : Scattering of light rays rays
D : Dispersion of light rays
Q.no 19. In Newton’s ring experiment ,with air as a medium between Plano convex lens and glass plate, diameter of nth dark ring is
A : √4nrλ
B : √4nr
C : √(2n-1)2rλ
D : √4nr/λ
Q.no 20. In the Fresnel diffraction the incident wave front is
A : Spherical
B : Cylindrical
C : Spherical or cylindrical
D : Plane
Q.no 21. Laser action is possible only if there is
A : a set of reflecting mirrors
B : a black body
C : population inversion
D : oscillations of laser source
Q.no 22. In forward bias, the width of depletion region in a p-n junction diode
A : increases
B : decreases
C : remains constant
D : first (A) then (B)
Q.no 23. The current in a superconductor produces
A : zero, voltage drop across it
B : a strong, electric field around it
C : a small voltage drop across it
D : a large voltage drop across it
Q.no 24. Fringe width is defined as the distance between two consecutive
A : Crests
B : Bright fringes only
C : Dark fringes only
D : Bright or dark fringes
Q.no 25. The intensity of central bright band in the case of diffraction is
A : maximum
B : minimum
C : varies between max to min
D : none of above
Q.no 26. Current once initiated in a superconducting ring can continue to flow infinitely without any power losses
Is called
Is called
A : Infinite current
B : Critical current
C : Persistent current
D : induced current
Q.no 27. ln superconductivity, the conductivity of a material becomes.
A : zero
B : finite
C : infinite
D : None of the above
Q.no 28. _ _ _ _ _ superconductor is completely diamagnetic
A : Type - l
B : Type - ll
C : both
D : none of the above
Q.no 29. Ψ is called the wave function of the particle. If |Ψ|2 is 0.1, the probability of finding the particle at a given location at a given time is
A : 0.1
B : (0.1)2
C : (0.1)1/2
D : None of these
Q.no 30. The minimum amount of current passed through the body of superconducter in order of destroy the superconductivity is called.
A : induced current
B : Critical current
C : Eddy current
D : super current
Q.no 31. For the Solar cell the ratio of maximum power delivered to ideal power is called as
A : Efficiency
B : Fill factor
C : short-circuit
D : Open-circuit
Q.no 32. What happens to O-ray and E-ray if they travel along the optic axis?
A : E-ray travels faster than O-ray
B : O-ray travels faster than E-ray
C : Both ray travels with same velocity
D : None of the above
Q.no 33. To check the optical flatness of the surface in wedge-shape thin film fringe-width must be
A : Equal, straight
B : Unequal, straight
C : Unequal, curved
D : Equal, curved
Q.no 34. In Newton's rings the central spot is
A : Always bright
B : Always dark
C : Can be bright or dark
D : Of blue colour
Q.no 35. The intensity level expressed in a unit
A : bel
B : 10-12W/m2
C : Newton
D : db/m
Q.no 36. The expression for the thickness of a half-wave plate of positive crystal is
A : t = λ / (μe - μo )
B : t = λ / 2(μe - μo )
C : t = λ / 3(μe - μo )
D : t = λ /2 (μo – μe )
Q.no 37. Which of the following cannot be polarized?
A : Radio waves
B : Sound waves
C : Light waves
D : X-rays
Q.no 38. The Fermi level in intrinsic semiconductor lies exactly at the of the forbidden band
A : above
B : center
C : below
D : none of these
Q.no 39. Nanotechnology is the science of designing,creating and using the materials in which atleast one dimension has a size in the range of
A : 1nm-100nm
B : 0.01nm to 0.1 nm
C : 100 nm- 1000nm
D : 30- 50 nm
Q.no 40. Which of the following will remain unchanged when a sound wave travels in air or in water?
A : Amplitude
B : frequency
C : wavelength
D : Speed
Q.no 41. In the P-type semiconductor, the hole concentration in valence band is----------- than the electron concentration in conduction band.
A : less than
B : greater than
C : equal to
D : all of these
Q.no 42. In a semiconductor, current conduction is due to
A : only holes
B : both holes and free electrons
C : only free electrons
D : none of the above
Q.no 43. Sound waves of frequency less than 20 Hz are called
A : longitudinal wave
B : ultrasonic wave
C : Infrasonic waves
D : mechanical wave
Q.no 44. A hologram is most similar to a
A : Dispersion
B : prism
C : 3-D photograph
D : compound lens
Q.no 45. The main principle of optical fiber is
A : total internal dispersion
B : total internal reflection
C : total internal refraction
D : none of the above
Q.no 46. The superconducting State is perfectly _ _ _ _ _ in nature.
A : Diamagnetic
B : Paramagnetic
C : Ferromagnetic
D : All above
Q.no 47. The speed of sound in medium depends upon
A : Amplitude
B : frequency
C : wavelength
D : properties of the medium
Q.no 48. The battery connection required to forward bias a p-n junction are
A : +ve terminal to p and —ve terminal to n
B : -ve terminal to p and —ve terminal to n
C : -ve terminal to p and +ve terminal to n
D : none of the above
Q.no 49. When the temperature of n- type semiconductor is increased
A : net negative charge increases
B : minority carriers decreases
C : electron-hole pairs increases
D : none of the above
Q.no 50. At the critical temperature and less than critical temperature the resistance of a superconductor.
A : increase rapidly
B : decrease rapidly
C : remains zero
D : increase slowly
Q.no 51. Superconductivity was first observed by
A : Volta
B : Meissner
C : Kamerling Onnes
D : Schrieffer
Q.no 52. Reverberation time T of a hall varies is inversely proportional as the
A : density
B : degree of sensation
C : effective area
D : square of amplitude
Q.no 53. In case of ruby laser, optical resonator cavity is formed by the silvered ends of
A : Ruby crystal
B : The Calcium crystal
C : Tourmaline crystal
D : Quartz crystal
Q.no 54. If the gap between plano- convex lens and plane glass plate filled with the liquid instead of air then
A : Diameter of rings increases
B : Diameter of rings decreases
C : Diameter of rings does not change
D : All above are correct
Q.no 55. De Broglie wave is expresssed in terms of Ψ. What is Ψ?
A : It is the energy of particles producing matter waves
B : It is the momentum of particles producing matter waves
C : It is the uncertainity in position of particles producing matter waves
D : It represents the oscillations of quantity that produces matter waves.
Q.no 56. The effective path or phase difference between the reflected rays for antirefiection films
A : λ/4 or π/2
B : λ or π/2
C : λ/2 or π
D : 2λor π/2
Q.no 57. Velocity of sound wave is given by
A : v = f/λ
B : v = f.λ
C : v =λ/f
D : v = f/T
Q.no 58. Ultrasonic are sound waves having frequency greater than
A : 20 MHz
B : 20 kHz
C : 20GHz
D : 20 Hz
Q.no 59. Matter waves are associated with
A : Positively charged particles
B : Negatively charged particles
C : Neutral particles
D : All of these
Q.no 60. The basic principle of holography is
A : to create the interference pattern of object wave only
B : to create the interference pattern of reference wave only
C : to create the interference pattern of object wave and reference wave
D : none of the above
Answer for Question No 1. is b
Answer for Question No 2. is a
Answer for Question No 3. is a
Answer for Question No 4. is b
Answer for Question No 5. is b
Answer for Question No 6. is d
Answer for Question No 7. is b
Answer for Question No 8. is a
Answer for Question No 9. is d
Answer for Question No 10. is a
Answer for Question No 11. is d
Answer for Question No 12. is c
Answer for Question No 13. is a
Answer for Question No 14. is d
Answer for Question No 15. is d
Answer for Question No 16. is b
Answer for Question No 17. is d
Answer for Question No 18. is a
Answer for Question No 19. is a
Answer for Question No 20. is a
Answer for Question No 21. is c
Answer for Question No 22. is b
Answer for Question No 23. is a
Answer for Question No 24. is d
Answer for Question No 25. is a
Answer for Question No 26. is c
Answer for Question No 27. is c
Answer for Question No 28. is a
Answer for Question No 29. is a
Answer for Question No 30. is b
Answer for Question No 31. is b
Answer for Question No 32. is c
Answer for Question No 33. is a
Answer for Question No 34. is b
Answer for Question No 35. is a
Answer for Question No 36. is b
Answer for Question No 37. is b
Answer for Question No 38. is b
Answer for Question No 39. is a
Answer for Question No 40. is b
Answer for Question No 41. is b
Answer for Question No 42. is c
Answer for Question No 43. is c
Answer for Question No 44. is c
Answer for Question No 45. is b
Answer for Question No 46. is a
Answer for Question No 47. is d
Answer for Question No 48. is a
Answer for Question No 49. is c
Answer for Question No 50. is c
Answer for Question No 51. is a
Answer for Question No 52. is c
Answer for Question No 53. is a
Answer for Question No 54. is b
Answer for Question No 55. is d
Answer for Question No 56. is c
Answer for Question No 57. is b
Answer for Question No 58. is b
Answer for Question No 59. is d
Answer for Question No 60. is c
Seat No -
Total number of questions : 60
1000499 T1 ENGINEERING PHYSICS
Time : 1hr
Max Marks : 50
N.B
1) All questions are Multiple Choice Questions having single correct option.
2) Attempt any 50 questions out of 60.
3) Use of calculator is allowed.
4) Each question carries 1 Mark.
5) Specially abled students are allowed 20 minutes extra for examination.
6) Do not use pencils to darken answer.
7) Use only black/blue ball point pen to darken the appropriate circle.
8) No change will be allowed once the answer is marked on OMR Sheet.
9) Rough work shall not be done on OMR sheet or on question paper.
10) Darken ONLY ONE CIRCLE for each answer.
Q.no 1. When a ray is reflected from denser medium, its phase changes by(in radian)
A : 0
B : π
C : 2π
D : 3π
Q.no 2. What happens to O-ray and E-ray if they travel along the optic axis?
A : E-ray travels faster than O-ray
B : O-ray travels faster than E-ray
C : Both ray travels with same velocity
D : None of the above
Q.no 3. Which of the following cannot be polarized?
A : Radio waves
B : Sound waves
C : Light waves
D : X-rays
Q.no 4. Depth sounding technique is based on principle of
A : Cavitations
B : navigation
C : reflection
D : echo sounding
Q.no 5. In an N-type semiconductor, donor level is
A : above the conduction band of the host
B : close to the conduction band of the host
C : close to the valence band of the host crystal.
D : below to the valence band of the host crystal
Q.no 6. __________ are used in sunscreen lotions to protect the skin from ultraviolet radiations
A : Zinc oxide and Titanium oxide nanoparticles
B : Talcum stone particles
C : Non-metal nanoparticles
D : Quantum dots
Q.no 7. Effective path difference between two successive reflected rays by thin parallel film is
A : 2μtcosr+ λ/2
B : 0
C : 2μtcosr
D : 2μtcosr+n λ
Q.no 8. Nanotechnology is the science of designing,creating and using the materials in which atleast one dimension has a size in the range of
A : 1nm-100nm
B : 0.01nm to 0.1 nm
C : 100 nm- 1000nm
D : 30- 50 nm
Q.no 9. The intensity level expressed in a unit
A : bel
B : 10-12W/m2
C : Newton
D : db/m
Q.no 10. For the Solar cell the ratio of maximum power delivered to ideal power is called as
A : Efficiency
B : Fill factor
C : short-circuit
D : Open-circuit
Q.no 11. The points of constructive interference of light are
A : May be bright or dark
B : Always bright
C : Always dark
D : Neighter bight nor dark
Q.no 12. The impurity level in an extrinsic semiconductor is about of pure semiconductor
A : 10 atoms for 103 atoms
B : 10 atoms for 102 atoms
C : 1 atoms for 108 atoms
D : 1 atoms for 100 atom
Q.no 13. piezoelectric effect has been observed in
A : nickel
B : glass
C : quartz
D : mica
Q.no 14. When the temperature of n- type semiconductor is increased
A : net negative charge increases
B : minority carriers decreases
C : electron-hole pairs increases
D : none of the above
Q.no 15. The Cooper pairs are electron pairs with
A : equal and same momentum
B : Unequal & same spin
C : Equal and opposite momentum and spin
D : Unequal & opposite spin and momentum
Q.no 16. Heisenberg Uncertainty Principle is significant for subatomic particles because
A : Their energy is small
B : They show wave particle duality
C : Their velocity is small
D : They show photoelectric effect
Q.no 17. Which is the correct relation for forbidden energy gap in conductor, semi-conductor and insulator?
A : ΔEg conductor > ΔEg semiconductor> ΔEginsulator
B : ΔEgconductor > ΔEginsulator > Δ Eg semiconductor
C : ΔEginsulator > Δ Eg semiconductor > ΔEgconductor
D : ΔEg semiconductor > Δ Egconductor > ΔEginsulator
Q.no 18. Wave function Ψ represents
A : Potential energy of particles producing matter waves
B : Oscillations of quantity that produces matter waves
C : Momentum of particles that produces matter waves
D : Kinetic energy of particles producing matter waves
Q.no 19. Ultrasonic waves are produced by
A : piezoelectric effect
B : Doppler effect
C : Peltier effect
D : magneto-optic effect
Q.no 20. If the material is reduced to nano size then properties of those materials _____________ from those of the bulk material
A : slightly differ
B : drastically differ
C : remain same
D : can’t say
Q.no 21. Plane polarized light can be produced by
A : Simple reflection
B : Pile of plates
C : Nicol’s prism
D : All of these
Q.no 22. Bending of light around the straight edge of obstacle and spreading into its geometrical shadow is called as
A : Diffraction
B : Interference
C : Polarization
D : Dispersion
Q.no 23. The expression for the thickness of a half-wave plate of positive crystal is
A : t = λ / (μe - μo )
B : t = λ / 2(μe - μo )
C : t = λ / 3(μe - μo )
D : t = λ /2 (μo – μe )
Q.no 24. When the size of the material reduces, the surface area to volume ratio ________
A : decreases
B : Increases
C : remains same
D : becomes exactly equal to the volume
Q.no 25. In a narrow wave packet of matter wave
A : The position of the particle cannot be determined accurately
B : The momentum of the particle cannot be determined accurately
C : Concept of wave group does not exist
D : Phase velocity is always zero
Q.no 26. Reverberation time T of a hall varies is inversely proportional as the
A : density
B : degree of sensation
C : effective area
D : square of amplitude
Q.no 27. In the P-type semiconductor, the hole concentration in valence band is----------- than the electron concentration in conduction band.
A : less than
B : greater than
C : equal to
D : all of these
Q.no 28. When the light is incident at the polarizing angle, which of the following is completely polarized?
A : reflected light
B : refracted light
C : both reflected as well as refracted light
D : neither reflected nor refracted light
Q.no 29. Data storage capacities of hard disks and have led to small and faster microprocessors due to the use of ______________
A : Nanosized electronic components
B : Pure semiconductors
C : Capacitive components
D : Inductive components
Q.no 30. Sound waves of frequency less than 20 Hz are called
A : longitudinal wave
B : ultrasonic wave
C : Infrasonic waves
D : mechanical wave
Q.no 31. _ _ _ _ _ superconductor is completely diamagnetic
A : Type - l
B : Type - ll
C : both
D : none of the above
Q.no 32. For an infinitely deep 1 dimentional potential well, a quantum particle in the ground state is likely to be found
A : at one corner of the well
B : At 1/4th and 3/4th distance from one end of the well
C : At every point in the well with equal probability
D : At the center of the well
Q.no 33. On reverse biasing the P-N junction,its depletion region becomes
A : narrow
B : zero
C : broad
D : constant
Q.no 34. Laevo-rotatory optically active substance rotates the plane of vibrations
A : In clockwise direction
B : In left hand side
C : By 1800
D : None of the above
Q.no 35. Formation of colour in a thin film of oil is due to
A : Interference of light waves
B : Diffraction of light waves
C : Scattering of light rays rays
D : Dispersion of light rays
Q.no 36. The forbidden energy gap in an insulator is of the order of
A : 1 eV
B : 2 eV
C : 0.1 eV
D : 5 eV
Q.no 37. Sound travel in the form of
A : longitudinal
B : transverse
C : mechanical
D : Infrasonic waves
Q.no 38. Laser action is possible only if there is
A : a set of reflecting mirrors
B : a black body
C : population inversion
D : oscillations of laser source
Q.no 39. De Broglie wave is expresssed in terms of Ψ. What is Ψ?
A : It is the energy of particles producing matter waves
B : It is the momentum of particles producing matter waves
C : It is the uncertainity in position of particles producing matter waves
D : It represents the oscillations of quantity that produces matter waves.
Q.no 40. Photovoltaic cells convert light energy into
A : solar energy
B : electrical energy
C : mechanical energy
D : kinetic energy
Q.no 41. The main principle of optical fiber is
A : total internal dispersion
B : total internal reflection
C : total internal refraction
D : none of the above
Q.no 42. Superconductivity was first observed by
A : Volta
B : Meissner
C : Kamerling Onnes
D : Schrieffer
Q.no 43. In forward bias, the width of depletion region in a p-n junction diode
A : increases
B : decreases
C : remains constant
D : first (A) then (B)
Q.no 44. The phenomena of the echo is used to measure the
A : length of metal
B : flaws in metal
C : transfer signals
D : none
Q.no 45. For the wavefunction to be true or acceptable, the following conditions are to be followed by it
A : Continuous
B : Finite
C : Normalizable
D : All of these
Q.no 46. Quantum mechanically, minimum energy of a particle enclosed in a potential well cannot be
A : 1 eV
B : zero
C : 100 eV
D : 1 KeV
Q.no 47. According to de Broglie hypothesis
A : A particle in rest has matter waves associated with it
B : A particle at rest or in motion has matter wave associated with it
C : A particle in motion has matter wave associated with it
D : All above statements are correct
Q.no 48. Ψ is called the wave function of the particle. If |Ψ|2 is 0.1, the probability of finding the particle at a given location at a given time is
A : 0.1
B : (0.1)2
C : (0.1)1/2
D : None of these
Q.no 49. Plane polarized light has vibrations
A : In one direction perpendicular to direction of propagation
B : Along the direction of propagation
C : In two directions perpendicular to direction of propagation
D : In all directions perpendicular to direction of propagation
Q.no 50. In Newton’s ring experiment if the air film is replaced by water film, then the diameter of the ring
A : Decreases
B : Increases
C : Remains same
D : None of the above
Q.no 51. In Newton’s ring experiment ,with air as a medium between Plano convex lens and glass plate, diameter of nth dark ring is
A : √4nrλ
B : √4nr
C : √(2n-1)2rλ
D : √4nr/λ
Q.no 52. For constructive interference the path difference should be
A : Zero or odd multiple of wavelength
B : Only integral multiple of wavelength
C : 0
D : Zero or integral multiple of wavelength
Q.no 53. What would be true for wavelengths of De Broglie waves
A : λ (electron) = λ (proton)
B : λ (electron) > λ (proton)
C : λ (electron) < λ (proton)
D : λ (electron) ~ λ (proton)
Q.no 54. Fringe width is defined as the distance between two consecutive
A : Crests
B : Bright fringes only
C : Dark fringes only
D : Bright or dark fringes
Q.no 55. The intensity of central bright band in the case of diffraction is
A : maximum
B : minimum
C : varies between max to min
D : none of above
Q.no 56. The effective path or phase difference between the reflected rays for antirefiection films
A : λ/4 or π/2
B : λ or π/2
C : λ/2 or π
D : 2λor π/2
Q.no 57. Matter waves are associated with
A : Positively charged particles
B : Negatively charged particles
C : Neutral particles
D : All of these
Q.no 58. Heisenberg Uncertainty Principle is not significant for daily life objects because
A : The value of Planck's constant is insignificant for these particles
B : It is difficult to observe wave particle duality in daily life objects
C : Daily life objects are macroscopic
D : All of these
Q.no 59. Velocity of sound wave is given by
A : v = f/λ
B : v = f.λ
C : v =λ/f
D : v = f/T
Q.no 60. The concept of wave function is insufficient to tell about probability of particle because
A : Wave function is negative at places of negative amplitude. Thus probability would come out to be negative which is meaningless.
B : Wave function is not single valued
C : Wave function is continuous. Ψ could have been considered as the sufficient function if it had been discontinuous.
D : Wave function directlty gives the uncertainty in position and not the probability.
Answer for Question No 1. is b
Answer for Question No 2. is c
Answer for Question No 3. is b
Answer for Question No 4. is d
Answer for Question No 5. is b
Answer for Question No 6. is a
Answer for Question No 7. is a
Answer for Question No 8. is a
Answer for Question No 9. is a
Answer for Question No 10. is b
Answer for Question No 11. is b
Answer for Question No 12. is c
Answer for Question No 13. is c
Answer for Question No 14. is c
Answer for Question No 15. is c
Answer for Question No 16. is b
Answer for Question No 17. is c
Answer for Question No 18. is b
Answer for Question No 19. is a
Answer for Question No 20. is b
Answer for Question No 21. is d
Answer for Question No 22. is a
Answer for Question No 23. is b
Answer for Question No 24. is b
Answer for Question No 25. is b
Answer for Question No 26. is c
Answer for Question No 27. is b
Answer for Question No 28. is a
Answer for Question No 29. is a
Answer for Question No 30. is c
Answer for Question No 31. is a
Answer for Question No 32. is d
Answer for Question No 33. is c
Answer for Question No 34. is b
Answer for Question No 35. is a
Answer for Question No 36. is d
Answer for Question No 37. is a
Answer for Question No 38. is c
Answer for Question No 39. is d
Answer for Question No 40. is b
Answer for Question No 41. is b
Answer for Question No 42. is a
Answer for Question No 43. is b
Answer for Question No 44. is b
Answer for Question No 45. is d
Answer for Question No 46. is b
Answer for Question No 47. is c
Answer for Question No 48. is a
Answer for Question No 49. is a
Answer for Question No 50. is a
Answer for Question No 51. is a
Answer for Question No 52. is d
Answer for Question No 53. is b
Answer for Question No 54. is d
Answer for Question No 55. is a
Answer for Question No 56. is c
Answer for Question No 57. is d
Answer for Question No 58. is d
Answer for Question No 59. is b
Answer for Question No 60. is a
Seat No -
Total number of questions : 60
1000499 T1 ENGINEERING PHYSICS
Time : 1hr
Max Marks : 50
N.B
1) All questions are Multiple Choice Questions having single correct option.
2) Attempt any 50 questions out of 60.
3) Use of calculator is allowed.
4) Each question carries 1 Mark.
5) Specially abled students are allowed 20 minutes extra for examination.
6) Do not use pencils to darken answer.
7) Use only black/blue ball point pen to darken the appropriate circle.
8) No change will be allowed once the answer is marked on OMR Sheet.
9) Rough work shall not be done on OMR sheet or on question paper.
10) Darken ONLY ONE CIRCLE for each answer.
Q.no 1. _________ superconductors are also called soft superconductors
A : Type I
B : Type II
C : Type III
D : Type IV
Q.no 2. For the wavefunction to be true or acceptable, the following conditions are to be followed by it
A : Continuous
B : Finite
C : Normalizable
D : All of these
Q.no 3. The battery connection required to forward bias a p-n junction are
A : +ve terminal to p and —ve terminal to n
B : -ve terminal to p and —ve terminal to n
C : -ve terminal to p and +ve terminal to n
D : none of the above
Q.no 4. What would be true for wavelengths of De Broglie waves
A : λ (electron) = λ (proton)
B : λ (electron) > λ (proton)
C : λ (electron) < λ (proton)
D : λ (electron) ~ λ (proton)
Q.no 5. Plane polarized light has vibrations
A : In one direction perpendicular to direction of propagation
B : Along the direction of propagation
C : In two directions perpendicular to direction of propagation
D : In all directions perpendicular to direction of propagation
Q.no 6. Laevo-rotatory optically active substance rotates the plane of vibrations
A : In clockwise direction
B : In left hand side
C : By 1800
D : None of the above
Q.no 7. Nanotechnology is the science of designing,creating and using the materials in which atleast one dimension has a size in the range of
A : 1nm-100nm
B : 0.01nm to 0.1 nm
C : 100 nm- 1000nm
D : 30- 50 nm
Q.no 8. Fringe width is defined as the distance between two consecutive
A : Crests
B : Bright fringes only
C : Dark fringes only
D : Bright or dark fringes
Q.no 9. At the critical temperature and less than critical temperature the resistance of a superconductor.
A : increase rapidly
B : decrease rapidly
C : remains zero
D : increase slowly
Q.no 10. Which of the following when added as an impurity into the silicon produces N-type semiconductor?
A : P
B : B
C : Al
D : Mg
Q.no 11. According to de Broglie hypothesis equation λ=h/p is applicable for
A : Matter particle only
B : Photons only
C : Both matter particle and photon
D : All options are correct
Q.no 12. n type & p type silicon can be obtained by doping pure silicon with
A : Arsenic & Phosphorus
B : Indium & Aluminum
C : Phosphorus & Indium
D : Aluminum & Boron
Q.no 13. The phenomenon in which the magnetic line of force are expelled out of the superconducting material at Critical temperature is called.
A : isotopic effect
B : Meissner effect
C : BCS * theory
D : London theory
Q.no 14. The light source used for optical pumping in Ruby laser is
A : Xenon
B : Argon
C : Neon
D : none of the above
Q.no 15. The minimum amount of current passed through the body of superconducter in order of destroy the superconductivity is called.
A : induced current
B : Critical current
C : Eddy current
D : super current
Q.no 16. Heisenberg Uncertainty Principle is significant for subatomic particles because
A : Their energy is small
B : They show wave particle duality
C : Their velocity is small
D : They show photoelectric effect
Q.no 17. In case of ruby laser, optical resonator cavity is formed by the silvered ends of
A : Ruby crystal
B : The Calcium crystal
C : Tourmaline crystal
D : Quartz crystal
Q.no 18. ln Magnetostriction Oscillator
A : a copper rod is used
B : a nickel rod is used
C : a magnesium rod is used
D : an aluminium rod is used
Q.no 19. Bending of light around the straight edge of obstacle and spreading into its geometrical shadow is called as
A : Diffraction
B : Interference
C : Polarization
D : Dispersion
Q.no 20. The normalization condition indicates that probabilities of finding the particle
A : in a small volume summed up over the entire space must give 1
B : in a small volume must give 1
C : in a small volume summed up along the positive direction must give 1
D : in a small volume summed up along the negative direction must give 1
Q.no 21. __________ are used in sunscreen lotions to protect the skin from ultraviolet radiations
A : Zinc oxide and Titanium oxide nanoparticles
B : Talcum stone particles
C : Non-metal nanoparticles
D : Quantum dots
Q.no 22. To check the optical flatness of the surface in wedge-shape thin film fringe-width must be
A : Equal, straight
B : Unequal, straight
C : Unequal, curved
D : Equal, curved
Q.no 23. Pumping process used in diode laser is
A : optical pumping
B : forward biased voltage
C : electrical discharge
D : none of these
Q.no 24. At 0 K, intrinsic semiconductor behaves as
A : a perfect conductor
B : a super conductor
C : a semiconductor
D : a perfect insulator
Q.no 25. Intensity of diffraction at an angle ѳ for fraunhoffer diffraction by grating is given by Iѳ
A : (sinNβ/ sinβ)
B : (sinβ)2
C : (sinα/α)2
D : Im(sinα/α)2 (sinNβ/ sinβ)2
Q.no 26. If the material is reduced to nano size then properties of those materials _____________ from those of the bulk material
A : slightly differ
B : drastically differ
C : remain same
D : can’t say
Q.no 27. Effective path difference between two successive reflected rays by thin parallel film is
A : 2μtcosr+ λ/2
B : 0
C : 2μtcosr
D : 2μtcosr+n λ
Q.no 28. For the Solar cell the ratio of maximum power delivered to ideal power is called as
A : Efficiency
B : Fill factor
C : short-circuit
D : Open-circuit
Q.no 29. In Newton's rings the central spot is
A : Always bright
B : Always dark
C : Can be bright or dark
D : Of blue colour
Q.no 30. When the size of the material is reduced to size in nano region, the energy band structure undergo______________which mainly accounts for the change in the properties of nanoparticles
A : Small variations
B : large variations
C : Splitting
D : scattering
Q.no 31. The points of constructive interference of light are
A : May be bright or dark
B : Always bright
C : Always dark
D : Neighter bight nor dark
Q.no 32. In Newton’s ring experiment ,with air as a medium between Plano convex lens and glass plate, diameter of nth dark ring is
A : √4nrλ
B : √4nr
C : √(2n-1)2rλ
D : √4nr/λ
Q.no 33. Wave function Ψ represents
A : Potential energy of particles producing matter waves
B : Oscillations of quantity that produces matter waves
C : Momentum of particles that produces matter waves
D : Kinetic energy of particles producing matter waves
Q.no 34. The Cooper pairs are electron pairs with
A : equal and same momentum
B : Unequal & same spin
C : Equal and opposite momentum and spin
D : Unequal & opposite spin and momentum
Q.no 35. We prefer Polaroid sunglasses because they
A : have soothing colours
B : reduce the intensity of light
C : are cheaper
D : can change colour
Q.no 36. When two semiconductors of p-type & n-type are brought in contact with each other, the P-N junction formed behaves like
A : an oscillator
B : an amplifier
C : a diode
D : a conductor
Q.no 37. In forward bias, the width of depletion region in a p-n junction diode
A : increases
B : decreases
C : remains constant
D : first (A) then (B)
Q.no 38. Ultrasonic waves are produced by
A : piezoelectric effect
B : Doppler effect
C : Peltier effect
D : magneto-optic effect
Q.no 39. Types - l superconductors are ___________ temperature superconductor.
A : low
B : absolute
C : High
D : None of the Above
Q.no 40. In the Fresnel diffraction the incident wave front is
A : Spherical
B : Cylindrical
C : Spherical or cylindrical
D : Plane
Q.no 41. The main principle of optical fiber is
A : total internal dispersion
B : total internal reflection
C : total internal refraction
D : none of the above
Q.no 42. Formation of colour in a thin film of oil is due to
A : Interference of light waves
B : Diffraction of light waves
C : Scattering of light rays rays
D : Dispersion of light rays
Q.no 43. In a narrow wave packet of matter wave
A : The position of the particle cannot be determined accurately
B : The momentum of the particle cannot be determined accurately
C : Concept of wave group does not exist
D : Phase velocity is always zero
Q.no 44. Laser action is possible only if there is
A : a set of reflecting mirrors
B : a black body
C : population inversion
D : oscillations of laser source
Q.no 45. Sound intensity is
A : energy/time
B : wb/m3
C : watt/m2
D : energy/time. area
Q.no 46. Quantum mechanically, minimum energy of a particle enclosed in a potential well cannot be
A : 1 eV
B : zero
C : 100 eV
D : 1 KeV
Q.no 47. In Newton’s ring experiment if the air film is replaced by water film, then the diameter of the ring
A : Decreases
B : Increases
C : Remains same
D : None of the above
Q.no 48. The impurity level in an extrinsic semiconductor is about of pure semiconductor
A : 10 atoms for 103 atoms
B : 10 atoms for 102 atoms
C : 1 atoms for 108 atoms
D : 1 atoms for 100 atom
Q.no 49. What happens to O-ray and E-ray if they travel along the optic axis?
A : E-ray travels faster than O-ray
B : O-ray travels faster than E-ray
C : Both ray travels with same velocity
D : None of the above
Q.no 50. Which of the following cannot be polarized?
A : Radio waves
B : Sound waves
C : Light waves
D : X-rays
Q.no 51. The temperature at which conductivity of material becomes infinite is called.
A : Critical temperature
B : absolute temperature
C : Mean temperature
D : Crystallization temperature
Q.no 52. According to the Malu’s law, the intensity of polarized light emerging through the analyzer varies as
A : I =Iₒ cosθ
B : I =Iₒ/cos2θ
C : I =Iₒ / cos²θ
D : I =Iₒ cos²θ
Q.no 53. The Fermi level in intrinsic semiconductor lies exactly at the of the forbidden band
A : above
B : center
C : below
D : none of these
Q.no 54. A hologram is most similar to a
A : Dispersion
B : prism
C : 3-D photograph
D : compound lens
Q.no 55. Plane polarized light can be produced by
A : Simple reflection
B : Pile of plates
C : Nicol’s prism
D : All of these
Q.no 56. Ultrasonic are sound waves having frequency greater than
A : 20 MHz
B : 20 kHz
C : 20GHz
D : 20 Hz
Q.no 57. The basic principle of holography is
A : to create the interference pattern of object wave only
B : to create the interference pattern of reference wave only
C : to create the interference pattern of object wave and reference wave
D : none of the above
Q.no 58. Intensity at any point on the screen at angle Ѳ for Fraunhoffer single slit is given by I
A : (n/2)π
B : Im(sinα/α)2
C : sin-1(nλ/a)
D : (sinα/α)2
Q.no 59. Heisenberg Uncertainty Principle is not significant for daily life objects because
A : The value of Planck's constant is insignificant for these particles
B : It is difficult to observe wave particle duality in daily life objects
C : Daily life objects are macroscopic
D : All of these
Q.no 60. The reverberation time is the time required for the intensity to drop by
A : 30dB
B : 90dB
C : C 60dB
D : 120dB
Answer for Question No 1. is a
Answer for Question No 2. is d
Answer for Question No 3. is a
Answer for Question No 4. is b
Answer for Question No 5. is a
Answer for Question No 6. is b
Answer for Question No 7. is a
Answer for Question No 8. is d
Answer for Question No 9. is c
Answer for Question No 10. is a
Answer for Question No 11. is c
Answer for Question No 12. is c
Answer for Question No 13. is b
Answer for Question No 14. is a
Answer for Question No 15. is b
Answer for Question No 16. is b
Answer for Question No 17. is a
Answer for Question No 18. is b
Answer for Question No 19. is a
Answer for Question No 20. is a
Answer for Question No 21. is a
Answer for Question No 22. is a
Answer for Question No 23. is b
Answer for Question No 24. is d
Answer for Question No 25. is d
Answer for Question No 26. is b
Answer for Question No 27. is a
Answer for Question No 28. is b
Answer for Question No 29. is b
Answer for Question No 30. is b
Answer for Question No 31. is b
Answer for Question No 32. is a
Answer for Question No 33. is b
Answer for Question No 34. is c
Answer for Question No 35. is b
Answer for Question No 36. is c
Answer for Question No 37. is b
Answer for Question No 38. is a
Answer for Question No 39. is a
Answer for Question No 40. is a
Answer for Question No 41. is b
Answer for Question No 42. is a
Answer for Question No 43. is b
Answer for Question No 44. is c
Answer for Question No 45. is d
Answer for Question No 46. is b
Answer for Question No 47. is a
Answer for Question No 48. is c
Answer for Question No 49. is c
Answer for Question No 50. is b
Answer for Question No 51. is a
Answer for Question No 52. is d
Answer for Question No 53. is b
Answer for Question No 54. is c
Answer for Question No 55. is d
Answer for Question No 56. is b
Answer for Question No 57. is c
Answer for Question No 58. is b
Answer for Question No 59. is d
Answer for Question No 60. is c
Seat No -
Total number of questions : 60
1000499 T1 ENGINEERING PHYSICS
Time : 1hr
Max Marks : 50
N.B
1) All questions are Multiple Choice Questions having single correct option.
2) Attempt any 50 questions out of 60.
3) Use of calculator is allowed.
4) Each question carries 1 Mark.
5) Specially abled students are allowed 20 minutes extra for examination.
6) Do not use pencils to darken answer.
7) Use only black/blue ball point pen to darken the appropriate circle.
8) No change will be allowed once the answer is marked on OMR Sheet.
9) Rough work shall not be done on OMR sheet or on question paper.
10) Darken ONLY ONE CIRCLE for each answer.
Q.no 1. In forward bias, the width of depletion region in a p-n junction diode
A : increases
B : decreases
C : remains constant
D : first (A) then (B)
Q.no 2. Superconductivity was first observed by
A : Volta
B : Meissner
C : Kamerling Onnes
D : Schrieffer
Q.no 3. According to de Broglie hypothesis
A : A particle in rest has matter waves associated with it
B : A particle at rest or in motion has matter wave associated with it
C : A particle in motion has matter wave associated with it
D : All above statements are correct
Q.no 4. What happens to O-ray and E-ray if they travel along the optic axis?
A : E-ray travels faster than O-ray
B : O-ray travels faster than E-ray
C : Both ray travels with same velocity
D : None of the above
Q.no 5. The light source used for optical pumping in Ruby laser is
A : Xenon
B : Argon
C : Neon
D : none of the above
Q.no 6. According to the Malu’s law, the intensity of polarized light emerging through the analyzer varies as
A : I =Iₒ cosθ
B : I =Iₒ/cos2θ
C : I =Iₒ / cos²θ
D : I =Iₒ cos²θ
Q.no 7. piezoelectric effect has been observed in
A : nickel
B : glass
C : quartz
D : mica
Q.no 8. The superconducting State is perfectly _ _ _ _ _ in nature.
A : Diamagnetic
B : Paramagnetic
C : Ferromagnetic
D : All above
Q.no 9. The characteristics of laser beam are
A : Highly directional
B : Highly intense
C : Highly monochromatic
D : All of these
Q.no 10. What would be true for wavelengths of De Broglie waves
A : λ (electron) = λ (proton)
B : λ (electron) > λ (proton)
C : λ (electron) < λ (proton)
D : λ (electron) ~ λ (proton)
Q.no 11. The active medium of a helium-neon laser is made up with ________ ratio of helium-neon.
A : 10:1
B : 10:3
C : 10:5
D : 10:6
Q.no 12. De Broglie wave is expresssed in terms of Ψ. What is Ψ?
A : It is the energy of particles producing matter waves
B : It is the momentum of particles producing matter waves
C : It is the uncertainity in position of particles producing matter waves
D : It represents the oscillations of quantity that produces matter waves.
Q.no 13. In an N-type semiconductor, donor level is
A : above the conduction band of the host
B : close to the conduction band of the host
C : close to the valence band of the host crystal.
D : below to the valence band of the host crystal
Q.no 14. When the light is incident at the polarizing angle, which of the following is completely polarized?
A : reflected light
B : refracted light
C : both reflected as well as refracted light
D : neither reflected nor refracted light
Q.no 15. Quantum mechanically, minimum energy of a particle enclosed in a potential well cannot be
A : 1 eV
B : zero
C : 100 eV
D : 1 KeV
Q.no 16. The points of constructive interference of light are
A : May be bright or dark
B : Always bright
C : Always dark
D : Neighter bight nor dark
Q.no 17. The current in a superconductor produces
A : zero, voltage drop across it
B : a strong, electric field around it
C : a small voltage drop across it
D : a large voltage drop across it
Q.no 18. If the gap between plano- convex lens and plane glass plate filled with the liquid instead of air then
A : Diameter of rings increases
B : Diameter of rings decreases
C : Diameter of rings does not change
D : All above are correct
Q.no 19. We prefer Polaroid sunglasses because they
A : have soothing colours
B : reduce the intensity of light
C : are cheaper
D : can change colour
Q.no 20. Intensity of diffraction at an angle ѳ for fraunhoffer diffraction by grating is given by Iѳ
A : (sinNβ/ sinβ)
B : (sinβ)2
C : (sinα/α)2
D : Im(sinα/α)2 (sinNβ/ sinβ)2
Q.no 21. When the temperature of n- type semiconductor is increased
A : net negative charge increases
B : minority carriers decreases
C : electron-hole pairs increases
D : none of the above
Q.no 22. When the size of the material is reduced to size in nano region, the energy band structure undergo______________which mainly accounts for the change in the properties of nanoparticles
A : Small variations
B : large variations
C : Splitting
D : scattering
Q.no 23. For the wavefunction to be true or acceptable, the following conditions are to be followed by it
A : Continuous
B : Finite
C : Normalizable
D : All of these
Q.no 24. Loudness of sound is found to be proportional to the
A : log 10 L
B : log 10 I
C : area
D : log 10 s
Q.no 25. The battery connection required to forward bias a p-n junction are
A : +ve terminal to p and —ve terminal to n
B : -ve terminal to p and —ve terminal to n
C : -ve terminal to p and +ve terminal to n
D : none of the above
Q.no 26. Sound intensity is
A : energy/time
B : wb/m3
C : watt/m2
D : energy/time. area
Q.no 27. _________ superconductors are also called soft superconductors
A : Type I
B : Type II
C : Type III
D : Type IV
Q.no 28. When a ray is reflected from denser medium, its phase changes by(in radian)
A : 0
B : π
C : 2π
D : 3π
Q.no 29. A path difference of 3λ/2 between the two waves corresponds to the phase difference
A : 3π/2
B : π/3
C : 3π
D : 2π/3
Q.no 30. Formation of colour in a thin film of oil is due to
A : Interference of light waves
B : Diffraction of light waves
C : Scattering of light rays rays
D : Dispersion of light rays
Q.no 31. Current once initiated in a superconducting ring can continue to flow infinitely without any power losses
Is called
Is called
A : Infinite current
B : Critical current
C : Persistent current
D : induced current
Q.no 32. __________ are used in sunscreen lotions to protect the skin from ultraviolet radiations
A : Zinc oxide and Titanium oxide nanoparticles
B : Talcum stone particles
C : Non-metal nanoparticles
D : Quantum dots
Q.no 33. When the size of the material reduces, the surface area to volume ratio ________
A : decreases
B : Increases
C : remains same
D : becomes exactly equal to the volume
Q.no 34. Depth sounding technique is based on principle of
A : Cavitations
B : navigation
C : reflection
D : echo sounding
Q.no 35. Reverberation time T of a hall varies is inversely proportional as the
A : density
B : degree of sensation
C : effective area
D : square of amplitude
Q.no 36. Ψ is called the wave function of the particle. If |Ψ|2 is 0.1, the probability of finding the particle at a given location at a given time is
A : 0.1
B : (0.1)2
C : (0.1)1/2
D : None of these
Q.no 37. Optimum reverberation time for music is
A : 0.5 sec
B : 0.1lsec
C : l.2sec
D : Above 5 sec
Q.no 38. Which of the following will remain unchanged when a sound wave travels in air or in water?
A : Amplitude
B : frequency
C : wavelength
D : Speed
Q.no 39. The phenomena of the echo is used to measure the
A : length of metal
B : flaws in metal
C : transfer signals
D : none
Q.no 40. In Newton’s ring experiment if the air film is replaced by water film, then the diameter of the ring
A : Decreases
B : Increases
C : Remains same
D : None of the above
Q.no 41. Reverse bias applied on a junction diode-----------
A : raises the potential barrier
B : decrease the minority carrier current
C : increases the majority carrier current
D : lowers the potential barrier
Q.no 42. For an infinitely deep 1 dimentional potential well, a quantum particle in the ground state is likely to be found
A : at one corner of the well
B : At 1/4th and 3/4th distance from one end of the well
C : At every point in the well with equal probability
D : At the center of the well
Q.no 43. The forbidden energy gap in an insulator is of the order of
A : 1 eV
B : 2 eV
C : 0.1 eV
D : 5 eV
Q.no 44. ln Magnetostriction Oscillator
A : a copper rod is used
B : a nickel rod is used
C : a magnesium rod is used
D : an aluminium rod is used
Q.no 45. The minimum amount of current passed through the body of superconducter in order of destroy the superconductivity is called.
A : induced current
B : Critical current
C : Eddy current
D : super current
Q.no 46. In a semiconductor, current conduction is due to
A : only holes
B : both holes and free electrons
C : only free electrons
D : none of the above
Q.no 47. When two semiconductors of p-type & n-type are brought in contact with each other, the P-N junction formed behaves like
A : an oscillator
B : an amplifier
C : a diode
D : a conductor
Q.no 48. If the material is reduced to nano size then properties of those materials _____________ from those of the bulk material
A : slightly differ
B : drastically differ
C : remain same
D : can’t say
Q.no 49. The walls of the hall built for music concerns should
A : Amplify sound
B : Reflect sound
C : Transmit sound
D : D Absorb sound
Q.no 50. Types - l superconductors are ___________ temperature superconductor.
A : low
B : absolute
C : High
D : None of the Above
Q.no 51. Sound travel in the form of
A : longitudinal
B : transverse
C : mechanical
D : Infrasonic waves
Q.no 52. In case of ruby laser, optical resonator cavity is formed by the silvered ends of
A : Ruby crystal
B : The Calcium crystal
C : Tourmaline crystal
D : Quartz crystal
Q.no 53. To check the optical flatness of the surface in wedge-shape thin film fringe-width must be
A : Equal, straight
B : Unequal, straight
C : Unequal, curved
D : Equal, curved
Q.no 54. Pumping process used in diode laser is
A : optical pumping
B : forward biased voltage
C : electrical discharge
D : none of these
Q.no 55. ln superconductivity, the conductivity of a material becomes.
A : zero
B : finite
C : infinite
D : None of the above
Q.no 56. Ultrasonic are sound waves having frequency greater than
A : 20 MHz
B : 20 kHz
C : 20GHz
D : 20 Hz
Q.no 57. The name given to the unit of sound absorption is-
A : decibel
B : degree
C : sabine
D : watt
Q.no 58. The reverberation time is the time required for the intensity to drop by
A : 30dB
B : 90dB
C : C 60dB
D : 120dB
Q.no 59. Matter waves are associated with
A : Positively charged particles
B : Negatively charged particles
C : Neutral particles
D : All of these
Q.no 60. Heisenberg Uncertainty Principle is not significant for daily life objects because
A : The value of Planck's constant is insignificant for these particles
B : It is difficult to observe wave particle duality in daily life objects
C : Daily life objects are macroscopic
D : All of these
Answer for Question No 1. is b
Answer for Question No 2. is a
Answer for Question No 3. is c
Answer for Question No 4. is c
Answer for Question No 5. is a
Answer for Question No 6. is d
Answer for Question No 7. is c
Answer for Question No 8. is a
Answer for Question No 9. is d
Answer for Question No 10. is b
Answer for Question No 11. is a
Answer for Question No 12. is d
Answer for Question No 13. is b
Answer for Question No 14. is a
Answer for Question No 15. is b
Answer for Question No 16. is b
Answer for Question No 17. is a
Answer for Question No 18. is b
Answer for Question No 19. is b
Answer for Question No 20. is d
Answer for Question No 21. is c
Answer for Question No 22. is b
Answer for Question No 23. is d
Answer for Question No 24. is b
Answer for Question No 25. is a
Answer for Question No 26. is d
Answer for Question No 27. is a
Answer for Question No 28. is b
Answer for Question No 29. is c
Answer for Question No 30. is a
Answer for Question No 31. is c
Answer for Question No 32. is a
Answer for Question No 33. is b
Answer for Question No 34. is d
Answer for Question No 35. is c
Answer for Question No 36. is a
Answer for Question No 37. is c
Answer for Question No 38. is b
Answer for Question No 39. is b
Answer for Question No 40. is a
Answer for Question No 41. is a
Answer for Question No 42. is d
Answer for Question No 43. is d
Answer for Question No 44. is b
Answer for Question No 45. is b
Answer for Question No 46. is c
Answer for Question No 47. is c
Answer for Question No 48. is b
Answer for Question No 49. is d
Answer for Question No 50. is a
Answer for Question No 51. is a
Answer for Question No 52. is a
Answer for Question No 53. is a
Answer for Question No 54. is b
Answer for Question No 55. is c
Answer for Question No 56. is b
Answer for Question No 57. is c
Answer for Question No 58. is c
Answer for Question No 59. is d
Answer for Question No 60. is d
Seat No -
Total number of questions : 60
1000499 T1 ENGINEERING PHYSICS
Time : 1hr
Max Marks : 50
N.B
1) All questions are Multiple Choice Questions having single correct option.
2) Attempt any 50 questions out of 60.
3) Use of calculator is allowed.
4) Each question carries 1 Mark.
5) Specially abled students are allowed 20 minutes extra for examination.
6) Do not use pencils to darken answer.
7) Use only black/blue ball point pen to darken the appropriate circle.
8) No change will be allowed once the answer is marked on OMR Sheet.
9) Rough work shall not be done on OMR sheet or on question paper.
10) Darken ONLY ONE CIRCLE for each answer.
Q.no 1. Reverberation time T of a hall varies is inversely proportional as the
A : density
B : degree of sensation
C : effective area
D : square of amplitude
Q.no 2. The expression for the thickness of a half-wave plate of positive crystal is
A : t = λ / (μe - μo )
B : t = λ / 2(μe - μo )
C : t = λ / 3(μe - μo )
D : t = λ /2 (μo – μe )
Q.no 3. What happens to O-ray and E-ray if they travel along the optic axis?
A : E-ray travels faster than O-ray
B : O-ray travels faster than E-ray
C : Both ray travels with same velocity
D : None of the above
Q.no 4. LASER is a short form of
A : Light attenuation by stimulated emission of radiation
B : Light amplification by stimulated emission of radiation
C : Light absorption by stimulated emission of radiation
D : Light absorption by spontaneous emission of radiation
Q.no 5. The forbidden energy gap in an insulator is of the order of
A : 1 eV
B : 2 eV
C : 0.1 eV
D : 5 eV
Q.no 6. Sound waves of frequency less than 20 Hz are called
A : longitudinal wave
B : ultrasonic wave
C : Infrasonic waves
D : mechanical wave
Q.no 7. A path difference of 3λ/2 between the two waves corresponds to the phase difference
A : 3π/2
B : π/3
C : 3π
D : 2π/3
Q.no 8. At 0 K, intrinsic semiconductor behaves as
A : a perfect conductor
B : a super conductor
C : a semiconductor
D : a perfect insulator
Q.no 9. Which of the following will remain unchanged when a sound wave travels in air or in water?
A : Amplitude
B : frequency
C : wavelength
D : Speed
Q.no 10. Ultrasonic waves are produced by
A : piezoelectric effect
B : Doppler effect
C : Peltier effect
D : magneto-optic effect
Q.no 11. Which of the following when added as an impurity into the silicon produces N-type semiconductor?
A : P
B : B
C : Al
D : Mg
Q.no 12. Current once initiated in a superconducting ring can continue to flow infinitely without any power losses
Is called
Is called
A : Infinite current
B : Critical current
C : Persistent current
D : induced current
Q.no 13. What would be true for wavelengths of De Broglie waves
A : λ (electron) = λ (proton)
B : λ (electron) > λ (proton)
C : λ (electron) < λ (proton)
D : λ (electron) ~ λ (proton)
Q.no 14. piezoelectric effect has been observed in
A : nickel
B : glass
C : quartz
D : mica
Q.no 15. Loudness of sound is found to be proportional to the
A : log 10 L
B : log 10 I
C : area
D : log 10 s
Q.no 16. Depth sounding technique is based on principle of
A : Cavitations
B : navigation
C : reflection
D : echo sounding
Q.no 17. Ψ is called the wave function of the particle. If |Ψ|2 is 0.1, the probability of finding the particle at a given location at a given time is
A : 0.1
B : (0.1)2
C : (0.1)1/2
D : None of these
Q.no 18. In an N-type semiconductor, donor level is
A : above the conduction band of the host
B : close to the conduction band of the host
C : close to the valence band of the host crystal.
D : below to the valence band of the host crystal
Q.no 19. De Broglie wave is expresssed in terms of Ψ. What is Ψ?
A : It is the energy of particles producing matter waves
B : It is the momentum of particles producing matter waves
C : It is the uncertainity in position of particles producing matter waves
D : It represents the oscillations of quantity that produces matter waves.
Q.no 20. A hologram is most similar to a
A : Dispersion
B : prism
C : 3-D photograph
D : compound lens
Q.no 21. Types - l superconductors are ___________ temperature superconductor.
A : low
B : absolute
C : High
D : None of the Above
Q.no 22. According to the Malu’s law, the intensity of polarized light emerging through the analyzer varies as
A : I =Iₒ cosθ
B : I =Iₒ/cos2θ
C : I =Iₒ / cos²θ
D : I =Iₒ cos²θ
Q.no 23. Pumping process used in diode laser is
A : optical pumping
B : forward biased voltage
C : electrical discharge
D : none of these
Q.no 24. The quarter wave plate produces
A : Path difference of λ/4 or phase difference of π /2 radians between O- and E-waves
B : Path difference of λ /2 or phase difference of π /2 radians
C : Path difference of λ /4 or phase difference of π radians
D : None of the above
Q.no 25. If ne & nh are the number of electrons & holes in a semiconductor heavily doped with phosphorus, then
A : ne»nh
B : ne <nh
C : ne«nh
D : ne =nh
Q.no 26. In Newton’s ring experiment ,with air as a medium between Plano convex lens and glass plate, diameter of nth dark ring is
A : √4nrλ
B : √4nr
C : √(2n-1)2rλ
D : √4nr/λ
Q.no 27. The current in a superconductor produces
A : zero, voltage drop across it
B : a strong, electric field around it
C : a small voltage drop across it
D : a large voltage drop across it
Q.no 28. Laevo-rotatory optically active substance rotates the plane of vibrations
A : In clockwise direction
B : In left hand side
C : By 1800
D : None of the above
Q.no 29. The intensity of central bright band in the case of diffraction is
A : maximum
B : minimum
C : varies between max to min
D : none of above
Q.no 30. Laser action is possible only if there is
A : a set of reflecting mirrors
B : a black body
C : population inversion
D : oscillations of laser source
Q.no 31. The speed of sound in medium depends upon
A : Amplitude
B : frequency
C : wavelength
D : properties of the medium
Q.no 32. In forward bias, the width of depletion region in a p-n junction diode
A : increases
B : decreases
C : remains constant
D : first (A) then (B)
Q.no 33. When the temperature of n- type semiconductor is increased
A : net negative charge increases
B : minority carriers decreases
C : electron-hole pairs increases
D : none of the above
Q.no 34. In a narrow wave packet of matter wave
A : The position of the particle cannot be determined accurately
B : The momentum of the particle cannot be determined accurately
C : Concept of wave group does not exist
D : Phase velocity is always zero
Q.no 35. Nanotechnology is the science of designing,creating and using the materials in which atleast one dimension has a size in the range of
A : 1nm-100nm
B : 0.01nm to 0.1 nm
C : 100 nm- 1000nm
D : 30- 50 nm
Q.no 36. If the gap between plano- convex lens and plane glass plate filled with the liquid instead of air then
A : Diameter of rings increases
B : Diameter of rings decreases
C : Diameter of rings does not change
D : All above are correct
Q.no 37. In a semiconductor, current conduction is due to
A : only holes
B : both holes and free electrons
C : only free electrons
D : none of the above
Q.no 38. Principal maxima for fraunhoffer single slit diffraction is obtained at ѳ
A : nλ
B : (n/2)π
C : 1
D : 0
Q.no 39. ln superconductivity, the conductivity of a material becomes.
A : zero
B : finite
C : infinite
D : None of the above
Q.no 40. In the P-type semiconductor, the hole concentration in valence band is----------- than the electron concentration in conduction band.
A : less than
B : greater than
C : equal to
D : all of these
Q.no 41. To check the optical flatness of the surface in wedge-shape thin film fringe-width must be
A : Equal, straight
B : Unequal, straight
C : Unequal, curved
D : Equal, curved
Q.no 42. Depletion layer consists of
A : electrons
B : mobile ions
C : protons.
D : immobile ions
Q.no 43. The light source used for optical pumping in Ruby laser is
A : Xenon
B : Argon
C : Neon
D : none of the above
Q.no 44. The Fermi level in intrinsic semiconductor lies exactly at the of the forbidden band
A : above
B : center
C : below
D : none of these
Q.no 45. _ _ _ _ _ superconductor is completely diamagnetic
A : Type - l
B : Type - ll
C : both
D : none of the above
Q.no 46. ln Magnetostriction Oscillator
A : a copper rod is used
B : a nickel rod is used
C : a magnesium rod is used
D : an aluminium rod is used
Q.no 47. The superconducting State is perfectly _ _ _ _ _ in nature.
A : Diamagnetic
B : Paramagnetic
C : Ferromagnetic
D : All above
Q.no 48. For an infinitely deep 1 dimentional potential well, a quantum particle in the ground state is likely to be found
A : at one corner of the well
B : At 1/4th and 3/4th distance from one end of the well
C : At every point in the well with equal probability
D : At the center of the well
Q.no 49. Quantum mechanically, minimum energy of a particle enclosed in a potential well cannot be
A : 1 eV
B : zero
C : 100 eV
D : 1 KeV
Q.no 50. Photovoltaic cells convert light energy into
A : solar energy
B : electrical energy
C : mechanical energy
D : kinetic energy
Q.no 51. The walls of the hall built for music concerns should
A : Amplify sound
B : Reflect sound
C : Transmit sound
D : D Absorb sound
Q.no 52. _________ superconductors are also called soft superconductors
A : Type I
B : Type II
C : Type III
D : Type IV
Q.no 53. When the light is incident at the polarizing angle, which of the following is completely polarized?
A : reflected light
B : refracted light
C : both reflected as well as refracted light
D : neither reflected nor refracted light
Q.no 54. Heisenberg Uncertainty Principle is significant for subatomic particles because
A : Their energy is small
B : They show wave particle duality
C : Their velocity is small
D : They show photoelectric effect
Q.no 55. The phenomenon in which the magnetic line of force are expelled out of the superconducting material at Critical temperature is called.
A : isotopic effect
B : Meissner effect
C : BCS * theory
D : London theory
Q.no 56. Heisenberg Uncertainty Principle is not significant for daily life objects because
A : The value of Planck's constant is insignificant for these particles
B : It is difficult to observe wave particle duality in daily life objects
C : Daily life objects are macroscopic
D : All of these
Q.no 57. Matter waves are associated with
A : Positively charged particles
B : Negatively charged particles
C : Neutral particles
D : All of these
Q.no 58. The reverberation time is the time required for the intensity to drop by
A : 30dB
B : 90dB
C : C 60dB
D : 120dB
Q.no 59. The effective path or phase difference between the reflected rays for antirefiection films
A : λ/4 or π/2
B : λ or π/2
C : λ/2 or π
D : 2λor π/2
Q.no 60. An echo is heard when direct sound waves coming from the source and its reflected wave reach the listener with a time interval of about
A : 1/14 seconds
B : 1/3 seconds
C : 1/7 seconds
D : 1/19 seconds
Answer for Question No 1. is c
Answer for Question No 2. is b
Answer for Question No 3. is c
Answer for Question No 4. is b
Answer for Question No 5. is d
Answer for Question No 6. is c
Answer for Question No 7. is c
Answer for Question No 8. is d
Answer for Question No 9. is b
Answer for Question No 10. is a
Answer for Question No 11. is a
Answer for Question No 12. is c
Answer for Question No 13. is b
Answer for Question No 14. is c
Answer for Question No 15. is b
Answer for Question No 16. is d
Answer for Question No 17. is a
Answer for Question No 18. is b
Answer for Question No 19. is d
Answer for Question No 20. is c
Answer for Question No 21. is a
Answer for Question No 22. is d
Answer for Question No 23. is b
Answer for Question No 24. is a
Answer for Question No 25. is a
Answer for Question No 26. is a
Answer for Question No 27. is a
Answer for Question No 28. is b
Answer for Question No 29. is a
Answer for Question No 30. is c
Answer for Question No 31. is d
Answer for Question No 32. is b
Answer for Question No 33. is c
Answer for Question No 34. is b
Answer for Question No 35. is a
Answer for Question No 36. is b
Answer for Question No 37. is c
Answer for Question No 38. is d
Answer for Question No 39. is c
Answer for Question No 40. is b
Answer for Question No 41. is a
Answer for Question No 42. is d
Answer for Question No 43. is a
Answer for Question No 44. is b
Answer for Question No 45. is a
Answer for Question No 46. is b
Answer for Question No 47. is a
Answer for Question No 48. is d
Answer for Question No 49. is b
Answer for Question No 50. is b
Answer for Question No 51. is d
Answer for Question No 52. is a
Answer for Question No 53. is a
Answer for Question No 54. is b
Answer for Question No 55. is b
Answer for Question No 56. is d
Answer for Question No 57. is d
Answer for Question No 58. is c
Answer for Question No 59. is c
Answer for Question No 60. is c
Seat No -
Total number of questions : 60
1000499 T1 ENGINEERING PHYSICS
Time : 1hr
Max Marks : 50
N.B
1) All questions are Multiple Choice Questions having single correct option.
2) Attempt any 50 questions out of 60.
3) Use of calculator is allowed.
4) Each question carries 1 Mark.
5) Specially abled students are allowed 20 minutes extra for examination.
6) Do not use pencils to darken answer.
7) Use only black/blue ball point pen to darken the appropriate circle.
8) No change will be allowed once the answer is marked on OMR Sheet.
9) Rough work shall not be done on OMR sheet or on question paper.
10) Darken ONLY ONE CIRCLE for each answer.
Q.no 1. When a ray is reflected from denser medium, its phase changes by(in radian)
A : 0
B : π
C : 2π
D : 3π
Q.no 2. Bending of light around the straight edge of obstacle and spreading into its geometrical shadow is called as
A : Diffraction
B : Interference
C : Polarization
D : Dispersion
Q.no 3. n type & p type silicon can be obtained by doping pure silicon with
A : Arsenic & Phosphorus
B : Indium & Aluminum
C : Phosphorus & Indium
D : Aluminum & Boron
Q.no 4. Types - l superconductors are ___________ temperature superconductor.
A : low
B : absolute
C : High
D : None of the Above
Q.no 5. According to the Malu’s law, the intensity of polarized light emerging through the analyzer varies as
A : I =Iₒ cosθ
B : I =Iₒ/cos2θ
C : I =Iₒ / cos²θ
D : I =Iₒ cos²θ
Q.no 6. Optimum reverberation time for music is
A : 0.5 sec
B : 0.1lsec
C : l.2sec
D : Above 5 sec
Q.no 7. ln superconductivity, the conductivity of a material becomes.
A : zero
B : finite
C : infinite
D : None of the above
Q.no 8. Which of the following will remain unchanged when a sound wave travels in air or in water?
A : Amplitude
B : frequency
C : wavelength
D : Speed
Q.no 9. A hologram is most similar to a
A : Dispersion
B : prism
C : 3-D photograph
D : compound lens
Q.no 10. The expression for the thickness of a half-wave plate of positive crystal is
A : t = λ / (μe - μo )
B : t = λ / 2(μe - μo )
C : t = λ / 3(μe - μo )
D : t = λ /2 (μo – μe )
Q.no 11. Pumping process used in diode laser is
A : optical pumping
B : forward biased voltage
C : electrical discharge
D : none of these
Q.no 12. Principal maxima for fraunhoffer single slit diffraction is obtained at ѳ
A : nλ
B : (n/2)π
C : 1
D : 0
Q.no 13. In a narrow wave packet of matter wave
A : The position of the particle cannot be determined accurately
B : The momentum of the particle cannot be determined accurately
C : Concept of wave group does not exist
D : Phase velocity is always zero
Q.no 14. Depletion layer consists of
A : electrons
B : mobile ions
C : protons.
D : immobile ions
Q.no 15. The quarter wave plate produces
A : Path difference of λ/4 or phase difference of π /2 radians between O- and E-waves
B : Path difference of λ /2 or phase difference of π /2 radians
C : Path difference of λ /4 or phase difference of π radians
D : None of the above
Q.no 16. If the material is reduced to nano size then properties of those materials _____________ from those of the bulk material
A : slightly differ
B : drastically differ
C : remain same
D : can’t say
Q.no 17. The speed of sound in medium depends upon
A : Amplitude
B : frequency
C : wavelength
D : properties of the medium
Q.no 18. In forward bias, the width of depletion region in a p-n junction diode
A : increases
B : decreases
C : remains constant
D : first (A) then (B)
Q.no 19. The impurity level in an extrinsic semiconductor is about of pure semiconductor
A : 10 atoms for 103 atoms
B : 10 atoms for 102 atoms
C : 1 atoms for 108 atoms
D : 1 atoms for 100 atom
Q.no 20. The Cooper pairs are electron pairs with
A : equal and same momentum
B : Unequal & same spin
C : Equal and opposite momentum and spin
D : Unequal & opposite spin and momentum
Q.no 21. At the critical temperature and less than critical temperature the resistance of a superconductor.
A : increase rapidly
B : decrease rapidly
C : remains zero
D : increase slowly
Q.no 22. In Newton’s ring experiment if the air film is replaced by water film, then the diameter of the ring
A : Decreases
B : Increases
C : Remains same
D : None of the above
Q.no 23. Loudness of sound is found to be proportional to the
A : log 10 L
B : log 10 I
C : area
D : log 10 s
Q.no 24. Depth sounding technique is based on principle of
A : Cavitations
B : navigation
C : reflection
D : echo sounding
Q.no 25. For constructive interference the path difference should be
A : Zero or odd multiple of wavelength
B : Only integral multiple of wavelength
C : 0
D : Zero or integral multiple of wavelength
Q.no 26. Effective path difference between two successive reflected rays by thin parallel film is
A : 2μtcosr+ λ/2
B : 0
C : 2μtcosr
D : 2μtcosr+n λ
Q.no 27. In the P-type semiconductor, the hole concentration in valence band is----------- than the electron concentration in conduction band.
A : less than
B : greater than
C : equal to
D : all of these
Q.no 28. Which of the following when added as an impurity into the silicon produces N-type semiconductor?
A : P
B : B
C : Al
D : Mg
Q.no 29. The light source used for optical pumping in Ruby laser is
A : Xenon
B : Argon
C : Neon
D : none of the above
Q.no 30. LASER is a short form of
A : Light attenuation by stimulated emission of radiation
B : Light amplification by stimulated emission of radiation
C : Light absorption by stimulated emission of radiation
D : Light absorption by spontaneous emission of radiation
Q.no 31. In case of ruby laser, optical resonator cavity is formed by the silvered ends of
A : Ruby crystal
B : The Calcium crystal
C : Tourmaline crystal
D : Quartz crystal
Q.no 32. In the Fresnel diffraction the incident wave front is
A : Spherical
B : Cylindrical
C : Spherical or cylindrical
D : Plane
Q.no 33. Ultrasonic waves are produced by
A : piezoelectric effect
B : Doppler effect
C : Peltier effect
D : magneto-optic effect
Q.no 34. The temperature at which conductivity of material becomes infinite is called.
A : Critical temperature
B : absolute temperature
C : Mean temperature
D : Crystallization temperature
Q.no 35. The minimum amount of current passed through the body of superconducter in order of destroy the superconductivity is called.
A : induced current
B : Critical current
C : Eddy current
D : super current
Q.no 36. The characteristics of laser beam are
A : Highly directional
B : Highly intense
C : Highly monochromatic
D : All of these
Q.no 37. Data storage capacities of hard disks and have led to small and faster microprocessors due to the use of ______________
A : Nanosized electronic components
B : Pure semiconductors
C : Capacitive components
D : Inductive components
Q.no 38. The active medium of a helium-neon laser is made up with ________ ratio of helium-neon.
A : 10:1
B : 10:3
C : 10:5
D : 10:6
Q.no 39. On reverse biasing the P-N junction,its depletion region becomes
A : narrow
B : zero
C : broad
D : constant
Q.no 40. _________ superconductors are also called soft superconductors
A : Type I
B : Type II
C : Type III
D : Type IV
Q.no 41. piezoelectric effect has been observed in
A : nickel
B : glass
C : quartz
D : mica
Q.no 42. Laser action is possible only if there is
A : a set of reflecting mirrors
B : a black body
C : population inversion
D : oscillations of laser source
Q.no 43. According to de Broglie hypothesis
A : A particle in rest has matter waves associated with it
B : A particle at rest or in motion has matter wave associated with it
C : A particle in motion has matter wave associated with it
D : All above statements are correct
Q.no 44. The main principle of optical fiber is
A : total internal dispersion
B : total internal reflection
C : total internal refraction
D : none of the above
Q.no 45. What would be true for wavelengths of De Broglie waves
A : λ (electron) = λ (proton)
B : λ (electron) > λ (proton)
C : λ (electron) < λ (proton)
D : λ (electron) ~ λ (proton)
Q.no 46. Reverberation time T of a hall varies is inversely proportional as the
A : density
B : degree of sensation
C : effective area
D : square of amplitude
Q.no 47. When the size of the material reduces, the surface area to volume ratio ________
A : decreases
B : Increases
C : remains same
D : becomes exactly equal to the volume
Q.no 48. Laevo-rotatory optically active substance rotates the plane of vibrations
A : In clockwise direction
B : In left hand side
C : By 1800
D : None of the above
Q.no 49. Plane polarized light can be produced by
A : Simple reflection
B : Pile of plates
C : Nicol’s prism
D : All of these
Q.no 50. Ψ is called the wave function of the particle. If |Ψ|2 is 0.1, the probability of finding the particle at a given location at a given time is
A : 0.1
B : (0.1)2
C : (0.1)1/2
D : None of these
Q.no 51. Which of the following cannot be polarized?
A : Radio waves
B : Sound waves
C : Light waves
D : X-rays
Q.no 52. The intensity of central bright band in the case of diffraction is
A : maximum
B : minimum
C : varies between max to min
D : none of above
Q.no 53. In an N-type semiconductor, donor level is
A : above the conduction band of the host
B : close to the conduction band of the host
C : close to the valence band of the host crystal.
D : below to the valence band of the host crystal
Q.no 54. Superconductivity was first observed by
A : Volta
B : Meissner
C : Kamerling Onnes
D : Schrieffer
Q.no 55. If the gap between plano- convex lens and plane glass plate filled with the liquid instead of air then
A : Diameter of rings increases
B : Diameter of rings decreases
C : Diameter of rings does not change
D : All above are correct
Q.no 56. The effective path or phase difference between the reflected rays for antirefiection films
A : λ/4 or π/2
B : λ or π/2
C : λ/2 or π
D : 2λor π/2
Q.no 57. An echo is heard when direct sound waves coming from the source and its reflected wave reach the listener with a time interval of about
A : 1/14 seconds
B : 1/3 seconds
C : 1/7 seconds
D : 1/19 seconds
Q.no 58. Ultrasonic are sound waves having frequency greater than
A : 20 MHz
B : 20 kHz
C : 20GHz
D : 20 Hz
Q.no 59. Velocity of sound wave is given by
A : v = f/λ
B : v = f.λ
C : v =λ/f
D : v = f/T
Q.no 60. Matter waves are associated with
A : Positively charged particles
B : Negatively charged particles
C : Neutral particles
D : All of these
Answer for Question No 1. is b
Answer for Question No 2. is a
Answer for Question No 3. is c
Answer for Question No 4. is a
Answer for Question No 5. is d
Answer for Question No 6. is c
Answer for Question No 7. is c
Answer for Question No 8. is b
Answer for Question No 9. is c
Answer for Question No 10. is b
Answer for Question No 11. is b
Answer for Question No 12. is d
Answer for Question No 13. is b
Answer for Question No 14. is d
Answer for Question No 15. is a
Answer for Question No 16. is b
Answer for Question No 17. is d
Answer for Question No 18. is b
Answer for Question No 19. is c
Answer for Question No 20. is c
Answer for Question No 21. is c
Answer for Question No 22. is a
Answer for Question No 23. is b
Answer for Question No 24. is d
Answer for Question No 25. is d
Answer for Question No 26. is a
Answer for Question No 27. is b
Answer for Question No 28. is a
Answer for Question No 29. is a
Answer for Question No 30. is b
Answer for Question No 31. is a
Answer for Question No 32. is a
Answer for Question No 33. is a
Answer for Question No 34. is a
Answer for Question No 35. is b
Answer for Question No 36. is d
Answer for Question No 37. is a
Answer for Question No 38. is a
Answer for Question No 39. is c
Answer for Question No 40. is a
Answer for Question No 41. is c
Answer for Question No 42. is c
Answer for Question No 43. is c
Answer for Question No 44. is b
Answer for Question No 45. is b
Answer for Question No 46. is c
Answer for Question No 47. is b
Answer for Question No 48. is b
Answer for Question No 49. is d
Answer for Question No 50. is a
Answer for Question No 51. is b
Answer for Question No 52. is a
Answer for Question No 53. is b
Answer for Question No 54. is a
Answer for Question No 55. is b
Answer for Question No 56. is c
Answer for Question No 57. is c
Answer for Question No 58. is b
Answer for Question No 59. is b
Answer for Question No 60. is d
Seat No -
Total number of questions : 60
1000499 T1 ENGINEERING PHYSICS
Time : 1hr
Max Marks : 50
N.B
1) All questions are Multiple Choice Questions having single correct option.
2) Attempt any 50 questions out of 60.
3) Use of calculator is allowed.
4) Each question carries 1 Mark.
5) Specially abled students are allowed 20 minutes extra for examination.
6) Do not use pencils to darken answer.
7) Use only black/blue ball point pen to darken the appropriate circle.
8) No change will be allowed once the answer is marked on OMR Sheet.
9) Rough work shall not be done on OMR sheet or on question paper.
10) Darken ONLY ONE CIRCLE for each answer.
Q.no 1. _________ superconductors are also called soft superconductors
A : Type I
B : Type II
C : Type III
D : Type IV
Q.no 2. If ne & nh are the number of electrons & holes in a semiconductor heavily doped with phosphorus, then
A : ne»nh
B : ne <nh
C : ne«nh
D : ne =nh
Q.no 3. The expression for the thickness of a half-wave plate of positive crystal is
A : t = λ / (μe - μo )
B : t = λ / 2(μe - μo )
C : t = λ / 3(μe - μo )
D : t = λ /2 (μo – μe )
Q.no 4. When the temperature of n- type semiconductor is increased
A : net negative charge increases
B : minority carriers decreases
C : electron-hole pairs increases
D : none of the above
Q.no 5. Laser action is possible only if there is
A : a set of reflecting mirrors
B : a black body
C : population inversion
D : oscillations of laser source
Q.no 6. Reverberation time T of a hall varies is inversely proportional as the
A : density
B : degree of sensation
C : effective area
D : square of amplitude
Q.no 7. Ψ is called the wave function of the particle. If |Ψ|2 is 0.1, the probability of finding the particle at a given location at a given time is
A : 0.1
B : (0.1)2
C : (0.1)1/2
D : None of these
Q.no 8. Matter waves would be more significant for particles having mass
A : About 10 x 103 g
B : About 10 x 10-14 g
C : About 10 x 1014 g
D : About 10 x 10 -28 g
Q.no 9. In a semiconductor, current conduction is due to
A : only holes
B : both holes and free electrons
C : only free electrons
D : none of the above
Q.no 10. For the Solar cell the ratio of maximum power delivered to ideal power is called as
A : Efficiency
B : Fill factor
C : short-circuit
D : Open-circuit
Q.no 11. The intensity of central bright band in the case of diffraction is
A : maximum
B : minimum
C : varies between max to min
D : none of above
Q.no 12. Current once initiated in a superconducting ring can continue to flow infinitely without any power losses
Is called
Is called
A : Infinite current
B : Critical current
C : Persistent current
D : induced current
Q.no 13. The phenomena of the echo is used to measure the
A : length of metal
B : flaws in metal
C : transfer signals
D : none
Q.no 14. _ _ _ _ _ superconductor is completely diamagnetic
A : Type - l
B : Type - ll
C : both
D : none of the above
Q.no 15. Types - l superconductors are ___________ temperature superconductor.
A : low
B : absolute
C : High
D : None of the Above
Q.no 16. What happens to O-ray and E-ray if they travel along the optic axis?
A : E-ray travels faster than O-ray
B : O-ray travels faster than E-ray
C : Both ray travels with same velocity
D : None of the above
Q.no 17. Principal maxima for fraunhoffer single slit diffraction is obtained at ѳ
A : nλ
B : (n/2)π
C : 1
D : 0
Q.no 18. According to the Malu’s law, the intensity of polarized light emerging through the analyzer varies as
A : I =Iₒ cosθ
B : I =Iₒ/cos2θ
C : I =Iₒ / cos²θ
D : I =Iₒ cos²θ
Q.no 19. De Broglie wave is expresssed in terms of Ψ. What is Ψ?
A : It is the energy of particles producing matter waves
B : It is the momentum of particles producing matter waves
C : It is the uncertainity in position of particles producing matter waves
D : It represents the oscillations of quantity that produces matter waves.
Q.no 20. Sound waves of frequency less than 20 Hz are called
A : longitudinal wave
B : ultrasonic wave
C : Infrasonic waves
D : mechanical wave
Q.no 21. Depth sounding technique is based on principle of
A : Cavitations
B : navigation
C : reflection
D : echo sounding
Q.no 22. Depletion layer consists of
A : electrons
B : mobile ions
C : protons.
D : immobile ions
Q.no 23. The quarter wave plate produces
A : Path difference of λ/4 or phase difference of π /2 radians between O- and E-waves
B : Path difference of λ /2 or phase difference of π /2 radians
C : Path difference of λ /4 or phase difference of π radians
D : None of the above
Q.no 24. For an infinitely deep 1 dimentional potential well, a quantum particle in the ground state is likely to be found
A : at one corner of the well
B : At 1/4th and 3/4th distance from one end of the well
C : At every point in the well with equal probability
D : At the center of the well
Q.no 25. In Fraunhoffer diffraction distance of slit from source and screen is
A : finite
B : infinite
C : parallel
D : not equal
Q.no 26. Bending of light around the straight edge of obstacle and spreading into its geometrical shadow is called as
A : Diffraction
B : Interference
C : Polarization
D : Dispersion
Q.no 27. A path difference of 3λ/2 between the two waves corresponds to the phase difference
A : 3π/2
B : π/3
C : 3π
D : 2π/3
Q.no 28. In Newton's rings the central spot is
A : Always bright
B : Always dark
C : Can be bright or dark
D : Of blue colour
Q.no 29. If the material is reduced to nano size then properties of those materials _____________ from those of the bulk material
A : slightly differ
B : drastically differ
C : remain same
D : can’t say
Q.no 30. The Cooper pairs are electron pairs with
A : equal and same momentum
B : Unequal & same spin
C : Equal and opposite momentum and spin
D : Unequal & opposite spin and momentum
Q.no 31. At the critical temperature and less than critical temperature the resistance of a superconductor.
A : increase rapidly
B : decrease rapidly
C : remains zero
D : increase slowly
Q.no 32. When the size of the material reduces, the surface area to volume ratio ________
A : decreases
B : Increases
C : remains same
D : becomes exactly equal to the volume
Q.no 33. Laevo-rotatory optically active substance rotates the plane of vibrations
A : In clockwise direction
B : In left hand side
C : By 1800
D : None of the above
Q.no 34. __________ are used in sunscreen lotions to protect the skin from ultraviolet radiations
A : Zinc oxide and Titanium oxide nanoparticles
B : Talcum stone particles
C : Non-metal nanoparticles
D : Quantum dots
Q.no 35. When a ray is reflected from denser medium, its phase changes by(in radian)
A : 0
B : π
C : 2π
D : 3π
Q.no 36. At 0 K, intrinsic semiconductor behaves as
A : a perfect conductor
B : a super conductor
C : a semiconductor
D : a perfect insulator
Q.no 37. Which of the following when added as an impurity into the silicon produces N-type semiconductor?
A : P
B : B
C : Al
D : Mg
Q.no 38. The normalization condition indicates that probabilities of finding the particle
A : in a small volume summed up over the entire space must give 1
B : in a small volume must give 1
C : in a small volume summed up along the positive direction must give 1
D : in a small volume summed up along the negative direction must give 1
Q.no 39. For constructive interference the path difference should be
A : Zero or odd multiple of wavelength
B : Only integral multiple of wavelength
C : 0
D : Zero or integral multiple of wavelength
Q.no 40. n type & p type silicon can be obtained by doping pure silicon with
A : Arsenic & Phosphorus
B : Indium & Aluminum
C : Phosphorus & Indium
D : Aluminum & Boron
Q.no 41. Which is the correct relation for forbidden energy gap in conductor, semi-conductor and insulator?
A : ΔEg conductor > ΔEg semiconductor> ΔEginsulator
B : ΔEgconductor > ΔEginsulator > Δ Eg semiconductor
C : ΔEginsulator > Δ Eg semiconductor > ΔEgconductor
D : ΔEg semiconductor > Δ Egconductor > ΔEginsulator
Q.no 42. The characteristics of laser beam are
A : Highly directional
B : Highly intense
C : Highly monochromatic
D : All of these
Q.no 43. Data storage capacities of hard disks and have led to small and faster microprocessors due to the use of ______________
A : Nanosized electronic components
B : Pure semiconductors
C : Capacitive components
D : Inductive components
Q.no 44. In case of ruby laser, optical resonator cavity is formed by the silvered ends of
A : Ruby crystal
B : The Calcium crystal
C : Tourmaline crystal
D : Quartz crystal
Q.no 45. The minimum amount of current passed through the body of superconducter in order of destroy the superconductivity is called.
A : induced current
B : Critical current
C : Eddy current
D : super current
Q.no 46. On reverse biasing the P-N junction,its depletion region becomes
A : narrow
B : zero
C : broad
D : constant
Q.no 47. Reverse bias applied on a junction diode-----------
A : raises the potential barrier
B : decrease the minority carrier current
C : increases the majority carrier current
D : lowers the potential barrier
Q.no 48. In Newton’s ring experiment if the air film is replaced by water film, then the diameter of the ring
A : Decreases
B : Increases
C : Remains same
D : None of the above
Q.no 49. According to de Broglie hypothesis equation λ=h/p is applicable for
A : Matter particle only
B : Photons only
C : Both matter particle and photon
D : All options are correct
Q.no 50. The forbidden energy gap in an insulator is of the order of
A : 1 eV
B : 2 eV
C : 0.1 eV
D : 5 eV
Q.no 51. In an N-type semiconductor, donor level is
A : above the conduction band of the host
B : close to the conduction band of the host
C : close to the valence band of the host crystal.
D : below to the valence band of the host crystal
Q.no 52. The intensity level expressed in a unit
A : bel
B : 10-12W/m2
C : Newton
D : db/m
Q.no 53. Formation of colour in a thin film of oil is due to
A : Interference of light waves
B : Diffraction of light waves
C : Scattering of light rays rays
D : Dispersion of light rays
Q.no 54. When the light is incident at the polarizing angle, which of the following is completely polarized?
A : reflected light
B : refracted light
C : both reflected as well as refracted light
D : neither reflected nor refracted light
Q.no 55. The points of constructive interference of light are
A : May be bright or dark
B : Always bright
C : Always dark
D : Neighter bight nor dark
Q.no 56. Intensity at any point on the screen at angle Ѳ for Fraunhoffer single slit is given by I
A : (n/2)π
B : Im(sinα/α)2
C : sin-1(nλ/a)
D : (sinα/α)2
Q.no 57. The basic principle of holography is
A : to create the interference pattern of object wave only
B : to create the interference pattern of reference wave only
C : to create the interference pattern of object wave and reference wave
D : none of the above
Q.no 58. Heisenberg Uncertainty Principle is not significant for daily life objects because
A : The value of Planck's constant is insignificant for these particles
B : It is difficult to observe wave particle duality in daily life objects
C : Daily life objects are macroscopic
D : All of these
Q.no 59. An echo is heard when direct sound waves coming from the source and its reflected wave reach the listener with a time interval of about
A : 1/14 seconds
B : 1/3 seconds
C : 1/7 seconds
D : 1/19 seconds
Q.no 60. Velocity of sound wave is given by
A : v = f/λ
B : v = f.λ
C : v =λ/f
D : v = f/T
Answer for Question No 1. is a
Answer for Question No 2. is a
Answer for Question No 3. is b
Answer for Question No 4. is c
Answer for Question No 5. is c
Answer for Question No 6. is c
Answer for Question No 7. is a
Answer for Question No 8. is d
Answer for Question No 9. is c
Answer for Question No 10. is b
Answer for Question No 11. is a
Answer for Question No 12. is c
Answer for Question No 13. is b
Answer for Question No 14. is a
Answer for Question No 15. is a
Answer for Question No 16. is c
Answer for Question No 17. is d
Answer for Question No 18. is d
Answer for Question No 19. is d
Answer for Question No 20. is c
Answer for Question No 21. is d
Answer for Question No 22. is d
Answer for Question No 23. is a
Answer for Question No 24. is d
Answer for Question No 25. is b
Answer for Question No 26. is a
Answer for Question No 27. is c
Answer for Question No 28. is b
Answer for Question No 29. is b
Answer for Question No 30. is c
Answer for Question No 31. is c
Answer for Question No 32. is b
Answer for Question No 33. is b
Answer for Question No 34. is a
Answer for Question No 35. is b
Answer for Question No 36. is d
Answer for Question No 37. is a
Answer for Question No 38. is a
Answer for Question No 39. is d
Answer for Question No 40. is c
Answer for Question No 41. is c
Answer for Question No 42. is d
Answer for Question No 43. is a
Answer for Question No 44. is a
Answer for Question No 45. is b
Answer for Question No 46. is c
Answer for Question No 47. is a
Answer for Question No 48. is a
Answer for Question No 49. is c
Answer for Question No 50. is d
Answer for Question No 51. is b
Answer for Question No 52. is a
Answer for Question No 53. is a
Answer for Question No 54. is a
Answer for Question No 55. is b
Answer for Question No 56. is b
Answer for Question No 57. is c
Answer for Question No 58. is d
Answer for Question No 59. is c
Answer for Question No 60. is b
Seat No -
Total number of questions : 60
1000499 T1 ENGINEERING PHYSICS
Time : 1hr
Max Marks : 50
N.B
1) All questions are Multiple Choice Questions having single correct option.
2) Attempt any 50 questions out of 60.
3) Use of calculator is allowed.
4) Each question carries 1 Mark.
5) Specially abled students are allowed 20 minutes extra for examination.
6) Do not use pencils to darken answer.
7) Use only black/blue ball point pen to darken the appropriate circle.
8) No change will be allowed once the answer is marked on OMR Sheet.
9) Rough work shall not be done on OMR sheet or on question paper.
10) Darken ONLY ONE CIRCLE for each answer.
Q.no 1. At 0 K, intrinsic semiconductor behaves as
A : a perfect conductor
B : a super conductor
C : a semiconductor
D : a perfect insulator
Q.no 2. LASER is a short form of
A : Light attenuation by stimulated emission of radiation
B : Light amplification by stimulated emission of radiation
C : Light absorption by stimulated emission of radiation
D : Light absorption by spontaneous emission of radiation
Q.no 3. In case of ruby laser, optical resonator cavity is formed by the silvered ends of
A : Ruby crystal
B : The Calcium crystal
C : Tourmaline crystal
D : Quartz crystal
Q.no 4. The quarter wave plate produces
A : Path difference of λ/4 or phase difference of π /2 radians between O- and E-waves
B : Path difference of λ /2 or phase difference of π /2 radians
C : Path difference of λ /4 or phase difference of π radians
D : None of the above
Q.no 5. In the Fresnel diffraction the incident wave front is
A : Spherical
B : Cylindrical
C : Spherical or cylindrical
D : Plane
Q.no 6. Bending of light around the straight edge of obstacle and spreading into its geometrical shadow is called as
A : Diffraction
B : Interference
C : Polarization
D : Dispersion
Q.no 7. To check the optical flatness of the surface in wedge-shape thin film fringe-width must be
A : Equal, straight
B : Unequal, straight
C : Unequal, curved
D : Equal, curved
Q.no 8. The intensity level expressed in a unit
A : bel
B : 10-12W/m2
C : Newton
D : db/m
Q.no 9. We prefer Polaroid sunglasses because they
A : have soothing colours
B : reduce the intensity of light
C : are cheaper
D : can change colour
Q.no 10. The walls of the hall built for music concerns should
A : Amplify sound
B : Reflect sound
C : Transmit sound
D : D Absorb sound
Q.no 11. If ne & nh are the number of electrons & holes in a semiconductor heavily doped with phosphorus, then
A : ne»nh
B : ne <nh
C : ne«nh
D : ne =nh
Q.no 12. Effective path difference between two successive reflected rays by thin parallel film is
A : 2μtcosr+ λ/2
B : 0
C : 2μtcosr
D : 2μtcosr+n λ
Q.no 13. On reverse biasing the P-N junction,its depletion region becomes
A : narrow
B : zero
C : broad
D : constant
Q.no 14. The forbidden energy gap in an insulator is of the order of
A : 1 eV
B : 2 eV
C : 0.1 eV
D : 5 eV
Q.no 15. The active medium of a helium-neon laser is made up with ________ ratio of helium-neon.
A : 10:1
B : 10:3
C : 10:5
D : 10:6
Q.no 16. The battery connection required to forward bias a p-n junction are
A : +ve terminal to p and —ve terminal to n
B : -ve terminal to p and —ve terminal to n
C : -ve terminal to p and +ve terminal to n
D : none of the above
Q.no 17. Data storage capacities of hard disks and have led to small and faster microprocessors due to the use of ______________
A : Nanosized electronic components
B : Pure semiconductors
C : Capacitive components
D : Inductive components
Q.no 18. What would be true for wavelengths of De Broglie waves
A : λ (electron) = λ (proton)
B : λ (electron) > λ (proton)
C : λ (electron) < λ (proton)
D : λ (electron) ~ λ (proton)
Q.no 19. piezoelectric effect has been observed in
A : nickel
B : glass
C : quartz
D : mica
Q.no 20. ln superconductivity, the conductivity of a material becomes.
A : zero
B : finite
C : infinite
D : None of the above
Q.no 21. Sound intensity is
A : energy/time
B : wb/m3
C : watt/m2
D : energy/time. area
Q.no 22. n type & p type silicon can be obtained by doping pure silicon with
A : Arsenic & Phosphorus
B : Indium & Aluminum
C : Phosphorus & Indium
D : Aluminum & Boron
Q.no 23. If the gap between plano- convex lens and plane glass plate filled with the liquid instead of air then
A : Diameter of rings increases
B : Diameter of rings decreases
C : Diameter of rings does not change
D : All above are correct
Q.no 24. The Fermi level in intrinsic semiconductor lies exactly at the of the forbidden band
A : above
B : center
C : below
D : none of these
Q.no 25. Formation of colour in a thin film of oil is due to
A : Interference of light waves
B : Diffraction of light waves
C : Scattering of light rays rays
D : Dispersion of light rays
Q.no 26. Reverberation time T of a hall varies is inversely proportional as the
A : density
B : degree of sensation
C : effective area
D : square of amplitude
Q.no 27. Which is the correct relation for forbidden energy gap in conductor, semi-conductor and insulator?
A : ΔEg conductor > ΔEg semiconductor> ΔEginsulator
B : ΔEgconductor > ΔEginsulator > Δ Eg semiconductor
C : ΔEginsulator > Δ Eg semiconductor > ΔEgconductor
D : ΔEg semiconductor > Δ Egconductor > ΔEginsulator
Q.no 28. When the temperature of n- type semiconductor is increased
A : net negative charge increases
B : minority carriers decreases
C : electron-hole pairs increases
D : none of the above
Q.no 29. The superconducting State is perfectly _ _ _ _ _ in nature.
A : Diamagnetic
B : Paramagnetic
C : Ferromagnetic
D : All above
Q.no 30. De Broglie wave is expresssed in terms of Ψ. What is Ψ?
A : It is the energy of particles producing matter waves
B : It is the momentum of particles producing matter waves
C : It is the uncertainity in position of particles producing matter waves
D : It represents the oscillations of quantity that produces matter waves.
Q.no 31. When the light is incident at the polarizing angle, which of the following is completely polarized?
A : reflected light
B : refracted light
C : both reflected as well as refracted light
D : neither reflected nor refracted light
Q.no 32. The current in a superconductor produces
A : zero, voltage drop across it
B : a strong, electric field around it
C : a small voltage drop across it
D : a large voltage drop across it
Q.no 33. _________ superconductors are also called soft superconductors
A : Type I
B : Type II
C : Type III
D : Type IV
Q.no 34. What happens to O-ray and E-ray if they travel along the optic axis?
A : E-ray travels faster than O-ray
B : O-ray travels faster than E-ray
C : Both ray travels with same velocity
D : None of the above
Q.no 35. The normalization condition indicates that probabilities of finding the particle
A : in a small volume summed up over the entire space must give 1
B : in a small volume must give 1
C : in a small volume summed up along the positive direction must give 1
D : in a small volume summed up along the negative direction must give 1
Q.no 36. The impurity level in an extrinsic semiconductor is about of pure semiconductor
A : 10 atoms for 103 atoms
B : 10 atoms for 102 atoms
C : 1 atoms for 108 atoms
D : 1 atoms for 100 atom
Q.no 37. Photovoltaic cells convert light energy into
A : solar energy
B : electrical energy
C : mechanical energy
D : kinetic energy
Q.no 38. The intensity of central bright band in the case of diffraction is
A : maximum
B : minimum
C : varies between max to min
D : none of above
Q.no 39. When the size of the material reduces, the surface area to volume ratio ________
A : decreases
B : Increases
C : remains same
D : becomes exactly equal to the volume
Q.no 40. Which of the following cannot be polarized?
A : Radio waves
B : Sound waves
C : Light waves
D : X-rays
Q.no 41. According to de Broglie hypothesis
A : A particle in rest has matter waves associated with it
B : A particle at rest or in motion has matter wave associated with it
C : A particle in motion has matter wave associated with it
D : All above statements are correct
Q.no 42. Which of the following when added as an impurity into the silicon produces N-type semiconductor?
A : P
B : B
C : Al
D : Mg
Q.no 43. Sound travel in the form of
A : longitudinal
B : transverse
C : mechanical
D : Infrasonic waves
Q.no 44. The characteristics of laser beam are
A : Highly directional
B : Highly intense
C : Highly monochromatic
D : All of these
Q.no 45. Plane polarized light can be produced by
A : Simple reflection
B : Pile of plates
C : Nicol’s prism
D : All of these
Q.no 46. A hologram is most similar to a
A : Dispersion
B : prism
C : 3-D photograph
D : compound lens
Q.no 47. The speed of sound in medium depends upon
A : Amplitude
B : frequency
C : wavelength
D : properties of the medium
Q.no 48. In a semiconductor, current conduction is due to
A : only holes
B : both holes and free electrons
C : only free electrons
D : none of the above
Q.no 49. Pumping process used in diode laser is
A : optical pumping
B : forward biased voltage
C : electrical discharge
D : none of these
Q.no 50. Principal maxima for fraunhoffer single slit diffraction is obtained at ѳ
A : nλ
B : (n/2)π
C : 1
D : 0
Q.no 51. The phenomenon in which the magnetic line of force are expelled out of the superconducting material at Critical temperature is called.
A : isotopic effect
B : Meissner effect
C : BCS * theory
D : London theory
Q.no 52. The light source used for optical pumping in Ruby laser is
A : Xenon
B : Argon
C : Neon
D : none of the above
Q.no 53. Ultrasonic waves are produced by
A : piezoelectric effect
B : Doppler effect
C : Peltier effect
D : magneto-optic effect
Q.no 54. The minimum amount of current passed through the body of superconducter in order of destroy the superconductivity is called.
A : induced current
B : Critical current
C : Eddy current
D : super current
Q.no 55. In forward bias, the width of depletion region in a p-n junction diode
A : increases
B : decreases
C : remains constant
D : first (A) then (B)
Q.no 56. Velocity of sound wave is given by
A : v = f/λ
B : v = f.λ
C : v =λ/f
D : v = f/T
Q.no 57. Heisenberg Uncertainty Principle is not significant for daily life objects because
A : The value of Planck's constant is insignificant for these particles
B : It is difficult to observe wave particle duality in daily life objects
C : Daily life objects are macroscopic
D : All of these
Q.no 58. The concept of wave function is insufficient to tell about probability of particle because
A : Wave function is negative at places of negative amplitude. Thus probability would come out to be negative which is meaningless.
B : Wave function is not single valued
C : Wave function is continuous. Ψ could have been considered as the sufficient function if it had been discontinuous.
D : Wave function directlty gives the uncertainty in position and not the probability.
Q.no 59. Schrodinger's equation is required for explaining behavior of subatomic particles because
A : Subatomic particles show wave particle duality
B : Matter wave is associated with subatomic waves
C : Newton's laws of motion cannot be applied to matter waves
D : All options are correct
Q.no 60. Ultrasonic are sound waves having frequency greater than
A : 20 MHz
B : 20 kHz
C : 20GHz
D : 20 Hz
Answer for Question No 1. is d
Answer for Question No 2. is b
Answer for Question No 3. is a
Answer for Question No 4. is a
Answer for Question No 5. is a
Answer for Question No 6. is a
Answer for Question No 7. is a
Answer for Question No 8. is a
Answer for Question No 9. is b
Answer for Question No 10. is d
Answer for Question No 11. is a
Answer for Question No 12. is a
Answer for Question No 13. is c
Answer for Question No 14. is d
Answer for Question No 15. is a
Answer for Question No 16. is a
Answer for Question No 17. is a
Answer for Question No 18. is b
Answer for Question No 19. is c
Answer for Question No 20. is c
Answer for Question No 21. is d
Answer for Question No 22. is c
Answer for Question No 23. is b
Answer for Question No 24. is b
Answer for Question No 25. is a
Answer for Question No 26. is c
Answer for Question No 27. is c
Answer for Question No 28. is c
Answer for Question No 29. is a
Answer for Question No 30. is d
Answer for Question No 31. is a
Answer for Question No 32. is a
Answer for Question No 33. is a
Answer for Question No 34. is c
Answer for Question No 35. is a
Answer for Question No 36. is c
Answer for Question No 37. is b
Answer for Question No 38. is a
Answer for Question No 39. is b
Answer for Question No 40. is b
Answer for Question No 41. is c
Answer for Question No 42. is a
Answer for Question No 43. is a
Answer for Question No 44. is d
Answer for Question No 45. is d
Answer for Question No 46. is c
Answer for Question No 47. is d
Answer for Question No 48. is c
Answer for Question No 49. is b
Answer for Question No 50. is d
Answer for Question No 51. is b
Answer for Question No 52. is a
Answer for Question No 53. is a
Answer for Question No 54. is b
Answer for Question No 55. is b
Answer for Question No 56. is b
Answer for Question No 57. is d
Answer for Question No 58. is a
Answer for Question No 59. is d
Answer for Question No 60. is b
Seat No -
Total number of questions : 60
1000499 T1 ENGINEERING PHYSICS
Time : 1hr
Max Marks : 50
N.B
1) All questions are Multiple Choice Questions having single correct option.
2) Attempt any 50 questions out of 60.
3) Use of calculator is allowed.
4) Each question carries 1 Mark.
5) Specially abled students are allowed 20 minutes extra for examination.
6) Do not use pencils to darken answer.
7) Use only black/blue ball point pen to darken the appropriate circle.
8) No change will be allowed once the answer is marked on OMR Sheet.
9) Rough work shall not be done on OMR sheet or on question paper.
10) Darken ONLY ONE CIRCLE for each answer.
Q.no 1. The speed of sound in medium depends upon
A : Amplitude
B : frequency
C : wavelength
D : properties of the medium
Q.no 2. The Fermi level in intrinsic semiconductor lies exactly at the of the forbidden band
A : above
B : center
C : below
D : none of these
Q.no 3. Sound waves of frequency less than 20 Hz are called
A : longitudinal wave
B : ultrasonic wave
C : Infrasonic waves
D : mechanical wave
Q.no 4. Photovoltaic cells convert light energy into
A : solar energy
B : electrical energy
C : mechanical energy
D : kinetic energy
Q.no 5. The walls of the hall built for music concerns should
A : Amplify sound
B : Reflect sound
C : Transmit sound
D : D Absorb sound
Q.no 6. The active medium of a helium-neon laser is made up with ________ ratio of helium-neon.
A : 10:1
B : 10:3
C : 10:5
D : 10:6
Q.no 7. When the size of the material is reduced to size in nano region, the energy band structure undergo______________which mainly accounts for the change in the properties of nanoparticles
A : Small variations
B : large variations
C : Splitting
D : scattering
Q.no 8. For the wavefunction to be true or acceptable, the following conditions are to be followed by it
A : Continuous
B : Finite
C : Normalizable
D : All of these
Q.no 9. The forbidden energy gap in an insulator is of the order of
A : 1 eV
B : 2 eV
C : 0.1 eV
D : 5 eV
Q.no 10. __________ are used in sunscreen lotions to protect the skin from ultraviolet radiations
A : Zinc oxide and Titanium oxide nanoparticles
B : Talcum stone particles
C : Non-metal nanoparticles
D : Quantum dots
Q.no 11. Which of the following will remain unchanged when a sound wave travels in air or in water?
A : Amplitude
B : frequency
C : wavelength
D : Speed
Q.no 12. We prefer Polaroid sunglasses because they
A : have soothing colours
B : reduce the intensity of light
C : are cheaper
D : can change colour
Q.no 13. ln superconductivity, the conductivity of a material becomes.
A : zero
B : finite
C : infinite
D : None of the above
Q.no 14. The characteristics of laser beam are
A : Highly directional
B : Highly intense
C : Highly monochromatic
D : All of these
Q.no 15. In a narrow wave packet of matter wave
A : The position of the particle cannot be determined accurately
B : The momentum of the particle cannot be determined accurately
C : Concept of wave group does not exist
D : Phase velocity is always zero
Q.no 16. The current in a superconductor produces
A : zero, voltage drop across it
B : a strong, electric field around it
C : a small voltage drop across it
D : a large voltage drop across it
Q.no 17. Optimum reverberation time for music is
A : 0.5 sec
B : 0.1lsec
C : l.2sec
D : Above 5 sec
Q.no 18. If the gap between plano- convex lens and plane glass plate filled with the liquid instead of air then
A : Diameter of rings increases
B : Diameter of rings decreases
C : Diameter of rings does not change
D : All above are correct
Q.no 19. When two semiconductors of p-type & n-type are brought in contact with each other, the P-N junction formed behaves like
A : an oscillator
B : an amplifier
C : a diode
D : a conductor
Q.no 20. Wave function Ψ represents
A : Potential energy of particles producing matter waves
B : Oscillations of quantity that produces matter waves
C : Momentum of particles that produces matter waves
D : Kinetic energy of particles producing matter waves
Q.no 21. At 0 K, intrinsic semiconductor behaves as
A : a perfect conductor
B : a super conductor
C : a semiconductor
D : a perfect insulator
Q.no 22. Principal maxima for fraunhoffer single slit diffraction is obtained at ѳ
A : nλ
B : (n/2)π
C : 1
D : 0
Q.no 23. When the size of the material reduces, the surface area to volume ratio ________
A : decreases
B : Increases
C : remains same
D : becomes exactly equal to the volume
Q.no 24. Data storage capacities of hard disks and have led to small and faster microprocessors due to the use of ______________
A : Nanosized electronic components
B : Pure semiconductors
C : Capacitive components
D : Inductive components
Q.no 25. Matter waves would be more significant for particles having mass
A : About 10 x 103 g
B : About 10 x 10-14 g
C : About 10 x 1014 g
D : About 10 x 10 -28 g
Q.no 26. In Newton’s ring experiment ,with air as a medium between Plano convex lens and glass plate, diameter of nth dark ring is
A : √4nrλ
B : √4nr
C : √(2n-1)2rλ
D : √4nr/λ
Q.no 27. What happens to O-ray and E-ray if they travel along the optic axis?
A : E-ray travels faster than O-ray
B : O-ray travels faster than E-ray
C : Both ray travels with same velocity
D : None of the above
Q.no 28. The phenomena of the echo is used to measure the
A : length of metal
B : flaws in metal
C : transfer signals
D : none
Q.no 29. Reverse bias applied on a junction diode-----------
A : raises the potential barrier
B : decrease the minority carrier current
C : increases the majority carrier current
D : lowers the potential barrier
Q.no 30. A path difference of 3λ/2 between the two waves corresponds to the phase difference
A : 3π/2
B : π/3
C : 3π
D : 2π/3
Q.no 31. Plane polarized light has vibrations
A : In one direction perpendicular to direction of propagation
B : Along the direction of propagation
C : In two directions perpendicular to direction of propagation
D : In all directions perpendicular to direction of propagation
Q.no 32. When a ray is reflected from denser medium, its phase changes by(in radian)
A : 0
B : π
C : 2π
D : 3π
Q.no 33. In forward bias, the width of depletion region in a p-n junction diode
A : increases
B : decreases
C : remains constant
D : first (A) then (B)
Q.no 34. In Fraunhoffer diffraction distance of slit from source and screen is
A : finite
B : infinite
C : parallel
D : not equal
Q.no 35. Types - l superconductors are ___________ temperature superconductor.
A : low
B : absolute
C : High
D : None of the Above
Q.no 36. Formation of colour in a thin film of oil is due to
A : Interference of light waves
B : Diffraction of light waves
C : Scattering of light rays rays
D : Dispersion of light rays
Q.no 37. Quantum mechanically, minimum energy of a particle enclosed in a potential well cannot be
A : 1 eV
B : zero
C : 100 eV
D : 1 KeV
Q.no 38. Reverberation time T of a hall varies is inversely proportional as the
A : density
B : degree of sensation
C : effective area
D : square of amplitude
Q.no 39. If the material is reduced to nano size then properties of those materials _____________ from those of the bulk material
A : slightly differ
B : drastically differ
C : remain same
D : can’t say
Q.no 40. According to de Broglie hypothesis
A : A particle in rest has matter waves associated with it
B : A particle at rest or in motion has matter wave associated with it
C : A particle in motion has matter wave associated with it
D : All above statements are correct
Q.no 41. The quarter wave plate produces
A : Path difference of λ/4 or phase difference of π /2 radians between O- and E-waves
B : Path difference of λ /2 or phase difference of π /2 radians
C : Path difference of λ /4 or phase difference of π radians
D : None of the above
Q.no 42. For constructive interference the path difference should be
A : Zero or odd multiple of wavelength
B : Only integral multiple of wavelength
C : 0
D : Zero or integral multiple of wavelength
Q.no 43. In the P-type semiconductor, the hole concentration in valence band is----------- than the electron concentration in conduction band.
A : less than
B : greater than
C : equal to
D : all of these
Q.no 44. Current once initiated in a superconducting ring can continue to flow infinitely without any power losses
Is called
Is called
A : Infinite current
B : Critical current
C : Persistent current
D : induced current
Q.no 45. According to the Malu’s law, the intensity of polarized light emerging through the analyzer varies as
A : I =Iₒ cosθ
B : I =Iₒ/cos2θ
C : I =Iₒ / cos²θ
D : I =Iₒ cos²θ
Q.no 46. On reverse biasing the P-N junction,its depletion region becomes
A : narrow
B : zero
C : broad
D : constant
Q.no 47. Nanotechnology is the science of designing,creating and using the materials in which atleast one dimension has a size in the range of
A : 1nm-100nm
B : 0.01nm to 0.1 nm
C : 100 nm- 1000nm
D : 30- 50 nm
Q.no 48. Loudness of sound is found to be proportional to the
A : log 10 L
B : log 10 I
C : area
D : log 10 s
Q.no 49. Depletion layer consists of
A : electrons
B : mobile ions
C : protons.
D : immobile ions
Q.no 50. At the critical temperature and less than critical temperature the resistance of a superconductor.
A : increase rapidly
B : decrease rapidly
C : remains zero
D : increase slowly
Q.no 51. The intensity of central bright band in the case of diffraction is
A : maximum
B : minimum
C : varies between max to min
D : none of above
Q.no 52. The temperature at which conductivity of material becomes infinite is called.
A : Critical temperature
B : absolute temperature
C : Mean temperature
D : Crystallization temperature
Q.no 53. Which is the correct relation for forbidden energy gap in conductor, semi-conductor and insulator?
A : ΔEg conductor > ΔEg semiconductor> ΔEginsulator
B : ΔEgconductor > ΔEginsulator > Δ Eg semiconductor
C : ΔEginsulator > Δ Eg semiconductor > ΔEgconductor
D : ΔEg semiconductor > Δ Egconductor > ΔEginsulator
Q.no 54. _________ superconductors are also called soft superconductors
A : Type I
B : Type II
C : Type III
D : Type IV
Q.no 55. A hologram is most similar to a
A : Dispersion
B : prism
C : 3-D photograph
D : compound lens
Q.no 56. The basic principle of holography is
A : to create the interference pattern of object wave only
B : to create the interference pattern of reference wave only
C : to create the interference pattern of object wave and reference wave
D : none of the above
Q.no 57. Velocity of sound wave is given by
A : v = f/λ
B : v = f.λ
C : v =λ/f
D : v = f/T
Q.no 58. The concept of wave function is insufficient to tell about probability of particle because
A : Wave function is negative at places of negative amplitude. Thus probability would come out to be negative which is meaningless.
B : Wave function is not single valued
C : Wave function is continuous. Ψ could have been considered as the sufficient function if it had been discontinuous.
D : Wave function directlty gives the uncertainty in position and not the probability.
Q.no 59. The effective path or phase difference between the reflected rays for antirefiection films
A : λ/4 or π/2
B : λ or π/2
C : λ/2 or π
D : 2λor π/2
Q.no 60. Matter waves are associated with
A : Positively charged particles
B : Negatively charged particles
C : Neutral particles
D : All of these
Answer for Question No 1. is d
Answer for Question No 2. is b
Answer for Question No 3. is c
Answer for Question No 4. is b
Answer for Question No 5. is d
Answer for Question No 6. is a
Answer for Question No 7. is b
Answer for Question No 8. is d
Answer for Question No 9. is d
Answer for Question No 10. is a
Answer for Question No 11. is b
Answer for Question No 12. is b
Answer for Question No 13. is c
Answer for Question No 14. is d
Answer for Question No 15. is b
Answer for Question No 16. is a
Answer for Question No 17. is c
Answer for Question No 18. is b
Answer for Question No 19. is c
Answer for Question No 20. is b
Answer for Question No 21. is d
Answer for Question No 22. is d
Answer for Question No 23. is b
Answer for Question No 24. is a
Answer for Question No 25. is d
Answer for Question No 26. is a
Answer for Question No 27. is c
Answer for Question No 28. is b
Answer for Question No 29. is a
Answer for Question No 30. is c
Answer for Question No 31. is a
Answer for Question No 32. is b
Answer for Question No 33. is b
Answer for Question No 34. is b
Answer for Question No 35. is a
Answer for Question No 36. is a
Answer for Question No 37. is b
Answer for Question No 38. is c
Answer for Question No 39. is b
Answer for Question No 40. is c
Answer for Question No 41. is a
Answer for Question No 42. is d
Answer for Question No 43. is b
Answer for Question No 44. is c
Answer for Question No 45. is d
Answer for Question No 46. is c
Answer for Question No 47. is a
Answer for Question No 48. is b
Answer for Question No 49. is d
Answer for Question No 50. is c
Answer for Question No 51. is a
Answer for Question No 52. is a
Answer for Question No 53. is c
Answer for Question No 54. is a
Answer for Question No 55. is c
Answer for Question No 56. is c
Answer for Question No 57. is b
Answer for Question No 58. is a
Answer for Question No 59. is c
Answer for Question No 60. is d
Seat No -
Total number of questions : 60
1000499 T1 ENGINEERING PHYSICS
Time : 1hr
Max Marks : 50
N.B
1) All questions are Multiple Choice Questions having single correct option.
2) Attempt any 50 questions out of 60.
3) Use of calculator is allowed.
4) Each question carries 1 Mark.
5) Specially abled students are allowed 20 minutes extra for examination.
6) Do not use pencils to darken answer.
7) Use only black/blue ball point pen to darken the appropriate circle.
8) No change will be allowed once the answer is marked on OMR Sheet.
9) Rough work shall not be done on OMR sheet or on question paper.
10) Darken ONLY ONE CIRCLE for each answer.
Q.no 1. Bending of light around the straight edge of obstacle and spreading into its geometrical shadow is called as
A : Diffraction
B : Interference
C : Polarization
D : Dispersion
Q.no 2. When two semiconductors of p-type & n-type are brought in contact with each other, the P-N junction formed behaves like
A : an oscillator
B : an amplifier
C : a diode
D : a conductor
Q.no 3. The speed of sound in medium depends upon
A : Amplitude
B : frequency
C : wavelength
D : properties of the medium
Q.no 4. Plane polarized light has vibrations
A : In one direction perpendicular to direction of propagation
B : Along the direction of propagation
C : In two directions perpendicular to direction of propagation
D : In all directions perpendicular to direction of propagation
Q.no 5. For an infinitely deep 1 dimentional potential well, a quantum particle in the ground state is likely to be found
A : at one corner of the well
B : At 1/4th and 3/4th distance from one end of the well
C : At every point in the well with equal probability
D : At the center of the well
Q.no 6. In a semiconductor, current conduction is due to
A : only holes
B : both holes and free electrons
C : only free electrons
D : none of the above
Q.no 7. ln Magnetostriction Oscillator
A : a copper rod is used
B : a nickel rod is used
C : a magnesium rod is used
D : an aluminium rod is used
Q.no 8. __________ are used in sunscreen lotions to protect the skin from ultraviolet radiations
A : Zinc oxide and Titanium oxide nanoparticles
B : Talcum stone particles
C : Non-metal nanoparticles
D : Quantum dots
Q.no 9. Matter waves would be more significant for particles having mass
A : About 10 x 103 g
B : About 10 x 10-14 g
C : About 10 x 1014 g
D : About 10 x 10 -28 g
Q.no 10. If the gap between plano- convex lens and plane glass plate filled with the liquid instead of air then
A : Diameter of rings increases
B : Diameter of rings decreases
C : Diameter of rings does not change
D : All above are correct
Q.no 11. Laevo-rotatory optically active substance rotates the plane of vibrations
A : In clockwise direction
B : In left hand side
C : By 1800
D : None of the above
Q.no 12. In an N-type semiconductor, donor level is
A : above the conduction band of the host
B : close to the conduction band of the host
C : close to the valence band of the host crystal.
D : below to the valence band of the host crystal
Q.no 13. We prefer Polaroid sunglasses because they
A : have soothing colours
B : reduce the intensity of light
C : are cheaper
D : can change colour
Q.no 14. The minimum amount of current passed through the body of superconducter in order of destroy the superconductivity is called.
A : induced current
B : Critical current
C : Eddy current
D : super current
Q.no 15. _________ superconductors are also called soft superconductors
A : Type I
B : Type II
C : Type III
D : Type IV
Q.no 16. Sound travel in the form of
A : longitudinal
B : transverse
C : mechanical
D : Infrasonic waves
Q.no 17. What happens to O-ray and E-ray if they travel along the optic axis?
A : E-ray travels faster than O-ray
B : O-ray travels faster than E-ray
C : Both ray travels with same velocity
D : None of the above
Q.no 18. According to de Broglie hypothesis
A : A particle in rest has matter waves associated with it
B : A particle at rest or in motion has matter wave associated with it
C : A particle in motion has matter wave associated with it
D : All above statements are correct
Q.no 19. Types - l superconductors are ___________ temperature superconductor.
A : low
B : absolute
C : High
D : None of the Above
Q.no 20. The main principle of optical fiber is
A : total internal dispersion
B : total internal reflection
C : total internal refraction
D : none of the above
Q.no 21. The walls of the hall built for music concerns should
A : Amplify sound
B : Reflect sound
C : Transmit sound
D : D Absorb sound
Q.no 22. Optimum reverberation time for music is
A : 0.5 sec
B : 0.1lsec
C : l.2sec
D : Above 5 sec
Q.no 23. Current once initiated in a superconducting ring can continue to flow infinitely without any power losses
Is called
Is called
A : Infinite current
B : Critical current
C : Persistent current
D : induced current
Q.no 24. Depletion layer consists of
A : electrons
B : mobile ions
C : protons.
D : immobile ions
Q.no 25. In the Fresnel diffraction the incident wave front is
A : Spherical
B : Cylindrical
C : Spherical or cylindrical
D : Plane
Q.no 26. LASER is a short form of
A : Light attenuation by stimulated emission of radiation
B : Light amplification by stimulated emission of radiation
C : Light absorption by stimulated emission of radiation
D : Light absorption by spontaneous emission of radiation
Q.no 27. The active medium of a helium-neon laser is made up with ________ ratio of helium-neon.
A : 10:1
B : 10:3
C : 10:5
D : 10:6
Q.no 28. Which is the correct relation for forbidden energy gap in conductor, semi-conductor and insulator?
A : ΔEg conductor > ΔEg semiconductor> ΔEginsulator
B : ΔEgconductor > ΔEginsulator > Δ Eg semiconductor
C : ΔEginsulator > Δ Eg semiconductor > ΔEgconductor
D : ΔEg semiconductor > Δ Egconductor > ΔEginsulator
Q.no 29. If ne & nh are the number of electrons & holes in a semiconductor heavily doped with phosphorus, then
A : ne»nh
B : ne <nh
C : ne«nh
D : ne =nh
Q.no 30. Reverse bias applied on a junction diode-----------
A : raises the potential barrier
B : decrease the minority carrier current
C : increases the majority carrier current
D : lowers the potential barrier
Q.no 31. Intensity of diffraction at an angle ѳ for fraunhoffer diffraction by grating is given by Iѳ
A : (sinNβ/ sinβ)
B : (sinβ)2
C : (sinα/α)2
D : Im(sinα/α)2 (sinNβ/ sinβ)2
Q.no 32. The Cooper pairs are electron pairs with
A : equal and same momentum
B : Unequal & same spin
C : Equal and opposite momentum and spin
D : Unequal & opposite spin and momentum
Q.no 33. At 0 K, intrinsic semiconductor behaves as
A : a perfect conductor
B : a super conductor
C : a semiconductor
D : a perfect insulator
Q.no 34. Wave function Ψ represents
A : Potential energy of particles producing matter waves
B : Oscillations of quantity that produces matter waves
C : Momentum of particles that produces matter waves
D : Kinetic energy of particles producing matter waves
Q.no 35. The intensity level expressed in a unit
A : bel
B : 10-12W/m2
C : Newton
D : db/m
Q.no 36. In a narrow wave packet of matter wave
A : The position of the particle cannot be determined accurately
B : The momentum of the particle cannot be determined accurately
C : Concept of wave group does not exist
D : Phase velocity is always zero
Q.no 37. The impurity level in an extrinsic semiconductor is about of pure semiconductor
A : 10 atoms for 103 atoms
B : 10 atoms for 102 atoms
C : 1 atoms for 108 atoms
D : 1 atoms for 100 atom
Q.no 38. When the temperature of n- type semiconductor is increased
A : net negative charge increases
B : minority carriers decreases
C : electron-hole pairs increases
D : none of the above
Q.no 39. n type & p type silicon can be obtained by doping pure silicon with
A : Arsenic & Phosphorus
B : Indium & Aluminum
C : Phosphorus & Indium
D : Aluminum & Boron
Q.no 40. In case of ruby laser, optical resonator cavity is formed by the silvered ends of
A : Ruby crystal
B : The Calcium crystal
C : Tourmaline crystal
D : Quartz crystal
Q.no 41. When the size of the material is reduced to size in nano region, the energy band structure undergo______________which mainly accounts for the change in the properties of nanoparticles
A : Small variations
B : large variations
C : Splitting
D : scattering
Q.no 42. The phenomena of the echo is used to measure the
A : length of metal
B : flaws in metal
C : transfer signals
D : none
Q.no 43. For the wavefunction to be true or acceptable, the following conditions are to be followed by it
A : Continuous
B : Finite
C : Normalizable
D : All of these
Q.no 44. Effective path difference between two successive reflected rays by thin parallel film is
A : 2μtcosr+ λ/2
B : 0
C : 2μtcosr
D : 2μtcosr+n λ
Q.no 45. When the light is incident at the polarizing angle, which of the following is completely polarized?
A : reflected light
B : refracted light
C : both reflected as well as refracted light
D : neither reflected nor refracted light
Q.no 46. The intensity of central bright band in the case of diffraction is
A : maximum
B : minimum
C : varies between max to min
D : none of above
Q.no 47. If the material is reduced to nano size then properties of those materials _____________ from those of the bulk material
A : slightly differ
B : drastically differ
C : remain same
D : can’t say
Q.no 48. Which of the following will remain unchanged when a sound wave travels in air or in water?
A : Amplitude
B : frequency
C : wavelength
D : Speed
Q.no 49. The phenomenon in which the magnetic line of force are expelled out of the superconducting material at Critical temperature is called.
A : isotopic effect
B : Meissner effect
C : BCS * theory
D : London theory
Q.no 50. _ _ _ _ _ superconductor is completely diamagnetic
A : Type - l
B : Type - ll
C : both
D : none of the above
Q.no 51. Formation of colour in a thin film of oil is due to
A : Interference of light waves
B : Diffraction of light waves
C : Scattering of light rays rays
D : Dispersion of light rays
Q.no 52. At the critical temperature and less than critical temperature the resistance of a superconductor.
A : increase rapidly
B : decrease rapidly
C : remains zero
D : increase slowly
Q.no 53. De Broglie wave is expresssed in terms of Ψ. What is Ψ?
A : It is the energy of particles producing matter waves
B : It is the momentum of particles producing matter waves
C : It is the uncertainity in position of particles producing matter waves
D : It represents the oscillations of quantity that produces matter waves.
Q.no 54. ln superconductivity, the conductivity of a material becomes.
A : zero
B : finite
C : infinite
D : None of the above
Q.no 55. The current in a superconductor produces
A : zero, voltage drop across it
B : a strong, electric field around it
C : a small voltage drop across it
D : a large voltage drop across it
Q.no 56. An echo is heard when direct sound waves coming from the source and its reflected wave reach the listener with a time interval of about
A : 1/14 seconds
B : 1/3 seconds
C : 1/7 seconds
D : 1/19 seconds
Q.no 57. The reverberation time is the time required for the intensity to drop by
A : 30dB
B : 90dB
C : C 60dB
D : 120dB
Q.no 58. The effective path or phase difference between the reflected rays for antirefiection films
A : λ/4 or π/2
B : λ or π/2
C : λ/2 or π
D : 2λor π/2
Q.no 59. Heisenberg Uncertainty Principle is not significant for daily life objects because
A : The value of Planck's constant is insignificant for these particles
B : It is difficult to observe wave particle duality in daily life objects
C : Daily life objects are macroscopic
D : All of these
Q.no 60. Ultrasonic are sound waves having frequency greater than
A : 20 MHz
B : 20 kHz
C : 20GHz
D : 20 Hz
Answer for Question No 1. is a
Answer for Question No 2. is c
Answer for Question No 3. is d
Answer for Question No 4. is a
Answer for Question No 5. is d
Answer for Question No 6. is c
Answer for Question No 7. is b
Answer for Question No 8. is a
Answer for Question No 9. is d
Answer for Question No 10. is b
Answer for Question No 11. is b
Answer for Question No 12. is b
Answer for Question No 13. is b
Answer for Question No 14. is b
Answer for Question No 15. is a
Answer for Question No 16. is a
Answer for Question No 17. is c
Answer for Question No 18. is c
Answer for Question No 19. is a
Answer for Question No 20. is b
Answer for Question No 21. is d
Answer for Question No 22. is c
Answer for Question No 23. is c
Answer for Question No 24. is d
Answer for Question No 25. is a
Answer for Question No 26. is b
Answer for Question No 27. is a
Answer for Question No 28. is c
Answer for Question No 29. is a
Answer for Question No 30. is a
Answer for Question No 31. is d
Answer for Question No 32. is c
Answer for Question No 33. is d
Answer for Question No 34. is b
Answer for Question No 35. is a
Answer for Question No 36. is b
Answer for Question No 37. is c
Answer for Question No 38. is c
Answer for Question No 39. is c
Answer for Question No 40. is a
Answer for Question No 41. is b
Answer for Question No 42. is b
Answer for Question No 43. is d
Answer for Question No 44. is a
Answer for Question No 45. is a
Answer for Question No 46. is a
Answer for Question No 47. is b
Answer for Question No 48. is b
Answer for Question No 49. is b
Answer for Question No 50. is a
Answer for Question No 51. is a
Answer for Question No 52. is c
Answer for Question No 53. is d
Answer for Question No 54. is c
Answer for Question No 55. is a
Answer for Question No 56. is c
Answer for Question No 57. is c
Answer for Question No 58. is c
Answer for Question No 59. is d
Answer for Question No 60. is b
Seat No -
Total number of questions : 60
1000499 T1 ENGINEERING PHYSICS
Time : 1hr
Max Marks : 50
N.B
1) All questions are Multiple Choice Questions having single correct option.
2) Attempt any 50 questions out of 60.
3) Use of calculator is allowed.
4) Each question carries 1 Mark.
5) Specially abled students are allowed 20 minutes extra for examination.
6) Do not use pencils to darken answer.
7) Use only black/blue ball point pen to darken the appropriate circle.
8) No change will be allowed once the answer is marked on OMR Sheet.
9) Rough work shall not be done on OMR sheet or on question paper.
10) Darken ONLY ONE CIRCLE for each answer.
Q.no 1. In Newton’s ring experiment if the air film is replaced by water film, then the diameter of the ring
A : Decreases
B : Increases
C : Remains same
D : None of the above
Q.no 2. The minimum amount of current passed through the body of superconducter in order of destroy the superconductivity is called.
A : induced current
B : Critical current
C : Eddy current
D : super current
Q.no 3. ln superconductivity, the conductivity of a material becomes.
A : zero
B : finite
C : infinite
D : None of the above
Q.no 4. Plane polarized light has vibrations
A : In one direction perpendicular to direction of propagation
B : Along the direction of propagation
C : In two directions perpendicular to direction of propagation
D : In all directions perpendicular to direction of propagation
Q.no 5. Reverse bias applied on a junction diode-----------
A : raises the potential barrier
B : decrease the minority carrier current
C : increases the majority carrier current
D : lowers the potential barrier
Q.no 6. For constructive interference the path difference should be
A : Zero or odd multiple of wavelength
B : Only integral multiple of wavelength
C : 0
D : Zero or integral multiple of wavelength
Q.no 7. The walls of the hall built for music concerns should
A : Amplify sound
B : Reflect sound
C : Transmit sound
D : D Absorb sound
Q.no 8. To check the optical flatness of the surface in wedge-shape thin film fringe-width must be
A : Equal, straight
B : Unequal, straight
C : Unequal, curved
D : Equal, curved
Q.no 9. In an N-type semiconductor, donor level is
A : above the conduction band of the host
B : close to the conduction band of the host
C : close to the valence band of the host crystal.
D : below to the valence band of the host crystal
Q.no 10. Which of the following cannot be polarized?
A : Radio waves
B : Sound waves
C : Light waves
D : X-rays
Q.no 11. If the material is reduced to nano size then properties of those materials _____________ from those of the bulk material
A : slightly differ
B : drastically differ
C : remain same
D : can’t say
Q.no 12. According to de Broglie hypothesis
A : A particle in rest has matter waves associated with it
B : A particle at rest or in motion has matter wave associated with it
C : A particle in motion has matter wave associated with it
D : All above statements are correct
Q.no 13. The battery connection required to forward bias a p-n junction are
A : +ve terminal to p and —ve terminal to n
B : -ve terminal to p and —ve terminal to n
C : -ve terminal to p and +ve terminal to n
D : none of the above
Q.no 14. Sound intensity is
A : energy/time
B : wb/m3
C : watt/m2
D : energy/time. area
Q.no 15. The main principle of optical fiber is
A : total internal dispersion
B : total internal reflection
C : total internal refraction
D : none of the above
Q.no 16. De Broglie wave is expresssed in terms of Ψ. What is Ψ?
A : It is the energy of particles producing matter waves
B : It is the momentum of particles producing matter waves
C : It is the uncertainity in position of particles producing matter waves
D : It represents the oscillations of quantity that produces matter waves.
Q.no 17. Wave function Ψ represents
A : Potential energy of particles producing matter waves
B : Oscillations of quantity that produces matter waves
C : Momentum of particles that produces matter waves
D : Kinetic energy of particles producing matter waves
Q.no 18. The Cooper pairs are electron pairs with
A : equal and same momentum
B : Unequal & same spin
C : Equal and opposite momentum and spin
D : Unequal & opposite spin and momentum
Q.no 19. Plane polarized light can be produced by
A : Simple reflection
B : Pile of plates
C : Nicol’s prism
D : All of these
Q.no 20. In a semiconductor, current conduction is due to
A : only holes
B : both holes and free electrons
C : only free electrons
D : none of the above
Q.no 21. When two semiconductors of p-type & n-type are brought in contact with each other, the P-N junction formed behaves like
A : an oscillator
B : an amplifier
C : a diode
D : a conductor
Q.no 22. n type & p type silicon can be obtained by doping pure silicon with
A : Arsenic & Phosphorus
B : Indium & Aluminum
C : Phosphorus & Indium
D : Aluminum & Boron
Q.no 23. LASER is a short form of
A : Light attenuation by stimulated emission of radiation
B : Light amplification by stimulated emission of radiation
C : Light absorption by stimulated emission of radiation
D : Light absorption by spontaneous emission of radiation
Q.no 24. For the wavefunction to be true or acceptable, the following conditions are to be followed by it
A : Continuous
B : Finite
C : Normalizable
D : All of these
Q.no 25. Reverberation time T of a hall varies is inversely proportional as the
A : density
B : degree of sensation
C : effective area
D : square of amplitude
Q.no 26. When a ray is reflected from denser medium, its phase changes by(in radian)
A : 0
B : π
C : 2π
D : 3π
Q.no 27. Laser action is possible only if there is
A : a set of reflecting mirrors
B : a black body
C : population inversion
D : oscillations of laser source
Q.no 28. Current once initiated in a superconducting ring can continue to flow infinitely without any power losses
Is called
Is called
A : Infinite current
B : Critical current
C : Persistent current
D : induced current
Q.no 29. Depth sounding technique is based on principle of
A : Cavitations
B : navigation
C : reflection
D : echo sounding
Q.no 30. The intensity level expressed in a unit
A : bel
B : 10-12W/m2
C : Newton
D : db/m
Q.no 31. At the critical temperature and less than critical temperature the resistance of a superconductor.
A : increase rapidly
B : decrease rapidly
C : remains zero
D : increase slowly
Q.no 32. According to de Broglie hypothesis equation λ=h/p is applicable for
A : Matter particle only
B : Photons only
C : Both matter particle and photon
D : All options are correct
Q.no 33. The phenomenon in which the magnetic line of force are expelled out of the superconducting material at Critical temperature is called.
A : isotopic effect
B : Meissner effect
C : BCS * theory
D : London theory
Q.no 34. Principal maxima for fraunhoffer single slit diffraction is obtained at ѳ
A : nλ
B : (n/2)π
C : 1
D : 0
Q.no 35. When the size of the material is reduced to size in nano region, the energy band structure undergo______________which mainly accounts for the change in the properties of nanoparticles
A : Small variations
B : large variations
C : Splitting
D : scattering
Q.no 36. Optimum reverberation time for music is
A : 0.5 sec
B : 0.1lsec
C : l.2sec
D : Above 5 sec
Q.no 37. Loudness of sound is found to be proportional to the
A : log 10 L
B : log 10 I
C : area
D : log 10 s
Q.no 38. Intensity of diffraction at an angle ѳ for fraunhoffer diffraction by grating is given by Iѳ
A : (sinNβ/ sinβ)
B : (sinβ)2
C : (sinα/α)2
D : Im(sinα/α)2 (sinNβ/ sinβ)2
Q.no 39. The temperature at which conductivity of material becomes infinite is called.
A : Critical temperature
B : absolute temperature
C : Mean temperature
D : Crystallization temperature
Q.no 40. The superconducting State is perfectly _ _ _ _ _ in nature.
A : Diamagnetic
B : Paramagnetic
C : Ferromagnetic
D : All above
Q.no 41. Sound travel in the form of
A : longitudinal
B : transverse
C : mechanical
D : Infrasonic waves
Q.no 42. Depletion layer consists of
A : electrons
B : mobile ions
C : protons.
D : immobile ions
Q.no 43. A path difference of 3λ/2 between the two waves corresponds to the phase difference
A : 3π/2
B : π/3
C : 3π
D : 2π/3
Q.no 44. If the gap between plano- convex lens and plane glass plate filled with the liquid instead of air then
A : Diameter of rings increases
B : Diameter of rings decreases
C : Diameter of rings does not change
D : All above are correct
Q.no 45. For an infinitely deep 1 dimentional potential well, a quantum particle in the ground state is likely to be found
A : at one corner of the well
B : At 1/4th and 3/4th distance from one end of the well
C : At every point in the well with equal probability
D : At the center of the well
Q.no 46. Nanotechnology is the science of designing,creating and using the materials in which atleast one dimension has a size in the range of
A : 1nm-100nm
B : 0.01nm to 0.1 nm
C : 100 nm- 1000nm
D : 30- 50 nm
Q.no 47. Fringe width is defined as the distance between two consecutive
A : Crests
B : Bright fringes only
C : Dark fringes only
D : Bright or dark fringes
Q.no 48. In Newton's rings the central spot is
A : Always bright
B : Always dark
C : Can be bright or dark
D : Of blue colour
Q.no 49. __________ are used in sunscreen lotions to protect the skin from ultraviolet radiations
A : Zinc oxide and Titanium oxide nanoparticles
B : Talcum stone particles
C : Non-metal nanoparticles
D : Quantum dots
Q.no 50. For the Solar cell the ratio of maximum power delivered to ideal power is called as
A : Efficiency
B : Fill factor
C : short-circuit
D : Open-circuit
Q.no 51. On reverse biasing the P-N junction,its depletion region becomes
A : narrow
B : zero
C : broad
D : constant
Q.no 52. In Newton’s ring experiment ,with air as a medium between Plano convex lens and glass plate, diameter of nth dark ring is
A : √4nrλ
B : √4nr
C : √(2n-1)2rλ
D : √4nr/λ
Q.no 53. Quantum mechanically, minimum energy of a particle enclosed in a potential well cannot be
A : 1 eV
B : zero
C : 100 eV
D : 1 KeV
Q.no 54. Effective path difference between two successive reflected rays by thin parallel film is
A : 2μtcosr+ λ/2
B : 0
C : 2μtcosr
D : 2μtcosr+n λ
Q.no 55. Which of the following will remain unchanged when a sound wave travels in air or in water?
A : Amplitude
B : frequency
C : wavelength
D : Speed
Q.no 56. Intensity at any point on the screen at angle Ѳ for Fraunhoffer single slit is given by I
A : (n/2)π
B : Im(sinα/α)2
C : sin-1(nλ/a)
D : (sinα/α)2
Q.no 57. Heisenberg Uncertainty Principle is not significant for daily life objects because
A : The value of Planck's constant is insignificant for these particles
B : It is difficult to observe wave particle duality in daily life objects
C : Daily life objects are macroscopic
D : All of these
Q.no 58. An echo is heard when direct sound waves coming from the source and its reflected wave reach the listener with a time interval of about
A : 1/14 seconds
B : 1/3 seconds
C : 1/7 seconds
D : 1/19 seconds
Q.no 59. Ultrasonic are sound waves having frequency greater than
A : 20 MHz
B : 20 kHz
C : 20GHz
D : 20 Hz
Q.no 60. The reverberation time is the time required for the intensity to drop by
A : 30dB
B : 90dB
C : C 60dB
D : 120dB
Answer for Question No 1. is a
Answer for Question No 2. is b
Answer for Question No 3. is c
Answer for Question No 4. is a
Answer for Question No 5. is a
Answer for Question No 6. is d
Answer for Question No 7. is d
Answer for Question No 8. is a
Answer for Question No 9. is b
Answer for Question No 10. is b
Answer for Question No 11. is b
Answer for Question No 12. is c
Answer for Question No 13. is a
Answer for Question No 14. is d
Answer for Question No 15. is b
Answer for Question No 16. is d
Answer for Question No 17. is b
Answer for Question No 18. is c
Answer for Question No 19. is d
Answer for Question No 20. is c
Answer for Question No 21. is c
Answer for Question No 22. is c
Answer for Question No 23. is b
Answer for Question No 24. is d
Answer for Question No 25. is c
Answer for Question No 26. is b
Answer for Question No 27. is c
Answer for Question No 28. is c
Answer for Question No 29. is d
Answer for Question No 30. is a
Answer for Question No 31. is c
Answer for Question No 32. is c
Answer for Question No 33. is b
Answer for Question No 34. is d
Answer for Question No 35. is b
Answer for Question No 36. is c
Answer for Question No 37. is b
Answer for Question No 38. is d
Answer for Question No 39. is a
Answer for Question No 40. is a
Answer for Question No 41. is a
Answer for Question No 42. is d
Answer for Question No 43. is c
Answer for Question No 44. is b
Answer for Question No 45. is d
Answer for Question No 46. is a
Answer for Question No 47. is d
Answer for Question No 48. is b
Answer for Question No 49. is a
Answer for Question No 50. is b
Answer for Question No 51. is c
Answer for Question No 52. is a
Answer for Question No 53. is b
Answer for Question No 54. is a
Answer for Question No 55. is b
Answer for Question No 56. is b
Answer for Question No 57. is d
Answer for Question No 58. is c
Answer for Question No 59. is b
Answer for Question No 60. is c
Seat No -
Total number of questions : 60
1000499 T1 ENGINEERING PHYSICS
Time : 1hr
Max Marks : 50
N.B
1) All questions are Multiple Choice Questions having single correct option.
2) Attempt any 50 questions out of 60.
3) Use of calculator is allowed.
4) Each question carries 1 Mark.
5) Specially abled students are allowed 20 minutes extra for examination.
6) Do not use pencils to darken answer.
7) Use only black/blue ball point pen to darken the appropriate circle.
8) No change will be allowed once the answer is marked on OMR Sheet.
9) Rough work shall not be done on OMR sheet or on question paper.
10) Darken ONLY ONE CIRCLE for each answer.
Q.no 1. According to de Broglie hypothesis
A : A particle in rest has matter waves associated with it
B : A particle at rest or in motion has matter wave associated with it
C : A particle in motion has matter wave associated with it
D : All above statements are correct
Q.no 2. Reverberation time T of a hall varies is inversely proportional as the
A : density
B : degree of sensation
C : effective area
D : square of amplitude
Q.no 3. The light source used for optical pumping in Ruby laser is
A : Xenon
B : Argon
C : Neon
D : none of the above
Q.no 4. Matter waves would be more significant for particles having mass
A : About 10 x 103 g
B : About 10 x 10-14 g
C : About 10 x 1014 g
D : About 10 x 10 -28 g
Q.no 5. The phenomenon in which the magnetic line of force are expelled out of the superconducting material at Critical temperature is called.
A : isotopic effect
B : Meissner effect
C : BCS * theory
D : London theory
Q.no 6. Depth sounding technique is based on principle of
A : Cavitations
B : navigation
C : reflection
D : echo sounding
Q.no 7. In Newton's rings the central spot is
A : Always bright
B : Always dark
C : Can be bright or dark
D : Of blue colour
Q.no 8. In Newton’s ring experiment if the air film is replaced by water film, then the diameter of the ring
A : Decreases
B : Increases
C : Remains same
D : None of the above
Q.no 9. In forward bias, the width of depletion region in a p-n junction diode
A : increases
B : decreases
C : remains constant
D : first (A) then (B)
Q.no 10. piezoelectric effect has been observed in
A : nickel
B : glass
C : quartz
D : mica
Q.no 11. Which of the following when added as an impurity into the silicon produces N-type semiconductor?
A : P
B : B
C : Al
D : Mg
Q.no 12. Sound waves of frequency less than 20 Hz are called
A : longitudinal wave
B : ultrasonic wave
C : Infrasonic waves
D : mechanical wave
Q.no 13. The Fermi level in intrinsic semiconductor lies exactly at the of the forbidden band
A : above
B : center
C : below
D : none of these
Q.no 14. A path difference of 3λ/2 between the two waves corresponds to the phase difference
A : 3π/2
B : π/3
C : 3π
D : 2π/3
Q.no 15. When a ray is reflected from denser medium, its phase changes by(in radian)
A : 0
B : π
C : 2π
D : 3π
Q.no 16. Superconductivity was first observed by
A : Volta
B : Meissner
C : Kamerling Onnes
D : Schrieffer
Q.no 17. Intensity of diffraction at an angle ѳ for fraunhoffer diffraction by grating is given by Iѳ
A : (sinNβ/ sinβ)
B : (sinβ)2
C : (sinα/α)2
D : Im(sinα/α)2 (sinNβ/ sinβ)2
Q.no 18. The characteristics of laser beam are
A : Highly directional
B : Highly intense
C : Highly monochromatic
D : All of these
Q.no 19. A hologram is most similar to a
A : Dispersion
B : prism
C : 3-D photograph
D : compound lens
Q.no 20. The battery connection required to forward bias a p-n junction are
A : +ve terminal to p and —ve terminal to n
B : -ve terminal to p and —ve terminal to n
C : -ve terminal to p and +ve terminal to n
D : none of the above
Q.no 21. In the Fresnel diffraction the incident wave front is
A : Spherical
B : Cylindrical
C : Spherical or cylindrical
D : Plane
Q.no 22. __________ are used in sunscreen lotions to protect the skin from ultraviolet radiations
A : Zinc oxide and Titanium oxide nanoparticles
B : Talcum stone particles
C : Non-metal nanoparticles
D : Quantum dots
Q.no 23. When the size of the material is reduced to size in nano region, the energy band structure undergo______________which mainly accounts for the change in the properties of nanoparticles
A : Small variations
B : large variations
C : Splitting
D : scattering
Q.no 24. On reverse biasing the P-N junction,its depletion region becomes
A : narrow
B : zero
C : broad
D : constant
Q.no 25. In Newton’s ring experiment ,with air as a medium between Plano convex lens and glass plate, diameter of nth dark ring is
A : √4nrλ
B : √4nr
C : √(2n-1)2rλ
D : √4nr/λ
Q.no 26. If the gap between plano- convex lens and plane glass plate filled with the liquid instead of air then
A : Diameter of rings increases
B : Diameter of rings decreases
C : Diameter of rings does not change
D : All above are correct
Q.no 27. Pumping process used in diode laser is
A : optical pumping
B : forward biased voltage
C : electrical discharge
D : none of these
Q.no 28. Sound travel in the form of
A : longitudinal
B : transverse
C : mechanical
D : Infrasonic waves
Q.no 29. Principal maxima for fraunhoffer single slit diffraction is obtained at ѳ
A : nλ
B : (n/2)π
C : 1
D : 0
Q.no 30. The main principle of optical fiber is
A : total internal dispersion
B : total internal reflection
C : total internal refraction
D : none of the above
Q.no 31. ln Magnetostriction Oscillator
A : a copper rod is used
B : a nickel rod is used
C : a magnesium rod is used
D : an aluminium rod is used
Q.no 32. The intensity level expressed in a unit
A : bel
B : 10-12W/m2
C : Newton
D : db/m
Q.no 33. When the light is incident at the polarizing angle, which of the following is completely polarized?
A : reflected light
B : refracted light
C : both reflected as well as refracted light
D : neither reflected nor refracted light
Q.no 34. In a narrow wave packet of matter wave
A : The position of the particle cannot be determined accurately
B : The momentum of the particle cannot be determined accurately
C : Concept of wave group does not exist
D : Phase velocity is always zero
Q.no 35. When two semiconductors of p-type & n-type are brought in contact with each other, the P-N junction formed behaves like
A : an oscillator
B : an amplifier
C : a diode
D : a conductor
Q.no 36. The phenomena of the echo is used to measure the
A : length of metal
B : flaws in metal
C : transfer signals
D : none
Q.no 37. The intensity of central bright band in the case of diffraction is
A : maximum
B : minimum
C : varies between max to min
D : none of above
Q.no 38. _________ superconductors are also called soft superconductors
A : Type I
B : Type II
C : Type III
D : Type IV
Q.no 39. Laser action is possible only if there is
A : a set of reflecting mirrors
B : a black body
C : population inversion
D : oscillations of laser source
Q.no 40. _ _ _ _ _ superconductor is completely diamagnetic
A : Type - l
B : Type - ll
C : both
D : none of the above
Q.no 41. Plane polarized light has vibrations
A : In one direction perpendicular to direction of propagation
B : Along the direction of propagation
C : In two directions perpendicular to direction of propagation
D : In all directions perpendicular to direction of propagation
Q.no 42. Ultrasonic waves are produced by
A : piezoelectric effect
B : Doppler effect
C : Peltier effect
D : magneto-optic effect
Q.no 43. Loudness of sound is found to be proportional to the
A : log 10 L
B : log 10 I
C : area
D : log 10 s
Q.no 44. De Broglie wave is expresssed in terms of Ψ. What is Ψ?
A : It is the energy of particles producing matter waves
B : It is the momentum of particles producing matter waves
C : It is the uncertainity in position of particles producing matter waves
D : It represents the oscillations of quantity that produces matter waves.
Q.no 45. Laevo-rotatory optically active substance rotates the plane of vibrations
A : In clockwise direction
B : In left hand side
C : By 1800
D : None of the above
Q.no 46. Which of the following cannot be polarized?
A : Radio waves
B : Sound waves
C : Light waves
D : X-rays
Q.no 47. For the wavefunction to be true or acceptable, the following conditions are to be followed by it
A : Continuous
B : Finite
C : Normalizable
D : All of these
Q.no 48. The points of constructive interference of light are
A : May be bright or dark
B : Always bright
C : Always dark
D : Neighter bight nor dark
Q.no 49. To check the optical flatness of the surface in wedge-shape thin film fringe-width must be
A : Equal, straight
B : Unequal, straight
C : Unequal, curved
D : Equal, curved
Q.no 50. The normalization condition indicates that probabilities of finding the particle
A : in a small volume summed up over the entire space must give 1
B : in a small volume must give 1
C : in a small volume summed up along the positive direction must give 1
D : in a small volume summed up along the negative direction must give 1
Q.no 51. At 0 K, intrinsic semiconductor behaves as
A : a perfect conductor
B : a super conductor
C : a semiconductor
D : a perfect insulator
Q.no 52. The active medium of a helium-neon laser is made up with ________ ratio of helium-neon.
A : 10:1
B : 10:3
C : 10:5
D : 10:6
Q.no 53. According to the Malu’s law, the intensity of polarized light emerging through the analyzer varies as
A : I =Iₒ cosθ
B : I =Iₒ/cos2θ
C : I =Iₒ / cos²θ
D : I =Iₒ cos²θ
Q.no 54. n type & p type silicon can be obtained by doping pure silicon with
A : Arsenic & Phosphorus
B : Indium & Aluminum
C : Phosphorus & Indium
D : Aluminum & Boron
Q.no 55. The quarter wave plate produces
A : Path difference of λ/4 or phase difference of π /2 radians between O- and E-waves
B : Path difference of λ /2 or phase difference of π /2 radians
C : Path difference of λ /4 or phase difference of π radians
D : None of the above
Q.no 56. The reverberation time is the time required for the intensity to drop by
A : 30dB
B : 90dB
C : C 60dB
D : 120dB
Q.no 57. Heisenberg Uncertainty Principle is not significant for daily life objects because
A : The value of Planck's constant is insignificant for these particles
B : It is difficult to observe wave particle duality in daily life objects
C : Daily life objects are macroscopic
D : All of these
Q.no 58. Velocity of sound wave is given by
A : v = f/λ
B : v = f.λ
C : v =λ/f
D : v = f/T
Q.no 59. Intensity at any point on the screen at angle Ѳ for Fraunhoffer single slit is given by I
A : (n/2)π
B : Im(sinα/α)2
C : sin-1(nλ/a)
D : (sinα/α)2
Q.no 60. The concept of wave function is insufficient to tell about probability of particle because
A : Wave function is negative at places of negative amplitude. Thus probability would come out to be negative which is meaningless.
B : Wave function is not single valued
C : Wave function is continuous. Ψ could have been considered as the sufficient function if it had been discontinuous.
D : Wave function directlty gives the uncertainty in position and not the probability.
Answer for Question No 1. is c
Answer for Question No 2. is c
Answer for Question No 3. is a
Answer for Question No 4. is d
Answer for Question No 5. is b
Answer for Question No 6. is d
Answer for Question No 7. is b
Answer for Question No 8. is a
Answer for Question No 9. is b
Answer for Question No 10. is c
Answer for Question No 11. is a
Answer for Question No 12. is c
Answer for Question No 13. is b
Answer for Question No 14. is c
Answer for Question No 15. is b
Answer for Question No 16. is a
Answer for Question No 17. is d
Answer for Question No 18. is d
Answer for Question No 19. is c
Answer for Question No 20. is a
Answer for Question No 21. is a
Answer for Question No 22. is a
Answer for Question No 23. is b
Answer for Question No 24. is c
Answer for Question No 25. is a
Answer for Question No 26. is b
Answer for Question No 27. is b
Answer for Question No 28. is a
Answer for Question No 29. is d
Answer for Question No 30. is b
Answer for Question No 31. is b
Answer for Question No 32. is a
Answer for Question No 33. is a
Answer for Question No 34. is b
Answer for Question No 35. is c
Answer for Question No 36. is b
Answer for Question No 37. is a
Answer for Question No 38. is a
Answer for Question No 39. is c
Answer for Question No 40. is a
Answer for Question No 41. is a
Answer for Question No 42. is a
Answer for Question No 43. is b
Answer for Question No 44. is d
Answer for Question No 45. is b
Answer for Question No 46. is b
Answer for Question No 47. is d
Answer for Question No 48. is b
Answer for Question No 49. is a
Answer for Question No 50. is a
Answer for Question No 51. is d
Answer for Question No 52. is a
Answer for Question No 53. is d
Answer for Question No 54. is c
Answer for Question No 55. is a
Answer for Question No 56. is c
Answer for Question No 57. is d
Answer for Question No 58. is b
Answer for Question No 59. is b
Answer for Question No 60. is a
Seat No -
Total number of questions : 60
1000499 T1 ENGINEERING PHYSICS
Time : 1hr
Max Marks : 50
N.B
1) All questions are Multiple Choice Questions having single correct option.
2) Attempt any 50 questions out of 60.
3) Use of calculator is allowed.
4) Each question carries 1 Mark.
5) Specially abled students are allowed 20 minutes extra for examination.
6) Do not use pencils to darken answer.
7) Use only black/blue ball point pen to darken the appropriate circle.
8) No change will be allowed once the answer is marked on OMR Sheet.
9) Rough work shall not be done on OMR sheet or on question paper.
10) Darken ONLY ONE CIRCLE for each answer.
Q.no 1. The expression for the thickness of a half-wave plate of positive crystal is
A : t = λ / (μe - μo )
B : t = λ / 2(μe - μo )
C : t = λ / 3(μe - μo )
D : t = λ /2 (μo – μe )
Q.no 2. Superconductivity was first observed by
A : Volta
B : Meissner
C : Kamerling Onnes
D : Schrieffer
Q.no 3. In an N-type semiconductor, donor level is
A : above the conduction band of the host
B : close to the conduction band of the host
C : close to the valence band of the host crystal.
D : below to the valence band of the host crystal
Q.no 4. If ne & nh are the number of electrons & holes in a semiconductor heavily doped with phosphorus, then
A : ne»nh
B : ne <nh
C : ne«nh
D : ne =nh
Q.no 5. piezoelectric effect has been observed in
A : nickel
B : glass
C : quartz
D : mica
Q.no 6. For the wavefunction to be true or acceptable, the following conditions are to be followed by it
A : Continuous
B : Finite
C : Normalizable
D : All of these
Q.no 7. The phenomena of the echo is used to measure the
A : length of metal
B : flaws in metal
C : transfer signals
D : none
Q.no 8. A hologram is most similar to a
A : Dispersion
B : prism
C : 3-D photograph
D : compound lens
Q.no 9. If the material is reduced to nano size then properties of those materials _____________ from those of the bulk material
A : slightly differ
B : drastically differ
C : remain same
D : can’t say
Q.no 10. When the temperature of n- type semiconductor is increased
A : net negative charge increases
B : minority carriers decreases
C : electron-hole pairs increases
D : none of the above
Q.no 11. Current once initiated in a superconducting ring can continue to flow infinitely without any power losses
Is called
Is called
A : Infinite current
B : Critical current
C : Persistent current
D : induced current
Q.no 12. The walls of the hall built for music concerns should
A : Amplify sound
B : Reflect sound
C : Transmit sound
D : D Absorb sound
Q.no 13. In Newton’s ring experiment if the air film is replaced by water film, then the diameter of the ring
A : Decreases
B : Increases
C : Remains same
D : None of the above
Q.no 14. ln Magnetostriction Oscillator
A : a copper rod is used
B : a nickel rod is used
C : a magnesium rod is used
D : an aluminium rod is used
Q.no 15. The speed of sound in medium depends upon
A : Amplitude
B : frequency
C : wavelength
D : properties of the medium
Q.no 16. In forward bias, the width of depletion region in a p-n junction diode
A : increases
B : decreases
C : remains constant
D : first (A) then (B)
Q.no 17. Which of the following cannot be polarized?
A : Radio waves
B : Sound waves
C : Light waves
D : X-rays
Q.no 18. We prefer Polaroid sunglasses because they
A : have soothing colours
B : reduce the intensity of light
C : are cheaper
D : can change colour
Q.no 19. For constructive interference the path difference should be
A : Zero or odd multiple of wavelength
B : Only integral multiple of wavelength
C : 0
D : Zero or integral multiple of wavelength
Q.no 20. What would be true for wavelengths of De Broglie waves
A : λ (electron) = λ (proton)
B : λ (electron) > λ (proton)
C : λ (electron) < λ (proton)
D : λ (electron) ~ λ (proton)
Q.no 21. Laevo-rotatory optically active substance rotates the plane of vibrations
A : In clockwise direction
B : In left hand side
C : By 1800
D : None of the above
Q.no 22. The active medium of a helium-neon laser is made up with ________ ratio of helium-neon.
A : 10:1
B : 10:3
C : 10:5
D : 10:6
Q.no 23. Effective path difference between two successive reflected rays by thin parallel film is
A : 2μtcosr+ λ/2
B : 0
C : 2μtcosr
D : 2μtcosr+n λ
Q.no 24. Sound waves of frequency less than 20 Hz are called
A : longitudinal wave
B : ultrasonic wave
C : Infrasonic waves
D : mechanical wave
Q.no 25. Plane polarized light has vibrations
A : In one direction perpendicular to direction of propagation
B : Along the direction of propagation
C : In two directions perpendicular to direction of propagation
D : In all directions perpendicular to direction of propagation
Q.no 26. The minimum amount of current passed through the body of superconducter in order of destroy the superconductivity is called.
A : induced current
B : Critical current
C : Eddy current
D : super current
Q.no 27. In a semiconductor, current conduction is due to
A : only holes
B : both holes and free electrons
C : only free electrons
D : none of the above
Q.no 28. Nanotechnology is the science of designing,creating and using the materials in which atleast one dimension has a size in the range of
A : 1nm-100nm
B : 0.01nm to 0.1 nm
C : 100 nm- 1000nm
D : 30- 50 nm
Q.no 29. On reverse biasing the P-N junction,its depletion region becomes
A : narrow
B : zero
C : broad
D : constant
Q.no 30. The superconducting State is perfectly _ _ _ _ _ in nature.
A : Diamagnetic
B : Paramagnetic
C : Ferromagnetic
D : All above
Q.no 31. The phenomenon in which the magnetic line of force are expelled out of the superconducting material at Critical temperature is called.
A : isotopic effect
B : Meissner effect
C : BCS * theory
D : London theory
Q.no 32. When a ray is reflected from denser medium, its phase changes by(in radian)
A : 0
B : π
C : 2π
D : 3π
Q.no 33. In the P-type semiconductor, the hole concentration in valence band is----------- than the electron concentration in conduction band.
A : less than
B : greater than
C : equal to
D : all of these
Q.no 34. De Broglie wave is expresssed in terms of Ψ. What is Ψ?
A : It is the energy of particles producing matter waves
B : It is the momentum of particles producing matter waves
C : It is the uncertainity in position of particles producing matter waves
D : It represents the oscillations of quantity that produces matter waves.
Q.no 35. Quantum mechanically, minimum energy of a particle enclosed in a potential well cannot be
A : 1 eV
B : zero
C : 100 eV
D : 1 KeV
Q.no 36. n type & p type silicon can be obtained by doping pure silicon with
A : Arsenic & Phosphorus
B : Indium & Aluminum
C : Phosphorus & Indium
D : Aluminum & Boron
Q.no 37. The forbidden energy gap in an insulator is of the order of
A : 1 eV
B : 2 eV
C : 0.1 eV
D : 5 eV
Q.no 38. ln superconductivity, the conductivity of a material becomes.
A : zero
B : finite
C : infinite
D : None of the above
Q.no 39. Which is the correct relation for forbidden energy gap in conductor, semi-conductor and insulator?
A : ΔEg conductor > ΔEg semiconductor> ΔEginsulator
B : ΔEgconductor > ΔEginsulator > Δ Eg semiconductor
C : ΔEginsulator > Δ Eg semiconductor > ΔEgconductor
D : ΔEg semiconductor > Δ Egconductor > ΔEginsulator
Q.no 40. Principal maxima for fraunhoffer single slit diffraction is obtained at ѳ
A : nλ
B : (n/2)π
C : 1
D : 0
Q.no 41. The normalization condition indicates that probabilities of finding the particle
A : in a small volume summed up over the entire space must give 1
B : in a small volume must give 1
C : in a small volume summed up along the positive direction must give 1
D : in a small volume summed up along the negative direction must give 1
Q.no 42. According to the Malu’s law, the intensity of polarized light emerging through the analyzer varies as
A : I =Iₒ cosθ
B : I =Iₒ/cos2θ
C : I =Iₒ / cos²θ
D : I =Iₒ cos²θ
Q.no 43. The points of constructive interference of light are
A : May be bright or dark
B : Always bright
C : Always dark
D : Neighter bight nor dark
Q.no 44. Formation of colour in a thin film of oil is due to
A : Interference of light waves
B : Diffraction of light waves
C : Scattering of light rays rays
D : Dispersion of light rays
Q.no 45. The impurity level in an extrinsic semiconductor is about of pure semiconductor
A : 10 atoms for 103 atoms
B : 10 atoms for 102 atoms
C : 1 atoms for 108 atoms
D : 1 atoms for 100 atom
Q.no 46. The current in a superconductor produces
A : zero, voltage drop across it
B : a strong, electric field around it
C : a small voltage drop across it
D : a large voltage drop across it
Q.no 47. LASER is a short form of
A : Light attenuation by stimulated emission of radiation
B : Light amplification by stimulated emission of radiation
C : Light absorption by stimulated emission of radiation
D : Light absorption by spontaneous emission of radiation
Q.no 48. Reverberation time T of a hall varies is inversely proportional as the
A : density
B : degree of sensation
C : effective area
D : square of amplitude
Q.no 49. In Newton’s ring experiment ,with air as a medium between Plano convex lens and glass plate, diameter of nth dark ring is
A : √4nrλ
B : √4nr
C : √(2n-1)2rλ
D : √4nr/λ
Q.no 50. Depletion layer consists of
A : electrons
B : mobile ions
C : protons.
D : immobile ions
Q.no 51. The battery connection required to forward bias a p-n junction are
A : +ve terminal to p and —ve terminal to n
B : -ve terminal to p and —ve terminal to n
C : -ve terminal to p and +ve terminal to n
D : none of the above
Q.no 52. At 0 K, intrinsic semiconductor behaves as
A : a perfect conductor
B : a super conductor
C : a semiconductor
D : a perfect insulator
Q.no 53. According to de Broglie hypothesis equation λ=h/p is applicable for
A : Matter particle only
B : Photons only
C : Both matter particle and photon
D : All options are correct
Q.no 54. Matter waves would be more significant for particles having mass
A : About 10 x 103 g
B : About 10 x 10-14 g
C : About 10 x 1014 g
D : About 10 x 10 -28 g
Q.no 55. What happens to O-ray and E-ray if they travel along the optic axis?
A : E-ray travels faster than O-ray
B : O-ray travels faster than E-ray
C : Both ray travels with same velocity
D : None of the above
Q.no 56. The reverberation time is the time required for the intensity to drop by
A : 30dB
B : 90dB
C : C 60dB
D : 120dB
Q.no 57. The name given to the unit of sound absorption is-
A : decibel
B : degree
C : sabine
D : watt
Q.no 58. An echo is heard when direct sound waves coming from the source and its reflected wave reach the listener with a time interval of about
A : 1/14 seconds
B : 1/3 seconds
C : 1/7 seconds
D : 1/19 seconds
Q.no 59. Velocity of sound wave is given by
A : v = f/λ
B : v = f.λ
C : v =λ/f
D : v = f/T
Q.no 60. Matter waves are associated with
A : Positively charged particles
B : Negatively charged particles
C : Neutral particles
D : All of these
Answer for Question No 1. is b
Answer for Question No 2. is a
Answer for Question No 3. is b
Answer for Question No 4. is a
Answer for Question No 5. is c
Answer for Question No 6. is d
Answer for Question No 7. is b
Answer for Question No 8. is c
Answer for Question No 9. is b
Answer for Question No 10. is c
Answer for Question No 11. is c
Answer for Question No 12. is d
Answer for Question No 13. is a
Answer for Question No 14. is b
Answer for Question No 15. is d
Answer for Question No 16. is b
Answer for Question No 17. is b
Answer for Question No 18. is b
Answer for Question No 19. is d
Answer for Question No 20. is b
Answer for Question No 21. is b
Answer for Question No 22. is a
Answer for Question No 23. is a
Answer for Question No 24. is c
Answer for Question No 25. is a
Answer for Question No 26. is b
Answer for Question No 27. is c
Answer for Question No 28. is a
Answer for Question No 29. is c
Answer for Question No 30. is a
Answer for Question No 31. is b
Answer for Question No 32. is b
Answer for Question No 33. is b
Answer for Question No 34. is d
Answer for Question No 35. is b
Answer for Question No 36. is c
Answer for Question No 37. is d
Answer for Question No 38. is c
Answer for Question No 39. is c
Answer for Question No 40. is d
Answer for Question No 41. is a
Answer for Question No 42. is d
Answer for Question No 43. is b
Answer for Question No 44. is a
Answer for Question No 45. is c
Answer for Question No 46. is a
Answer for Question No 47. is b
Answer for Question No 48. is c
Answer for Question No 49. is a
Answer for Question No 50. is d
Answer for Question No 51. is a
Answer for Question No 52. is d
Answer for Question No 53. is c
Answer for Question No 54. is d
Answer for Question No 55. is c
Answer for Question No 56. is c
Answer for Question No 57. is c
Answer for Question No 58. is c
Answer for Question No 59. is b
Answer for Question No 60. is d
Seat No -
Total number of questions : 60
1000499 T1 ENGINEERING PHYSICS
Time : 1hr
Max Marks : 50
N.B
1) All questions are Multiple Choice Questions having single correct option.
2) Attempt any 50 questions out of 60.
3) Use of calculator is allowed.
4) Each question carries 1 Mark.
5) Specially abled students are allowed 20 minutes extra for examination.
6) Do not use pencils to darken answer.
7) Use only black/blue ball point pen to darken the appropriate circle.
8) No change will be allowed once the answer is marked on OMR Sheet.
9) Rough work shall not be done on OMR sheet or on question paper.
10) Darken ONLY ONE CIRCLE for each answer.
Q.no 1. The characteristics of laser beam are
A : Highly directional
B : Highly intense
C : Highly monochromatic
D : All of these
Q.no 2. Which of the following when added as an impurity into the silicon produces N-type semiconductor?
A : P
B : B
C : Al
D : Mg
Q.no 3. _ _ _ _ _ superconductor is completely diamagnetic
A : Type - l
B : Type - ll
C : both
D : none of the above
Q.no 4. A hologram is most similar to a
A : Dispersion
B : prism
C : 3-D photograph
D : compound lens
Q.no 5. For the Solar cell the ratio of maximum power delivered to ideal power is called as
A : Efficiency
B : Fill factor
C : short-circuit
D : Open-circuit
Q.no 6. Ψ is called the wave function of the particle. If |Ψ|2 is 0.1, the probability of finding the particle at a given location at a given time is
A : 0.1
B : (0.1)2
C : (0.1)1/2
D : None of these
Q.no 7. When a ray is reflected from denser medium, its phase changes by(in radian)
A : 0
B : π
C : 2π
D : 3π
Q.no 8. Sound travel in the form of
A : longitudinal
B : transverse
C : mechanical
D : Infrasonic waves
Q.no 9. In the P-type semiconductor, the hole concentration in valence band is----------- than the electron concentration in conduction band.
A : less than
B : greater than
C : equal to
D : all of these
Q.no 10. The temperature at which conductivity of material becomes infinite is called.
A : Critical temperature
B : absolute temperature
C : Mean temperature
D : Crystallization temperature
Q.no 11. The main principle of optical fiber is
A : total internal dispersion
B : total internal reflection
C : total internal refraction
D : none of the above
Q.no 12. The quarter wave plate produces
A : Path difference of λ/4 or phase difference of π /2 radians between O- and E-waves
B : Path difference of λ /2 or phase difference of π /2 radians
C : Path difference of λ /4 or phase difference of π radians
D : None of the above
Q.no 13. For an infinitely deep 1 dimentional potential well, a quantum particle in the ground state is likely to be found
A : at one corner of the well
B : At 1/4th and 3/4th distance from one end of the well
C : At every point in the well with equal probability
D : At the center of the well
Q.no 14. To check the optical flatness of the surface in wedge-shape thin film fringe-width must be
A : Equal, straight
B : Unequal, straight
C : Unequal, curved
D : Equal, curved
Q.no 15. A path difference of 3λ/2 between the two waves corresponds to the phase difference
A : 3π/2
B : π/3
C : 3π
D : 2π/3
Q.no 16. The superconducting State is perfectly _ _ _ _ _ in nature.
A : Diamagnetic
B : Paramagnetic
C : Ferromagnetic
D : All above
Q.no 17. Pumping process used in diode laser is
A : optical pumping
B : forward biased voltage
C : electrical discharge
D : none of these
Q.no 18. Laevo-rotatory optically active substance rotates the plane of vibrations
A : In clockwise direction
B : In left hand side
C : By 1800
D : None of the above
Q.no 19. In a semiconductor, current conduction is due to
A : only holes
B : both holes and free electrons
C : only free electrons
D : none of the above
Q.no 20. If the gap between plano- convex lens and plane glass plate filled with the liquid instead of air then
A : Diameter of rings increases
B : Diameter of rings decreases
C : Diameter of rings does not change
D : All above are correct
Q.no 21. The minimum amount of current passed through the body of superconducter in order of destroy the superconductivity is called.
A : induced current
B : Critical current
C : Eddy current
D : super current
Q.no 22. The points of constructive interference of light are
A : May be bright or dark
B : Always bright
C : Always dark
D : Neighter bight nor dark
Q.no 23. n type & p type silicon can be obtained by doping pure silicon with
A : Arsenic & Phosphorus
B : Indium & Aluminum
C : Phosphorus & Indium
D : Aluminum & Boron
Q.no 24. When two semiconductors of p-type & n-type are brought in contact with each other, the P-N junction formed behaves like
A : an oscillator
B : an amplifier
C : a diode
D : a conductor
Q.no 25. If the material is reduced to nano size then properties of those materials _____________ from those of the bulk material
A : slightly differ
B : drastically differ
C : remain same
D : can’t say
Q.no 26. On reverse biasing the P-N junction,its depletion region becomes
A : narrow
B : zero
C : broad
D : constant
Q.no 27. The forbidden energy gap in an insulator is of the order of
A : 1 eV
B : 2 eV
C : 0.1 eV
D : 5 eV
Q.no 28. Reverse bias applied on a junction diode-----------
A : raises the potential barrier
B : decrease the minority carrier current
C : increases the majority carrier current
D : lowers the potential barrier
Q.no 29. The active medium of a helium-neon laser is made up with ________ ratio of helium-neon.
A : 10:1
B : 10:3
C : 10:5
D : 10:6
Q.no 30. When the temperature of n- type semiconductor is increased
A : net negative charge increases
B : minority carriers decreases
C : electron-hole pairs increases
D : none of the above
Q.no 31. The battery connection required to forward bias a p-n junction are
A : +ve terminal to p and —ve terminal to n
B : -ve terminal to p and —ve terminal to n
C : -ve terminal to p and +ve terminal to n
D : none of the above
Q.no 32. Data storage capacities of hard disks and have led to small and faster microprocessors due to the use of ______________
A : Nanosized electronic components
B : Pure semiconductors
C : Capacitive components
D : Inductive components
Q.no 33. piezoelectric effect has been observed in
A : nickel
B : glass
C : quartz
D : mica
Q.no 34. ln Magnetostriction Oscillator
A : a copper rod is used
B : a nickel rod is used
C : a magnesium rod is used
D : an aluminium rod is used
Q.no 35. In Newton’s ring experiment if the air film is replaced by water film, then the diameter of the ring
A : Decreases
B : Increases
C : Remains same
D : None of the above
Q.no 36. Which of the following will remain unchanged when a sound wave travels in air or in water?
A : Amplitude
B : frequency
C : wavelength
D : Speed
Q.no 37. The walls of the hall built for music concerns should
A : Amplify sound
B : Reflect sound
C : Transmit sound
D : D Absorb sound
Q.no 38. Reverberation time T of a hall varies is inversely proportional as the
A : density
B : degree of sensation
C : effective area
D : square of amplitude
Q.no 39. De Broglie wave is expresssed in terms of Ψ. What is Ψ?
A : It is the energy of particles producing matter waves
B : It is the momentum of particles producing matter waves
C : It is the uncertainity in position of particles producing matter waves
D : It represents the oscillations of quantity that produces matter waves.
Q.no 40. In the Fresnel diffraction the incident wave front is
A : Spherical
B : Cylindrical
C : Spherical or cylindrical
D : Plane
Q.no 41. Depletion layer consists of
A : electrons
B : mobile ions
C : protons.
D : immobile ions
Q.no 42. Depth sounding technique is based on principle of
A : Cavitations
B : navigation
C : reflection
D : echo sounding
Q.no 43. Principal maxima for fraunhoffer single slit diffraction is obtained at ѳ
A : nλ
B : (n/2)π
C : 1
D : 0
Q.no 44. We prefer Polaroid sunglasses because they
A : have soothing colours
B : reduce the intensity of light
C : are cheaper
D : can change colour
Q.no 45. The current in a superconductor produces
A : zero, voltage drop across it
B : a strong, electric field around it
C : a small voltage drop across it
D : a large voltage drop across it
Q.no 46. For the wavefunction to be true or acceptable, the following conditions are to be followed by it
A : Continuous
B : Finite
C : Normalizable
D : All of these
Q.no 47. According to de Broglie hypothesis
A : A particle in rest has matter waves associated with it
B : A particle at rest or in motion has matter wave associated with it
C : A particle in motion has matter wave associated with it
D : All above statements are correct
Q.no 48. The light source used for optical pumping in Ruby laser is
A : Xenon
B : Argon
C : Neon
D : none of the above
Q.no 49. What would be true for wavelengths of De Broglie waves
A : λ (electron) = λ (proton)
B : λ (electron) > λ (proton)
C : λ (electron) < λ (proton)
D : λ (electron) ~ λ (proton)
Q.no 50. Matter waves would be more significant for particles having mass
A : About 10 x 103 g
B : About 10 x 10-14 g
C : About 10 x 1014 g
D : About 10 x 10 -28 g
Q.no 51. According to the Malu’s law, the intensity of polarized light emerging through the analyzer varies as
A : I =Iₒ cosθ
B : I =Iₒ/cos2θ
C : I =Iₒ / cos²θ
D : I =Iₒ cos²θ
Q.no 52. In an N-type semiconductor, donor level is
A : above the conduction band of the host
B : close to the conduction band of the host
C : close to the valence band of the host crystal.
D : below to the valence band of the host crystal
Q.no 53. Photovoltaic cells convert light energy into
A : solar energy
B : electrical energy
C : mechanical energy
D : kinetic energy
Q.no 54. The Cooper pairs are electron pairs with
A : equal and same momentum
B : Unequal & same spin
C : Equal and opposite momentum and spin
D : Unequal & opposite spin and momentum
Q.no 55. Which of the following cannot be polarized?
A : Radio waves
B : Sound waves
C : Light waves
D : X-rays
Q.no 56. Heisenberg Uncertainty Principle is not significant for daily life objects because
A : The value of Planck's constant is insignificant for these particles
B : It is difficult to observe wave particle duality in daily life objects
C : Daily life objects are macroscopic
D : All of these
Q.no 57. Ultrasonic are sound waves having frequency greater than
A : 20 MHz
B : 20 kHz
C : 20GHz
D : 20 Hz
Q.no 58. The name given to the unit of sound absorption is-
A : decibel
B : degree
C : sabine
D : watt
Q.no 59. Intensity at any point on the screen at angle Ѳ for Fraunhoffer single slit is given by I
A : (n/2)π
B : Im(sinα/α)2
C : sin-1(nλ/a)
D : (sinα/α)2
Q.no 60. The effective path or phase difference between the reflected rays for antirefiection films
A : λ/4 or π/2
B : λ or π/2
C : λ/2 or π
D : 2λor π/2
Answer for Question No 1. is d
Answer for Question No 2. is a
Answer for Question No 3. is a
Answer for Question No 4. is c
Answer for Question No 5. is b
Answer for Question No 6. is a
Answer for Question No 7. is b
Answer for Question No 8. is a
Answer for Question No 9. is b
Answer for Question No 10. is a
Answer for Question No 11. is b
Answer for Question No 12. is a
Answer for Question No 13. is d
Answer for Question No 14. is a
Answer for Question No 15. is c
Answer for Question No 16. is a
Answer for Question No 17. is b
Answer for Question No 18. is b
Answer for Question No 19. is c
Answer for Question No 20. is b
Answer for Question No 21. is b
Answer for Question No 22. is b
Answer for Question No 23. is c
Answer for Question No 24. is c
Answer for Question No 25. is b
Answer for Question No 26. is c
Answer for Question No 27. is d
Answer for Question No 28. is a
Answer for Question No 29. is a
Answer for Question No 30. is c
Answer for Question No 31. is a
Answer for Question No 32. is a
Answer for Question No 33. is c
Answer for Question No 34. is b
Answer for Question No 35. is a
Answer for Question No 36. is b
Answer for Question No 37. is d
Answer for Question No 38. is c
Answer for Question No 39. is d
Answer for Question No 40. is a
Answer for Question No 41. is d
Answer for Question No 42. is d
Answer for Question No 43. is d
Answer for Question No 44. is b
Answer for Question No 45. is a
Answer for Question No 46. is d
Answer for Question No 47. is c
Answer for Question No 48. is a
Answer for Question No 49. is b
Answer for Question No 50. is d
Answer for Question No 51. is d
Answer for Question No 52. is b
Answer for Question No 53. is b
Answer for Question No 54. is c
Answer for Question No 55. is b
Answer for Question No 56. is d
Answer for Question No 57. is b
Answer for Question No 58. is c
Answer for Question No 59. is b
Answer for Question No 60. is c
Seat No -
Total number of questions : 60
1000499 T1 ENGINEERING PHYSICS
Time : 1hr
Max Marks : 50
N.B
1) All questions are Multiple Choice Questions having single correct option.
2) Attempt any 50 questions out of 60.
3) Use of calculator is allowed.
4) Each question carries 1 Mark.
5) Specially abled students are allowed 20 minutes extra for examination.
6) Do not use pencils to darken answer.
7) Use only black/blue ball point pen to darken the appropriate circle.
8) No change will be allowed once the answer is marked on OMR Sheet.
9) Rough work shall not be done on OMR sheet or on question paper.
10) Darken ONLY ONE CIRCLE for each answer.
Q.no 1. The speed of sound in medium depends upon
A : Amplitude
B : frequency
C : wavelength
D : properties of the medium
Q.no 2. In the Fresnel diffraction the incident wave front is
A : Spherical
B : Cylindrical
C : Spherical or cylindrical
D : Plane
Q.no 3. According to de Broglie hypothesis
A : A particle in rest has matter waves associated with it
B : A particle at rest or in motion has matter wave associated with it
C : A particle in motion has matter wave associated with it
D : All above statements are correct
Q.no 4. Formation of colour in a thin film of oil is due to
A : Interference of light waves
B : Diffraction of light waves
C : Scattering of light rays rays
D : Dispersion of light rays
Q.no 5. Sound waves of frequency less than 20 Hz are called
A : longitudinal wave
B : ultrasonic wave
C : Infrasonic waves
D : mechanical wave
Q.no 6. Current once initiated in a superconducting ring can continue to flow infinitely without any power losses
Is called
Is called
A : Infinite current
B : Critical current
C : Persistent current
D : induced current
Q.no 7. Intensity of diffraction at an angle ѳ for fraunhoffer diffraction by grating is given by Iѳ
A : (sinNβ/ sinβ)
B : (sinβ)2
C : (sinα/α)2
D : Im(sinα/α)2 (sinNβ/ sinβ)2
Q.no 8. When the size of the material is reduced to size in nano region, the energy band structure undergo______________which mainly accounts for the change in the properties of nanoparticles
A : Small variations
B : large variations
C : Splitting
D : scattering
Q.no 9. Fringe width is defined as the distance between two consecutive
A : Crests
B : Bright fringes only
C : Dark fringes only
D : Bright or dark fringes
Q.no 10. The normalization condition indicates that probabilities of finding the particle
A : in a small volume summed up over the entire space must give 1
B : in a small volume must give 1
C : in a small volume summed up along the positive direction must give 1
D : in a small volume summed up along the negative direction must give 1
Q.no 11. In case of ruby laser, optical resonator cavity is formed by the silvered ends of
A : Ruby crystal
B : The Calcium crystal
C : Tourmaline crystal
D : Quartz crystal
Q.no 12. The Fermi level in intrinsic semiconductor lies exactly at the of the forbidden band
A : above
B : center
C : below
D : none of these
Q.no 13. At 0 K, intrinsic semiconductor behaves as
A : a perfect conductor
B : a super conductor
C : a semiconductor
D : a perfect insulator
Q.no 14. When two semiconductors of p-type & n-type are brought in contact with each other, the P-N junction formed behaves like
A : an oscillator
B : an amplifier
C : a diode
D : a conductor
Q.no 15. Photovoltaic cells convert light energy into
A : solar energy
B : electrical energy
C : mechanical energy
D : kinetic energy
Q.no 16. The impurity level in an extrinsic semiconductor is about of pure semiconductor
A : 10 atoms for 103 atoms
B : 10 atoms for 102 atoms
C : 1 atoms for 108 atoms
D : 1 atoms for 100 atom
Q.no 17. The quarter wave plate produces
A : Path difference of λ/4 or phase difference of π /2 radians between O- and E-waves
B : Path difference of λ /2 or phase difference of π /2 radians
C : Path difference of λ /4 or phase difference of π radians
D : None of the above
Q.no 18. When the size of the material reduces, the surface area to volume ratio ________
A : decreases
B : Increases
C : remains same
D : becomes exactly equal to the volume
Q.no 19. n type & p type silicon can be obtained by doping pure silicon with
A : Arsenic & Phosphorus
B : Indium & Aluminum
C : Phosphorus & Indium
D : Aluminum & Boron
Q.no 20. For an infinitely deep 1 dimentional potential well, a quantum particle in the ground state is likely to be found
A : at one corner of the well
B : At 1/4th and 3/4th distance from one end of the well
C : At every point in the well with equal probability
D : At the center of the well
Q.no 21. In Fraunhoffer diffraction distance of slit from source and screen is
A : finite
B : infinite
C : parallel
D : not equal
Q.no 22. Which of the following will remain unchanged when a sound wave travels in air or in water?
A : Amplitude
B : frequency
C : wavelength
D : Speed
Q.no 23. We prefer Polaroid sunglasses because they
A : have soothing colours
B : reduce the intensity of light
C : are cheaper
D : can change colour
Q.no 24. Nanotechnology is the science of designing,creating and using the materials in which atleast one dimension has a size in the range of
A : 1nm-100nm
B : 0.01nm to 0.1 nm
C : 100 nm- 1000nm
D : 30- 50 nm
Q.no 25. For constructive interference the path difference should be
A : Zero or odd multiple of wavelength
B : Only integral multiple of wavelength
C : 0
D : Zero or integral multiple of wavelength
Q.no 26. ln superconductivity, the conductivity of a material becomes.
A : zero
B : finite
C : infinite
D : None of the above
Q.no 27. Quantum mechanically, minimum energy of a particle enclosed in a potential well cannot be
A : 1 eV
B : zero
C : 100 eV
D : 1 KeV
Q.no 28. In Newton’s ring experiment ,with air as a medium between Plano convex lens and glass plate, diameter of nth dark ring is
A : √4nrλ
B : √4nr
C : √(2n-1)2rλ
D : √4nr/λ
Q.no 29. Principal maxima for fraunhoffer single slit diffraction is obtained at ѳ
A : nλ
B : (n/2)π
C : 1
D : 0
Q.no 30. When a ray is reflected from denser medium, its phase changes by(in radian)
A : 0
B : π
C : 2π
D : 3π
Q.no 31. The characteristics of laser beam are
A : Highly directional
B : Highly intense
C : Highly monochromatic
D : All of these
Q.no 32. The temperature at which conductivity of material becomes infinite is called.
A : Critical temperature
B : absolute temperature
C : Mean temperature
D : Crystallization temperature
Q.no 33. Wave function Ψ represents
A : Potential energy of particles producing matter waves
B : Oscillations of quantity that produces matter waves
C : Momentum of particles that produces matter waves
D : Kinetic energy of particles producing matter waves
Q.no 34. At the critical temperature and less than critical temperature the resistance of a superconductor.
A : increase rapidly
B : decrease rapidly
C : remains zero
D : increase slowly
Q.no 35. The phenomenon in which the magnetic line of force are expelled out of the superconducting material at Critical temperature is called.
A : isotopic effect
B : Meissner effect
C : BCS * theory
D : London theory
Q.no 36. If the material is reduced to nano size then properties of those materials _____________ from those of the bulk material
A : slightly differ
B : drastically differ
C : remain same
D : can’t say
Q.no 37. Effective path difference between two successive reflected rays by thin parallel film is
A : 2μtcosr+ λ/2
B : 0
C : 2μtcosr
D : 2μtcosr+n λ
Q.no 38. Pumping process used in diode laser is
A : optical pumping
B : forward biased voltage
C : electrical discharge
D : none of these
Q.no 39. The active medium of a helium-neon laser is made up with ________ ratio of helium-neon.
A : 10:1
B : 10:3
C : 10:5
D : 10:6
Q.no 40. The expression for the thickness of a half-wave plate of positive crystal is
A : t = λ / (μe - μo )
B : t = λ / 2(μe - μo )
C : t = λ / 3(μe - μo )
D : t = λ /2 (μo – μe )
Q.no 41. Which of the following when added as an impurity into the silicon produces N-type semiconductor?
A : P
B : B
C : Al
D : Mg
Q.no 42. Which is the correct relation for forbidden energy gap in conductor, semi-conductor and insulator?
A : ΔEg conductor > ΔEg semiconductor> ΔEginsulator
B : ΔEgconductor > ΔEginsulator > Δ Eg semiconductor
C : ΔEginsulator > Δ Eg semiconductor > ΔEgconductor
D : ΔEg semiconductor > Δ Egconductor > ΔEginsulator
Q.no 43. In the P-type semiconductor, the hole concentration in valence band is----------- than the electron concentration in conduction band.
A : less than
B : greater than
C : equal to
D : all of these
Q.no 44. Laevo-rotatory optically active substance rotates the plane of vibrations
A : In clockwise direction
B : In left hand side
C : By 1800
D : None of the above
Q.no 45. Loudness of sound is found to be proportional to the
A : log 10 L
B : log 10 I
C : area
D : log 10 s
Q.no 46. The minimum amount of current passed through the body of superconducter in order of destroy the superconductivity is called.
A : induced current
B : Critical current
C : Eddy current
D : super current
Q.no 47. The battery connection required to forward bias a p-n junction are
A : +ve terminal to p and —ve terminal to n
B : -ve terminal to p and —ve terminal to n
C : -ve terminal to p and +ve terminal to n
D : none of the above
Q.no 48. In a narrow wave packet of matter wave
A : The position of the particle cannot be determined accurately
B : The momentum of the particle cannot be determined accurately
C : Concept of wave group does not exist
D : Phase velocity is always zero
Q.no 49. What happens to O-ray and E-ray if they travel along the optic axis?
A : E-ray travels faster than O-ray
B : O-ray travels faster than E-ray
C : Both ray travels with same velocity
D : None of the above
Q.no 50. _________ superconductors are also called soft superconductors
A : Type I
B : Type II
C : Type III
D : Type IV
Q.no 51. Data storage capacities of hard disks and have led to small and faster microprocessors due to the use of ______________
A : Nanosized electronic components
B : Pure semiconductors
C : Capacitive components
D : Inductive components
Q.no 52. Which of the following cannot be polarized?
A : Radio waves
B : Sound waves
C : Light waves
D : X-rays
Q.no 53. Sound intensity is
A : energy/time
B : wb/m3
C : watt/m2
D : energy/time. area
Q.no 54. Ψ is called the wave function of the particle. If |Ψ|2 is 0.1, the probability of finding the particle at a given location at a given time is
A : 0.1
B : (0.1)2
C : (0.1)1/2
D : None of these
Q.no 55. The current in a superconductor produces
A : zero, voltage drop across it
B : a strong, electric field around it
C : a small voltage drop across it
D : a large voltage drop across it
Q.no 56. The reverberation time is the time required for the intensity to drop by
A : 30dB
B : 90dB
C : C 60dB
D : 120dB
Q.no 57. Velocity of sound wave is given by
A : v = f/λ
B : v = f.λ
C : v =λ/f
D : v = f/T
Q.no 58. Intensity at any point on the screen at angle Ѳ for Fraunhoffer single slit is given by I
A : (n/2)π
B : Im(sinα/α)2
C : sin-1(nλ/a)
D : (sinα/α)2
Q.no 59. The effective path or phase difference between the reflected rays for antirefiection films
A : λ/4 or π/2
B : λ or π/2
C : λ/2 or π
D : 2λor π/2
Q.no 60. The name given to the unit of sound absorption is-
A : decibel
B : degree
C : sabine
D : watt
Answer for Question No 1. is d
Answer for Question No 2. is a
Answer for Question No 3. is c
Answer for Question No 4. is a
Answer for Question No 5. is c
Answer for Question No 6. is c
Answer for Question No 7. is d
Answer for Question No 8. is b
Answer for Question No 9. is d
Answer for Question No 10. is a
Answer for Question No 11. is a
Answer for Question No 12. is b
Answer for Question No 13. is d
Answer for Question No 14. is c
Answer for Question No 15. is b
Answer for Question No 16. is c
Answer for Question No 17. is a
Answer for Question No 18. is b
Answer for Question No 19. is c
Answer for Question No 20. is d
Answer for Question No 21. is b
Answer for Question No 22. is b
Answer for Question No 23. is b
Answer for Question No 24. is a
Answer for Question No 25. is d
Answer for Question No 26. is c
Answer for Question No 27. is b
Answer for Question No 28. is a
Answer for Question No 29. is d
Answer for Question No 30. is b
Answer for Question No 31. is d
Answer for Question No 32. is a
Answer for Question No 33. is b
Answer for Question No 34. is c
Answer for Question No 35. is b
Answer for Question No 36. is b
Answer for Question No 37. is a
Answer for Question No 38. is b
Answer for Question No 39. is a
Answer for Question No 40. is b
Answer for Question No 41. is a
Answer for Question No 42. is c
Answer for Question No 43. is b
Answer for Question No 44. is b
Answer for Question No 45. is b
Answer for Question No 46. is b
Answer for Question No 47. is a
Answer for Question No 48. is b
Answer for Question No 49. is c
Answer for Question No 50. is a
Answer for Question No 51. is a
Answer for Question No 52. is b
Answer for Question No 53. is d
Answer for Question No 54. is a
Answer for Question No 55. is a
Answer for Question No 56. is c
Answer for Question No 57. is b
Answer for Question No 58. is b
Answer for Question No 59. is c
Answer for Question No 60. is c
Seat No -
Total number of questions : 60
1000499 T1 ENGINEERING PHYSICS
Time : 1hr
Max Marks : 50
N.B
1) All questions are Multiple Choice Questions having single correct option.
2) Attempt any 50 questions out of 60.
3) Use of calculator is allowed.
4) Each question carries 1 Mark.
5) Specially abled students are allowed 20 minutes extra for examination.
6) Do not use pencils to darken answer.
7) Use only black/blue ball point pen to darken the appropriate circle.
8) No change will be allowed once the answer is marked on OMR Sheet.
9) Rough work shall not be done on OMR sheet or on question paper.
10) Darken ONLY ONE CIRCLE for each answer.
Q.no 1. When a ray is reflected from denser medium, its phase changes by(in radian)
A : 0
B : π
C : 2π
D : 3π
Q.no 2. When the size of the material reduces, the surface area to volume ratio ________
A : decreases
B : Increases
C : remains same
D : becomes exactly equal to the volume
Q.no 3. What would be true for wavelengths of De Broglie waves
A : λ (electron) = λ (proton)
B : λ (electron) > λ (proton)
C : λ (electron) < λ (proton)
D : λ (electron) ~ λ (proton)
Q.no 4. The quarter wave plate produces
A : Path difference of λ/4 or phase difference of π /2 radians between O- and E-waves
B : Path difference of λ /2 or phase difference of π /2 radians
C : Path difference of λ /4 or phase difference of π radians
D : None of the above
Q.no 5. Matter waves would be more significant for particles having mass
A : About 10 x 103 g
B : About 10 x 10-14 g
C : About 10 x 1014 g
D : About 10 x 10 -28 g
Q.no 6. The battery connection required to forward bias a p-n junction are
A : +ve terminal to p and —ve terminal to n
B : -ve terminal to p and —ve terminal to n
C : -ve terminal to p and +ve terminal to n
D : none of the above
Q.no 7. According to de Broglie hypothesis equation λ=h/p is applicable for
A : Matter particle only
B : Photons only
C : Both matter particle and photon
D : All options are correct
Q.no 8. The main principle of optical fiber is
A : total internal dispersion
B : total internal reflection
C : total internal refraction
D : none of the above
Q.no 9. At 0 K, intrinsic semiconductor behaves as
A : a perfect conductor
B : a super conductor
C : a semiconductor
D : a perfect insulator
Q.no 10. In case of ruby laser, optical resonator cavity is formed by the silvered ends of
A : Ruby crystal
B : The Calcium crystal
C : Tourmaline crystal
D : Quartz crystal
Q.no 11. ln superconductivity, the conductivity of a material becomes.
A : zero
B : finite
C : infinite
D : None of the above
Q.no 12. For an infinitely deep 1 dimentional potential well, a quantum particle in the ground state is likely to be found
A : at one corner of the well
B : At 1/4th and 3/4th distance from one end of the well
C : At every point in the well with equal probability
D : At the center of the well
Q.no 13. Sound waves of frequency less than 20 Hz are called
A : longitudinal wave
B : ultrasonic wave
C : Infrasonic waves
D : mechanical wave
Q.no 14. Which is the correct relation for forbidden energy gap in conductor, semi-conductor and insulator?
A : ΔEg conductor > ΔEg semiconductor> ΔEginsulator
B : ΔEgconductor > ΔEginsulator > Δ Eg semiconductor
C : ΔEginsulator > Δ Eg semiconductor > ΔEgconductor
D : ΔEg semiconductor > Δ Egconductor > ΔEginsulator
Q.no 15. Reverse bias applied on a junction diode-----------
A : raises the potential barrier
B : decrease the minority carrier current
C : increases the majority carrier current
D : lowers the potential barrier
Q.no 16. Principal maxima for fraunhoffer single slit diffraction is obtained at ѳ
A : nλ
B : (n/2)π
C : 1
D : 0
Q.no 17. Plane polarized light can be produced by
A : Simple reflection
B : Pile of plates
C : Nicol’s prism
D : All of these
Q.no 18. n type & p type silicon can be obtained by doping pure silicon with
A : Arsenic & Phosphorus
B : Indium & Aluminum
C : Phosphorus & Indium
D : Aluminum & Boron
Q.no 19. The forbidden energy gap in an insulator is of the order of
A : 1 eV
B : 2 eV
C : 0.1 eV
D : 5 eV
Q.no 20. The active medium of a helium-neon laser is made up with ________ ratio of helium-neon.
A : 10:1
B : 10:3
C : 10:5
D : 10:6
Q.no 21. Depletion layer consists of
A : electrons
B : mobile ions
C : protons.
D : immobile ions
Q.no 22. At the critical temperature and less than critical temperature the resistance of a superconductor.
A : increase rapidly
B : decrease rapidly
C : remains zero
D : increase slowly
Q.no 23. Laser action is possible only if there is
A : a set of reflecting mirrors
B : a black body
C : population inversion
D : oscillations of laser source
Q.no 24. When the size of the material is reduced to size in nano region, the energy band structure undergo______________which mainly accounts for the change in the properties of nanoparticles
A : Small variations
B : large variations
C : Splitting
D : scattering
Q.no 25. Data storage capacities of hard disks and have led to small and faster microprocessors due to the use of ______________
A : Nanosized electronic components
B : Pure semiconductors
C : Capacitive components
D : Inductive components
Q.no 26. In an N-type semiconductor, donor level is
A : above the conduction band of the host
B : close to the conduction band of the host
C : close to the valence band of the host crystal.
D : below to the valence band of the host crystal
Q.no 27. The minimum amount of current passed through the body of superconducter in order of destroy the superconductivity is called.
A : induced current
B : Critical current
C : Eddy current
D : super current
Q.no 28. Laevo-rotatory optically active substance rotates the plane of vibrations
A : In clockwise direction
B : In left hand side
C : By 1800
D : None of the above
Q.no 29. Types - l superconductors are ___________ temperature superconductor.
A : low
B : absolute
C : High
D : None of the Above
Q.no 30. The light source used for optical pumping in Ruby laser is
A : Xenon
B : Argon
C : Neon
D : none of the above
Q.no 31. The phenomenon in which the magnetic line of force are expelled out of the superconducting material at Critical temperature is called.
A : isotopic effect
B : Meissner effect
C : BCS * theory
D : London theory
Q.no 32. In a narrow wave packet of matter wave
A : The position of the particle cannot be determined accurately
B : The momentum of the particle cannot be determined accurately
C : Concept of wave group does not exist
D : Phase velocity is always zero
Q.no 33. For the Solar cell the ratio of maximum power delivered to ideal power is called as
A : Efficiency
B : Fill factor
C : short-circuit
D : Open-circuit
Q.no 34. In Newton’s ring experiment if the air film is replaced by water film, then the diameter of the ring
A : Decreases
B : Increases
C : Remains same
D : None of the above
Q.no 35. Which of the following when added as an impurity into the silicon produces N-type semiconductor?
A : P
B : B
C : Al
D : Mg
Q.no 36. Ultrasonic waves are produced by
A : piezoelectric effect
B : Doppler effect
C : Peltier effect
D : magneto-optic effect
Q.no 37. The intensity of central bright band in the case of diffraction is
A : maximum
B : minimum
C : varies between max to min
D : none of above
Q.no 38. In Newton's rings the central spot is
A : Always bright
B : Always dark
C : Can be bright or dark
D : Of blue colour
Q.no 39. Superconductivity was first observed by
A : Volta
B : Meissner
C : Kamerling Onnes
D : Schrieffer
Q.no 40. When the light is incident at the polarizing angle, which of the following is completely polarized?
A : reflected light
B : refracted light
C : both reflected as well as refracted light
D : neither reflected nor refracted light
Q.no 41. _________ superconductors are also called soft superconductors
A : Type I
B : Type II
C : Type III
D : Type IV
Q.no 42. _ _ _ _ _ superconductor is completely diamagnetic
A : Type - l
B : Type - ll
C : both
D : none of the above
Q.no 43. The walls of the hall built for music concerns should
A : Amplify sound
B : Reflect sound
C : Transmit sound
D : D Absorb sound
Q.no 44. The Fermi level in intrinsic semiconductor lies exactly at the of the forbidden band
A : above
B : center
C : below
D : none of these
Q.no 45. __________ are used in sunscreen lotions to protect the skin from ultraviolet radiations
A : Zinc oxide and Titanium oxide nanoparticles
B : Talcum stone particles
C : Non-metal nanoparticles
D : Quantum dots
Q.no 46. The current in a superconductor produces
A : zero, voltage drop across it
B : a strong, electric field around it
C : a small voltage drop across it
D : a large voltage drop across it
Q.no 47. De Broglie wave is expresssed in terms of Ψ. What is Ψ?
A : It is the energy of particles producing matter waves
B : It is the momentum of particles producing matter waves
C : It is the uncertainity in position of particles producing matter waves
D : It represents the oscillations of quantity that produces matter waves.
Q.no 48. A hologram is most similar to a
A : Dispersion
B : prism
C : 3-D photograph
D : compound lens
Q.no 49. Photovoltaic cells convert light energy into
A : solar energy
B : electrical energy
C : mechanical energy
D : kinetic energy
Q.no 50. The superconducting State is perfectly _ _ _ _ _ in nature.
A : Diamagnetic
B : Paramagnetic
C : Ferromagnetic
D : All above
Q.no 51. If the material is reduced to nano size then properties of those materials _____________ from those of the bulk material
A : slightly differ
B : drastically differ
C : remain same
D : can’t say
Q.no 52. For the wavefunction to be true or acceptable, the following conditions are to be followed by it
A : Continuous
B : Finite
C : Normalizable
D : All of these
Q.no 53. For constructive interference the path difference should be
A : Zero or odd multiple of wavelength
B : Only integral multiple of wavelength
C : 0
D : Zero or integral multiple of wavelength
Q.no 54. Heisenberg Uncertainty Principle is significant for subatomic particles because
A : Their energy is small
B : They show wave particle duality
C : Their velocity is small
D : They show photoelectric effect
Q.no 55. The impurity level in an extrinsic semiconductor is about of pure semiconductor
A : 10 atoms for 103 atoms
B : 10 atoms for 102 atoms
C : 1 atoms for 108 atoms
D : 1 atoms for 100 atom
Q.no 56. An echo is heard when direct sound waves coming from the source and its reflected wave reach the listener with a time interval of about
A : 1/14 seconds
B : 1/3 seconds
C : 1/7 seconds
D : 1/19 seconds
Q.no 57. The name given to the unit of sound absorption is-
A : decibel
B : degree
C : sabine
D : watt
Q.no 58. Schrodinger's equation is required for explaining behavior of subatomic particles because
A : Subatomic particles show wave particle duality
B : Matter wave is associated with subatomic waves
C : Newton's laws of motion cannot be applied to matter waves
D : All options are correct
Q.no 59. The basic principle of holography is
A : to create the interference pattern of object wave only
B : to create the interference pattern of reference wave only
C : to create the interference pattern of object wave and reference wave
D : none of the above
Q.no 60. The effective path or phase difference between the reflected rays for antirefiection films
A : λ/4 or π/2
B : λ or π/2
C : λ/2 or π
D : 2λor π/2
Answer for Question No 1. is b
Answer for Question No 2. is b
Answer for Question No 3. is b
Answer for Question No 4. is a
Answer for Question No 5. is d
Answer for Question No 6. is a
Answer for Question No 7. is c
Answer for Question No 8. is b
Answer for Question No 9. is d
Answer for Question No 10. is a
Answer for Question No 11. is c
Answer for Question No 12. is d
Answer for Question No 13. is c
Answer for Question No 14. is c
Answer for Question No 15. is a
Answer for Question No 16. is d
Answer for Question No 17. is d
Answer for Question No 18. is c
Answer for Question No 19. is d
Answer for Question No 20. is a
Answer for Question No 21. is d
Answer for Question No 22. is c
Answer for Question No 23. is c
Answer for Question No 24. is b
Answer for Question No 25. is a
Answer for Question No 26. is b
Answer for Question No 27. is b
Answer for Question No 28. is b
Answer for Question No 29. is a
Answer for Question No 30. is a
Answer for Question No 31. is b
Answer for Question No 32. is b
Answer for Question No 33. is b
Answer for Question No 34. is a
Answer for Question No 35. is a
Answer for Question No 36. is a
Answer for Question No 37. is a
Answer for Question No 38. is b
Answer for Question No 39. is a
Answer for Question No 40. is a
Answer for Question No 41. is a
Answer for Question No 42. is a
Answer for Question No 43. is d
Answer for Question No 44. is b
Answer for Question No 45. is a
Answer for Question No 46. is a
Answer for Question No 47. is d
Answer for Question No 48. is c
Answer for Question No 49. is b
Answer for Question No 50. is a
Answer for Question No 51. is b
Answer for Question No 52. is d
Answer for Question No 53. is d
Answer for Question No 54. is b
Answer for Question No 55. is c
Answer for Question No 56. is c
Answer for Question No 57. is c
Answer for Question No 58. is d
Answer for Question No 59. is c
Answer for Question No 60. is c
Seat No -
Total number of questions : 60
1000499 T1 ENGINEERING PHYSICS
Time : 1hr
Max Marks : 50
N.B
1) All questions are Multiple Choice Questions having single correct option.
2) Attempt any 50 questions out of 60.
3) Use of calculator is allowed.
4) Each question carries 1 Mark.
5) Specially abled students are allowed 20 minutes extra for examination.
6) Do not use pencils to darken answer.
7) Use only black/blue ball point pen to darken the appropriate circle.
8) No change will be allowed once the answer is marked on OMR Sheet.
9) Rough work shall not be done on OMR sheet or on question paper.
10) Darken ONLY ONE CIRCLE for each answer.
Q.no 1. ln Magnetostriction Oscillator
A : a copper rod is used
B : a nickel rod is used
C : a magnesium rod is used
D : an aluminium rod is used
Q.no 2. Photovoltaic cells convert light energy into
A : solar energy
B : electrical energy
C : mechanical energy
D : kinetic energy
Q.no 3. The phenomena of the echo is used to measure the
A : length of metal
B : flaws in metal
C : transfer signals
D : none
Q.no 4. ln superconductivity, the conductivity of a material becomes.
A : zero
B : finite
C : infinite
D : None of the above
Q.no 5. Ψ is called the wave function of the particle. If |Ψ|2 is 0.1, the probability of finding the particle at a given location at a given time is
A : 0.1
B : (0.1)2
C : (0.1)1/2
D : None of these
Q.no 6. LASER is a short form of
A : Light attenuation by stimulated emission of radiation
B : Light amplification by stimulated emission of radiation
C : Light absorption by stimulated emission of radiation
D : Light absorption by spontaneous emission of radiation
Q.no 7. To check the optical flatness of the surface in wedge-shape thin film fringe-width must be
A : Equal, straight
B : Unequal, straight
C : Unequal, curved
D : Equal, curved
Q.no 8. A path difference of 3λ/2 between the two waves corresponds to the phase difference
A : 3π/2
B : π/3
C : 3π
D : 2π/3
Q.no 9. When the light is incident at the polarizing angle, which of the following is completely polarized?
A : reflected light
B : refracted light
C : both reflected as well as refracted light
D : neither reflected nor refracted light
Q.no 10. __________ are used in sunscreen lotions to protect the skin from ultraviolet radiations
A : Zinc oxide and Titanium oxide nanoparticles
B : Talcum stone particles
C : Non-metal nanoparticles
D : Quantum dots
Q.no 11. Principal maxima for fraunhoffer single slit diffraction is obtained at ѳ
A : nλ
B : (n/2)π
C : 1
D : 0
Q.no 12. In forward bias, the width of depletion region in a p-n junction diode
A : increases
B : decreases
C : remains constant
D : first (A) then (B)
Q.no 13. If ne & nh are the number of electrons & holes in a semiconductor heavily doped with phosphorus, then
A : ne»nh
B : ne <nh
C : ne«nh
D : ne =nh
Q.no 14. If the gap between plano- convex lens and plane glass plate filled with the liquid instead of air then
A : Diameter of rings increases
B : Diameter of rings decreases
C : Diameter of rings does not change
D : All above are correct
Q.no 15. On reverse biasing the P-N junction,its depletion region becomes
A : narrow
B : zero
C : broad
D : constant
Q.no 16. For the wavefunction to be true or acceptable, the following conditions are to be followed by it
A : Continuous
B : Finite
C : Normalizable
D : All of these
Q.no 17. Plane polarized light can be produced by
A : Simple reflection
B : Pile of plates
C : Nicol’s prism
D : All of these
Q.no 18. When two semiconductors of p-type & n-type are brought in contact with each other, the P-N junction formed behaves like
A : an oscillator
B : an amplifier
C : a diode
D : a conductor
Q.no 19. The active medium of a helium-neon laser is made up with ________ ratio of helium-neon.
A : 10:1
B : 10:3
C : 10:5
D : 10:6
Q.no 20. Depth sounding technique is based on principle of
A : Cavitations
B : navigation
C : reflection
D : echo sounding
Q.no 21. What happens to O-ray and E-ray if they travel along the optic axis?
A : E-ray travels faster than O-ray
B : O-ray travels faster than E-ray
C : Both ray travels with same velocity
D : None of the above
Q.no 22. The phenomenon in which the magnetic line of force are expelled out of the superconducting material at Critical temperature is called.
A : isotopic effect
B : Meissner effect
C : BCS * theory
D : London theory
Q.no 23. The walls of the hall built for music concerns should
A : Amplify sound
B : Reflect sound
C : Transmit sound
D : D Absorb sound
Q.no 24. When a ray is reflected from denser medium, its phase changes by(in radian)
A : 0
B : π
C : 2π
D : 3π
Q.no 25. Loudness of sound is found to be proportional to the
A : log 10 L
B : log 10 I
C : area
D : log 10 s
Q.no 26. At the critical temperature and less than critical temperature the resistance of a superconductor.
A : increase rapidly
B : decrease rapidly
C : remains zero
D : increase slowly
Q.no 27. In Newton’s ring experiment if the air film is replaced by water film, then the diameter of the ring
A : Decreases
B : Increases
C : Remains same
D : None of the above
Q.no 28. In Fraunhoffer diffraction distance of slit from source and screen is
A : finite
B : infinite
C : parallel
D : not equal
Q.no 29. The impurity level in an extrinsic semiconductor is about of pure semiconductor
A : 10 atoms for 103 atoms
B : 10 atoms for 102 atoms
C : 1 atoms for 108 atoms
D : 1 atoms for 100 atom
Q.no 30. Optimum reverberation time for music is
A : 0.5 sec
B : 0.1lsec
C : l.2sec
D : Above 5 sec
Q.no 31. Ultrasonic waves are produced by
A : piezoelectric effect
B : Doppler effect
C : Peltier effect
D : magneto-optic effect
Q.no 32. The intensity of central bright band in the case of diffraction is
A : maximum
B : minimum
C : varies between max to min
D : none of above
Q.no 33. According to de Broglie hypothesis equation λ=h/p is applicable for
A : Matter particle only
B : Photons only
C : Both matter particle and photon
D : All options are correct
Q.no 34. At 0 K, intrinsic semiconductor behaves as
A : a perfect conductor
B : a super conductor
C : a semiconductor
D : a perfect insulator
Q.no 35. The speed of sound in medium depends upon
A : Amplitude
B : frequency
C : wavelength
D : properties of the medium
Q.no 36. What would be true for wavelengths of De Broglie waves
A : λ (electron) = λ (proton)
B : λ (electron) > λ (proton)
C : λ (electron) < λ (proton)
D : λ (electron) ~ λ (proton)
Q.no 37. We prefer Polaroid sunglasses because they
A : have soothing colours
B : reduce the intensity of light
C : are cheaper
D : can change colour
Q.no 38. In a semiconductor, current conduction is due to
A : only holes
B : both holes and free electrons
C : only free electrons
D : none of the above
Q.no 39. According to de Broglie hypothesis
A : A particle in rest has matter waves associated with it
B : A particle at rest or in motion has matter wave associated with it
C : A particle in motion has matter wave associated with it
D : All above statements are correct
Q.no 40. The quarter wave plate produces
A : Path difference of λ/4 or phase difference of π /2 radians between O- and E-waves
B : Path difference of λ /2 or phase difference of π /2 radians
C : Path difference of λ /4 or phase difference of π radians
D : None of the above
Q.no 41. In case of ruby laser, optical resonator cavity is formed by the silvered ends of
A : Ruby crystal
B : The Calcium crystal
C : Tourmaline crystal
D : Quartz crystal
Q.no 42. In an N-type semiconductor, donor level is
A : above the conduction band of the host
B : close to the conduction band of the host
C : close to the valence band of the host crystal.
D : below to the valence band of the host crystal
Q.no 43. Sound waves of frequency less than 20 Hz are called
A : longitudinal wave
B : ultrasonic wave
C : Infrasonic waves
D : mechanical wave
Q.no 44. Laevo-rotatory optically active substance rotates the plane of vibrations
A : In clockwise direction
B : In left hand side
C : By 1800
D : None of the above
Q.no 45. The Cooper pairs are electron pairs with
A : equal and same momentum
B : Unequal & same spin
C : Equal and opposite momentum and spin
D : Unequal & opposite spin and momentum
Q.no 46. Heisenberg Uncertainty Principle is significant for subatomic particles because
A : Their energy is small
B : They show wave particle duality
C : Their velocity is small
D : They show photoelectric effect
Q.no 47. The characteristics of laser beam are
A : Highly directional
B : Highly intense
C : Highly monochromatic
D : All of these
Q.no 48. The intensity level expressed in a unit
A : bel
B : 10-12W/m2
C : Newton
D : db/m
Q.no 49. In the Fresnel diffraction the incident wave front is
A : Spherical
B : Cylindrical
C : Spherical or cylindrical
D : Plane
Q.no 50. _ _ _ _ _ superconductor is completely diamagnetic
A : Type - l
B : Type - ll
C : both
D : none of the above
Q.no 51. When the temperature of n- type semiconductor is increased
A : net negative charge increases
B : minority carriers decreases
C : electron-hole pairs increases
D : none of the above
Q.no 52. Pumping process used in diode laser is
A : optical pumping
B : forward biased voltage
C : electrical discharge
D : none of these
Q.no 53. The minimum amount of current passed through the body of superconducter in order of destroy the superconductivity is called.
A : induced current
B : Critical current
C : Eddy current
D : super current
Q.no 54. Formation of colour in a thin film of oil is due to
A : Interference of light waves
B : Diffraction of light waves
C : Scattering of light rays rays
D : Dispersion of light rays
Q.no 55. The battery connection required to forward bias a p-n junction are
A : +ve terminal to p and —ve terminal to n
B : -ve terminal to p and —ve terminal to n
C : -ve terminal to p and +ve terminal to n
D : none of the above
Q.no 56. Schrodinger's equation is required for explaining behavior of subatomic particles because
A : Subatomic particles show wave particle duality
B : Matter wave is associated with subatomic waves
C : Newton's laws of motion cannot be applied to matter waves
D : All options are correct
Q.no 57. An echo is heard when direct sound waves coming from the source and its reflected wave reach the listener with a time interval of about
A : 1/14 seconds
B : 1/3 seconds
C : 1/7 seconds
D : 1/19 seconds
Q.no 58. The concept of wave function is insufficient to tell about probability of particle because
A : Wave function is negative at places of negative amplitude. Thus probability would come out to be negative which is meaningless.
B : Wave function is not single valued
C : Wave function is continuous. Ψ could have been considered as the sufficient function if it had been discontinuous.
D : Wave function directlty gives the uncertainty in position and not the probability.
Q.no 59. Intensity at any point on the screen at angle Ѳ for Fraunhoffer single slit is given by I
A : (n/2)π
B : Im(sinα/α)2
C : sin-1(nλ/a)
D : (sinα/α)2
Q.no 60. The effective path or phase difference between the reflected rays for antirefiection films
A : λ/4 or π/2
B : λ or π/2
C : λ/2 or π
D : 2λor π/2
Answer for Question No 1. is b
Answer for Question No 2. is b
Answer for Question No 3. is b
Answer for Question No 4. is c
Answer for Question No 5. is a
Answer for Question No 6. is b
Answer for Question No 7. is a
Answer for Question No 8. is c
Answer for Question No 9. is a
Answer for Question No 10. is a
Answer for Question No 11. is d
Answer for Question No 12. is b
Answer for Question No 13. is a
Answer for Question No 14. is b
Answer for Question No 15. is c
Answer for Question No 16. is d
Answer for Question No 17. is d
Answer for Question No 18. is c
Answer for Question No 19. is a
Answer for Question No 20. is d
Answer for Question No 21. is c
Answer for Question No 22. is b
Answer for Question No 23. is d
Answer for Question No 24. is b
Answer for Question No 25. is b
Answer for Question No 26. is c
Answer for Question No 27. is a
Answer for Question No 28. is b
Answer for Question No 29. is c
Answer for Question No 30. is c
Answer for Question No 31. is a
Answer for Question No 32. is a
Answer for Question No 33. is c
Answer for Question No 34. is d
Answer for Question No 35. is d
Answer for Question No 36. is b
Answer for Question No 37. is b
Answer for Question No 38. is c
Answer for Question No 39. is c
Answer for Question No 40. is a
Answer for Question No 41. is a
Answer for Question No 42. is b
Answer for Question No 43. is c
Answer for Question No 44. is b
Answer for Question No 45. is c
Answer for Question No 46. is b
Answer for Question No 47. is d
Answer for Question No 48. is a
Answer for Question No 49. is a
Answer for Question No 50. is a
Answer for Question No 51. is c
Answer for Question No 52. is b
Answer for Question No 53. is b
Answer for Question No 54. is a
Answer for Question No 55. is a
Answer for Question No 56. is d
Answer for Question No 57. is c
Answer for Question No 58. is a
Answer for Question No 59. is b
Answer for Question No 60. is c
Seat No -
Total number of questions : 60
1000499 T1 ENGINEERING PHYSICS
Time : 1hr
Max Marks : 50
N.B
1) All questions are Multiple Choice Questions having single correct option.
2) Attempt any 50 questions out of 60.
3) Use of calculator is allowed.
4) Each question carries 1 Mark.
5) Specially abled students are allowed 20 minutes extra for examination.
6) Do not use pencils to darken answer.
7) Use only black/blue ball point pen to darken the appropriate circle.
8) No change will be allowed once the answer is marked on OMR Sheet.
9) Rough work shall not be done on OMR sheet or on question paper.
10) Darken ONLY ONE CIRCLE for each answer.
Q.no 1. According to the Malu’s law, the intensity of polarized light emerging through the analyzer varies as
A : I =Iₒ cosθ
B : I =Iₒ/cos2θ
C : I =Iₒ / cos²θ
D : I =Iₒ cos²θ
Q.no 2. Current once initiated in a superconducting ring can continue to flow infinitely without any power losses
Is called
Is called
A : Infinite current
B : Critical current
C : Persistent current
D : induced current
Q.no 3. Formation of colour in a thin film of oil is due to
A : Interference of light waves
B : Diffraction of light waves
C : Scattering of light rays rays
D : Dispersion of light rays
Q.no 4. __________ are used in sunscreen lotions to protect the skin from ultraviolet radiations
A : Zinc oxide and Titanium oxide nanoparticles
B : Talcum stone particles
C : Non-metal nanoparticles
D : Quantum dots
Q.no 5. According to de Broglie hypothesis equation λ=h/p is applicable for
A : Matter particle only
B : Photons only
C : Both matter particle and photon
D : All options are correct
Q.no 6. What would be true for wavelengths of De Broglie waves
A : λ (electron) = λ (proton)
B : λ (electron) > λ (proton)
C : λ (electron) < λ (proton)
D : λ (electron) ~ λ (proton)
Q.no 7. To check the optical flatness of the surface in wedge-shape thin film fringe-width must be
A : Equal, straight
B : Unequal, straight
C : Unequal, curved
D : Equal, curved
Q.no 8. Photovoltaic cells convert light energy into
A : solar energy
B : electrical energy
C : mechanical energy
D : kinetic energy
Q.no 9. The points of constructive interference of light are
A : May be bright or dark
B : Always bright
C : Always dark
D : Neighter bight nor dark
Q.no 10. Principal maxima for fraunhoffer single slit diffraction is obtained at ѳ
A : nλ
B : (n/2)π
C : 1
D : 0
Q.no 11. We prefer Polaroid sunglasses because they
A : have soothing colours
B : reduce the intensity of light
C : are cheaper
D : can change colour
Q.no 12. The superconducting State is perfectly _ _ _ _ _ in nature.
A : Diamagnetic
B : Paramagnetic
C : Ferromagnetic
D : All above
Q.no 13. Effective path difference between two successive reflected rays by thin parallel film is
A : 2μtcosr+ λ/2
B : 0
C : 2μtcosr
D : 2μtcosr+n λ
Q.no 14. Heisenberg Uncertainty Principle is significant for subatomic particles because
A : Their energy is small
B : They show wave particle duality
C : Their velocity is small
D : They show photoelectric effect
Q.no 15. In case of ruby laser, optical resonator cavity is formed by the silvered ends of
A : Ruby crystal
B : The Calcium crystal
C : Tourmaline crystal
D : Quartz crystal
Q.no 16. A path difference of 3λ/2 between the two waves corresponds to the phase difference
A : 3π/2
B : π/3
C : 3π
D : 2π/3
Q.no 17. Superconductivity was first observed by
A : Volta
B : Meissner
C : Kamerling Onnes
D : Schrieffer
Q.no 18. Sound travel in the form of
A : longitudinal
B : transverse
C : mechanical
D : Infrasonic waves
Q.no 19. In Fraunhoffer diffraction distance of slit from source and screen is
A : finite
B : infinite
C : parallel
D : not equal
Q.no 20. The expression for the thickness of a half-wave plate of positive crystal is
A : t = λ / (μe - μo )
B : t = λ / 2(μe - μo )
C : t = λ / 3(μe - μo )
D : t = λ /2 (μo – μe )
Q.no 21. The walls of the hall built for music concerns should
A : Amplify sound
B : Reflect sound
C : Transmit sound
D : D Absorb sound
Q.no 22. For the wavefunction to be true or acceptable, the following conditions are to be followed by it
A : Continuous
B : Finite
C : Normalizable
D : All of these
Q.no 23. For an infinitely deep 1 dimentional potential well, a quantum particle in the ground state is likely to be found
A : at one corner of the well
B : At 1/4th and 3/4th distance from one end of the well
C : At every point in the well with equal probability
D : At the center of the well
Q.no 24. If ne & nh are the number of electrons & holes in a semiconductor heavily doped with phosphorus, then
A : ne»nh
B : ne <nh
C : ne«nh
D : ne =nh
Q.no 25. In Newton’s ring experiment ,with air as a medium between Plano convex lens and glass plate, diameter of nth dark ring is
A : √4nrλ
B : √4nr
C : √(2n-1)2rλ
D : √4nr/λ
Q.no 26. Reverberation time T of a hall varies is inversely proportional as the
A : density
B : degree of sensation
C : effective area
D : square of amplitude
Q.no 27. At the critical temperature and less than critical temperature the resistance of a superconductor.
A : increase rapidly
B : decrease rapidly
C : remains zero
D : increase slowly
Q.no 28. Ψ is called the wave function of the particle. If |Ψ|2 is 0.1, the probability of finding the particle at a given location at a given time is
A : 0.1
B : (0.1)2
C : (0.1)1/2
D : None of these
Q.no 29. piezoelectric effect has been observed in
A : nickel
B : glass
C : quartz
D : mica
Q.no 30. Reverse bias applied on a junction diode-----------
A : raises the potential barrier
B : decrease the minority carrier current
C : increases the majority carrier current
D : lowers the potential barrier
Q.no 31. The impurity level in an extrinsic semiconductor is about of pure semiconductor
A : 10 atoms for 103 atoms
B : 10 atoms for 102 atoms
C : 1 atoms for 108 atoms
D : 1 atoms for 100 atom
Q.no 32. What happens to O-ray and E-ray if they travel along the optic axis?
A : E-ray travels faster than O-ray
B : O-ray travels faster than E-ray
C : Both ray travels with same velocity
D : None of the above
Q.no 33. ln superconductivity, the conductivity of a material becomes.
A : zero
B : finite
C : infinite
D : None of the above
Q.no 34. Loudness of sound is found to be proportional to the
A : log 10 L
B : log 10 I
C : area
D : log 10 s
Q.no 35. The phenomenon in which the magnetic line of force are expelled out of the superconducting material at Critical temperature is called.
A : isotopic effect
B : Meissner effect
C : BCS * theory
D : London theory
Q.no 36. The minimum amount of current passed through the body of superconducter in order of destroy the superconductivity is called.
A : induced current
B : Critical current
C : Eddy current
D : super current
Q.no 37. Pumping process used in diode laser is
A : optical pumping
B : forward biased voltage
C : electrical discharge
D : none of these
Q.no 38. Depletion layer consists of
A : electrons
B : mobile ions
C : protons.
D : immobile ions
Q.no 39. De Broglie wave is expresssed in terms of Ψ. What is Ψ?
A : It is the energy of particles producing matter waves
B : It is the momentum of particles producing matter waves
C : It is the uncertainity in position of particles producing matter waves
D : It represents the oscillations of quantity that produces matter waves.
Q.no 40. When a ray is reflected from denser medium, its phase changes by(in radian)
A : 0
B : π
C : 2π
D : 3π
Q.no 41. Ultrasonic waves are produced by
A : piezoelectric effect
B : Doppler effect
C : Peltier effect
D : magneto-optic effect
Q.no 42. Intensity of diffraction at an angle ѳ for fraunhoffer diffraction by grating is given by Iѳ
A : (sinNβ/ sinβ)
B : (sinβ)2
C : (sinα/α)2
D : Im(sinα/α)2 (sinNβ/ sinβ)2
Q.no 43. Quantum mechanically, minimum energy of a particle enclosed in a potential well cannot be
A : 1 eV
B : zero
C : 100 eV
D : 1 KeV
Q.no 44. The current in a superconductor produces
A : zero, voltage drop across it
B : a strong, electric field around it
C : a small voltage drop across it
D : a large voltage drop across it
Q.no 45. Optimum reverberation time for music is
A : 0.5 sec
B : 0.1lsec
C : l.2sec
D : Above 5 sec
Q.no 46. Bending of light around the straight edge of obstacle and spreading into its geometrical shadow is called as
A : Diffraction
B : Interference
C : Polarization
D : Dispersion
Q.no 47. Matter waves would be more significant for particles having mass
A : About 10 x 103 g
B : About 10 x 10-14 g
C : About 10 x 1014 g
D : About 10 x 10 -28 g
Q.no 48. The battery connection required to forward bias a p-n junction are
A : +ve terminal to p and —ve terminal to n
B : -ve terminal to p and —ve terminal to n
C : -ve terminal to p and +ve terminal to n
D : none of the above
Q.no 49. For the Solar cell the ratio of maximum power delivered to ideal power is called as
A : Efficiency
B : Fill factor
C : short-circuit
D : Open-circuit
Q.no 50. LASER is a short form of
A : Light attenuation by stimulated emission of radiation
B : Light amplification by stimulated emission of radiation
C : Light absorption by stimulated emission of radiation
D : Light absorption by spontaneous emission of radiation
Q.no 51. The light source used for optical pumping in Ruby laser is
A : Xenon
B : Argon
C : Neon
D : none of the above
Q.no 52. When the size of the material reduces, the surface area to volume ratio ________
A : decreases
B : Increases
C : remains same
D : becomes exactly equal to the volume
Q.no 53. In Newton's rings the central spot is
A : Always bright
B : Always dark
C : Can be bright or dark
D : Of blue colour
Q.no 54. Types - l superconductors are ___________ temperature superconductor.
A : low
B : absolute
C : High
D : None of the Above
Q.no 55. The normalization condition indicates that probabilities of finding the particle
A : in a small volume summed up over the entire space must give 1
B : in a small volume must give 1
C : in a small volume summed up along the positive direction must give 1
D : in a small volume summed up along the negative direction must give 1
Q.no 56. Ultrasonic are sound waves having frequency greater than
A : 20 MHz
B : 20 kHz
C : 20GHz
D : 20 Hz
Q.no 57. The reverberation time is the time required for the intensity to drop by
A : 30dB
B : 90dB
C : C 60dB
D : 120dB
Q.no 58. Heisenberg Uncertainty Principle is not significant for daily life objects because
A : The value of Planck's constant is insignificant for these particles
B : It is difficult to observe wave particle duality in daily life objects
C : Daily life objects are macroscopic
D : All of these
Q.no 59. The name given to the unit of sound absorption is-
A : decibel
B : degree
C : sabine
D : watt
Q.no 60. The concept of wave function is insufficient to tell about probability of particle because
A : Wave function is negative at places of negative amplitude. Thus probability would come out to be negative which is meaningless.
B : Wave function is not single valued
C : Wave function is continuous. Ψ could have been considered as the sufficient function if it had been discontinuous.
D : Wave function directlty gives the uncertainty in position and not the probability.
Answer for Question No 1. is d
Answer for Question No 2. is c
Answer for Question No 3. is a
Answer for Question No 4. is a
Answer for Question No 5. is c
Answer for Question No 6. is b
Answer for Question No 7. is a
Answer for Question No 8. is b
Answer for Question No 9. is b
Answer for Question No 10. is d
Answer for Question No 11. is b
Answer for Question No 12. is a
Answer for Question No 13. is a
Answer for Question No 14. is b
Answer for Question No 15. is a
Answer for Question No 16. is c
Answer for Question No 17. is a
Answer for Question No 18. is a
Answer for Question No 19. is b
Answer for Question No 20. is b
Answer for Question No 21. is d
Answer for Question No 22. is d
Answer for Question No 23. is d
Answer for Question No 24. is a
Answer for Question No 25. is a
Answer for Question No 26. is c
Answer for Question No 27. is c
Answer for Question No 28. is a
Answer for Question No 29. is c
Answer for Question No 30. is a
Answer for Question No 31. is c
Answer for Question No 32. is c
Answer for Question No 33. is c
Answer for Question No 34. is b
Answer for Question No 35. is b
Answer for Question No 36. is b
Answer for Question No 37. is b
Answer for Question No 38. is d
Answer for Question No 39. is d
Answer for Question No 40. is b
Answer for Question No 41. is a
Answer for Question No 42. is d
Answer for Question No 43. is b
Answer for Question No 44. is a
Answer for Question No 45. is c
Answer for Question No 46. is a
Answer for Question No 47. is d
Answer for Question No 48. is a
Answer for Question No 49. is b
Answer for Question No 50. is b
Answer for Question No 51. is a
Answer for Question No 52. is b
Answer for Question No 53. is b
Answer for Question No 54. is a
Answer for Question No 55. is a
Answer for Question No 56. is b
Answer for Question No 57. is c
Answer for Question No 58. is d
Answer for Question No 59. is c
Answer for Question No 60. is a
Seat No -
Total number of questions : 60
1000499 T1 ENGINEERING PHYSICS
Time : 1hr
Max Marks : 50
N.B
1) All questions are Multiple Choice Questions having single correct option.
2) Attempt any 50 questions out of 60.
3) Use of calculator is allowed.
4) Each question carries 1 Mark.
5) Specially abled students are allowed 20 minutes extra for examination.
6) Do not use pencils to darken answer.
7) Use only black/blue ball point pen to darken the appropriate circle.
8) No change will be allowed once the answer is marked on OMR Sheet.
9) Rough work shall not be done on OMR sheet or on question paper.
10) Darken ONLY ONE CIRCLE for each answer.
Q.no 1. When the size of the material is reduced to size in nano region, the energy band structure undergo______________which mainly accounts for the change in the properties of nanoparticles
A : Small variations
B : large variations
C : Splitting
D : scattering
Q.no 2. Formation of colour in a thin film of oil is due to
A : Interference of light waves
B : Diffraction of light waves
C : Scattering of light rays rays
D : Dispersion of light rays
Q.no 3. In Fraunhoffer diffraction distance of slit from source and screen is
A : finite
B : infinite
C : parallel
D : not equal
Q.no 4. A hologram is most similar to a
A : Dispersion
B : prism
C : 3-D photograph
D : compound lens
Q.no 5. The expression for the thickness of a half-wave plate of positive crystal is
A : t = λ / (μe - μo )
B : t = λ / 2(μe - μo )
C : t = λ / 3(μe - μo )
D : t = λ /2 (μo – μe )
Q.no 6. The main principle of optical fiber is
A : total internal dispersion
B : total internal reflection
C : total internal refraction
D : none of the above
Q.no 7. For the Solar cell the ratio of maximum power delivered to ideal power is called as
A : Efficiency
B : Fill factor
C : short-circuit
D : Open-circuit
Q.no 8. piezoelectric effect has been observed in
A : nickel
B : glass
C : quartz
D : mica
Q.no 9. _________ superconductors are also called soft superconductors
A : Type I
B : Type II
C : Type III
D : Type IV
Q.no 10. The minimum amount of current passed through the body of superconducter in order of destroy the superconductivity is called.
A : induced current
B : Critical current
C : Eddy current
D : super current
Q.no 11. The current in a superconductor produces
A : zero, voltage drop across it
B : a strong, electric field around it
C : a small voltage drop across it
D : a large voltage drop across it
Q.no 12. According to de Broglie hypothesis equation λ=h/p is applicable for
A : Matter particle only
B : Photons only
C : Both matter particle and photon
D : All options are correct
Q.no 13. Pumping process used in diode laser is
A : optical pumping
B : forward biased voltage
C : electrical discharge
D : none of these
Q.no 14. The impurity level in an extrinsic semiconductor is about of pure semiconductor
A : 10 atoms for 103 atoms
B : 10 atoms for 102 atoms
C : 1 atoms for 108 atoms
D : 1 atoms for 100 atom
Q.no 15. In a narrow wave packet of matter wave
A : The position of the particle cannot be determined accurately
B : The momentum of the particle cannot be determined accurately
C : Concept of wave group does not exist
D : Phase velocity is always zero
Q.no 16. When the temperature of n- type semiconductor is increased
A : net negative charge increases
B : minority carriers decreases
C : electron-hole pairs increases
D : none of the above
Q.no 17. On reverse biasing the P-N junction,its depletion region becomes
A : narrow
B : zero
C : broad
D : constant
Q.no 18. _ _ _ _ _ superconductor is completely diamagnetic
A : Type - l
B : Type - ll
C : both
D : none of the above
Q.no 19. The phenomena of the echo is used to measure the
A : length of metal
B : flaws in metal
C : transfer signals
D : none
Q.no 20. ln Magnetostriction Oscillator
A : a copper rod is used
B : a nickel rod is used
C : a magnesium rod is used
D : an aluminium rod is used
Q.no 21. According to the Malu’s law, the intensity of polarized light emerging through the analyzer varies as
A : I =Iₒ cosθ
B : I =Iₒ/cos2θ
C : I =Iₒ / cos²θ
D : I =Iₒ cos²θ
Q.no 22. Fringe width is defined as the distance between two consecutive
A : Crests
B : Bright fringes only
C : Dark fringes only
D : Bright or dark fringes
Q.no 23. The characteristics of laser beam are
A : Highly directional
B : Highly intense
C : Highly monochromatic
D : All of these
Q.no 24. The intensity of central bright band in the case of diffraction is
A : maximum
B : minimum
C : varies between max to min
D : none of above
Q.no 25. Ψ is called the wave function of the particle. If |Ψ|2 is 0.1, the probability of finding the particle at a given location at a given time is
A : 0.1
B : (0.1)2
C : (0.1)1/2
D : None of these
Q.no 26. The phenomenon in which the magnetic line of force are expelled out of the superconducting material at Critical temperature is called.
A : isotopic effect
B : Meissner effect
C : BCS * theory
D : London theory
Q.no 27. The points of constructive interference of light are
A : May be bright or dark
B : Always bright
C : Always dark
D : Neighter bight nor dark
Q.no 28. In Newton's rings the central spot is
A : Always bright
B : Always dark
C : Can be bright or dark
D : Of blue colour
Q.no 29. Depth sounding technique is based on principle of
A : Cavitations
B : navigation
C : reflection
D : echo sounding
Q.no 30. For the wavefunction to be true or acceptable, the following conditions are to be followed by it
A : Continuous
B : Finite
C : Normalizable
D : All of these
Q.no 31. When the size of the material reduces, the surface area to volume ratio ________
A : decreases
B : Increases
C : remains same
D : becomes exactly equal to the volume
Q.no 32. In Newton’s ring experiment if the air film is replaced by water film, then the diameter of the ring
A : Decreases
B : Increases
C : Remains same
D : None of the above
Q.no 33. Nanotechnology is the science of designing,creating and using the materials in which atleast one dimension has a size in the range of
A : 1nm-100nm
B : 0.01nm to 0.1 nm
C : 100 nm- 1000nm
D : 30- 50 nm
Q.no 34. Sound intensity is
A : energy/time
B : wb/m3
C : watt/m2
D : energy/time. area
Q.no 35. LASER is a short form of
A : Light attenuation by stimulated emission of radiation
B : Light amplification by stimulated emission of radiation
C : Light absorption by stimulated emission of radiation
D : Light absorption by spontaneous emission of radiation
Q.no 36. Laser action is possible only if there is
A : a set of reflecting mirrors
B : a black body
C : population inversion
D : oscillations of laser source
Q.no 37. In forward bias, the width of depletion region in a p-n junction diode
A : increases
B : decreases
C : remains constant
D : first (A) then (B)
Q.no 38. The quarter wave plate produces
A : Path difference of λ/4 or phase difference of π /2 radians between O- and E-waves
B : Path difference of λ /2 or phase difference of π /2 radians
C : Path difference of λ /4 or phase difference of π radians
D : None of the above
Q.no 39. When a ray is reflected from denser medium, its phase changes by(in radian)
A : 0
B : π
C : 2π
D : 3π
Q.no 40. The battery connection required to forward bias a p-n junction are
A : +ve terminal to p and —ve terminal to n
B : -ve terminal to p and —ve terminal to n
C : -ve terminal to p and +ve terminal to n
D : none of the above
Q.no 41. The walls of the hall built for music concerns should
A : Amplify sound
B : Reflect sound
C : Transmit sound
D : D Absorb sound
Q.no 42. In Newton’s ring experiment ,with air as a medium between Plano convex lens and glass plate, diameter of nth dark ring is
A : √4nrλ
B : √4nr
C : √(2n-1)2rλ
D : √4nr/λ
Q.no 43. Quantum mechanically, minimum energy of a particle enclosed in a potential well cannot be
A : 1 eV
B : zero
C : 100 eV
D : 1 KeV
Q.no 44. The active medium of a helium-neon laser is made up with ________ ratio of helium-neon.
A : 10:1
B : 10:3
C : 10:5
D : 10:6
Q.no 45. In case of ruby laser, optical resonator cavity is formed by the silvered ends of
A : Ruby crystal
B : The Calcium crystal
C : Tourmaline crystal
D : Quartz crystal
Q.no 46. In the Fresnel diffraction the incident wave front is
A : Spherical
B : Cylindrical
C : Spherical or cylindrical
D : Plane
Q.no 47. Photovoltaic cells convert light energy into
A : solar energy
B : electrical energy
C : mechanical energy
D : kinetic energy
Q.no 48. The superconducting State is perfectly _ _ _ _ _ in nature.
A : Diamagnetic
B : Paramagnetic
C : Ferromagnetic
D : All above
Q.no 49. When the light is incident at the polarizing angle, which of the following is completely polarized?
A : reflected light
B : refracted light
C : both reflected as well as refracted light
D : neither reflected nor refracted light
Q.no 50. Superconductivity was first observed by
A : Volta
B : Meissner
C : Kamerling Onnes
D : Schrieffer
Q.no 51. Types - l superconductors are ___________ temperature superconductor.
A : low
B : absolute
C : High
D : None of the Above
Q.no 52. In the P-type semiconductor, the hole concentration in valence band is----------- than the electron concentration in conduction band.
A : less than
B : greater than
C : equal to
D : all of these
Q.no 53. Plane polarized light has vibrations
A : In one direction perpendicular to direction of propagation
B : Along the direction of propagation
C : In two directions perpendicular to direction of propagation
D : In all directions perpendicular to direction of propagation
Q.no 54. If the material is reduced to nano size then properties of those materials _____________ from those of the bulk material
A : slightly differ
B : drastically differ
C : remain same
D : can’t say
Q.no 55. The speed of sound in medium depends upon
A : Amplitude
B : frequency
C : wavelength
D : properties of the medium
Q.no 56. An echo is heard when direct sound waves coming from the source and its reflected wave reach the listener with a time interval of about
A : 1/14 seconds
B : 1/3 seconds
C : 1/7 seconds
D : 1/19 seconds
Q.no 57. The effective path or phase difference between the reflected rays for antirefiection films
A : λ/4 or π/2
B : λ or π/2
C : λ/2 or π
D : 2λor π/2
Q.no 58. The basic principle of holography is
A : to create the interference pattern of object wave only
B : to create the interference pattern of reference wave only
C : to create the interference pattern of object wave and reference wave
D : none of the above
Q.no 59. The name given to the unit of sound absorption is-
A : decibel
B : degree
C : sabine
D : watt
Q.no 60. The concept of wave function is insufficient to tell about probability of particle because
A : Wave function is negative at places of negative amplitude. Thus probability would come out to be negative which is meaningless.
B : Wave function is not single valued
C : Wave function is continuous. Ψ could have been considered as the sufficient function if it had been discontinuous.
D : Wave function directlty gives the uncertainty in position and not the probability.
Answer for Question No 1. is b
Answer for Question No 2. is a
Answer for Question No 3. is b
Answer for Question No 4. is c
Answer for Question No 5. is b
Answer for Question No 6. is b
Answer for Question No 7. is b
Answer for Question No 8. is c
Answer for Question No 9. is a
Answer for Question No 10. is b
Answer for Question No 11. is a
Answer for Question No 12. is c
Answer for Question No 13. is b
Answer for Question No 14. is c
Answer for Question No 15. is b
Answer for Question No 16. is c
Answer for Question No 17. is c
Answer for Question No 18. is a
Answer for Question No 19. is b
Answer for Question No 20. is b
Answer for Question No 21. is d
Answer for Question No 22. is d
Answer for Question No 23. is d
Answer for Question No 24. is a
Answer for Question No 25. is a
Answer for Question No 26. is b
Answer for Question No 27. is b
Answer for Question No 28. is b
Answer for Question No 29. is d
Answer for Question No 30. is d
Answer for Question No 31. is b
Answer for Question No 32. is a
Answer for Question No 33. is a
Answer for Question No 34. is d
Answer for Question No 35. is b
Answer for Question No 36. is c
Answer for Question No 37. is b
Answer for Question No 38. is a
Answer for Question No 39. is b
Answer for Question No 40. is a
Answer for Question No 41. is d
Answer for Question No 42. is a
Answer for Question No 43. is b
Answer for Question No 44. is a
Answer for Question No 45. is a
Answer for Question No 46. is a
Answer for Question No 47. is b
Answer for Question No 48. is a
Answer for Question No 49. is a
Answer for Question No 50. is a
Answer for Question No 51. is a
Answer for Question No 52. is b
Answer for Question No 53. is a
Answer for Question No 54. is b
Answer for Question No 55. is d
Answer for Question No 56. is c
Answer for Question No 57. is c
Answer for Question No 58. is c
Answer for Question No 59. is c
Answer for Question No 60. is a
Seat No -
Total number of questions : 60
1000499 T1 ENGINEERING PHYSICS
Time : 1hr
Max Marks : 50
N.B
1) All questions are Multiple Choice Questions having single correct option.
2) Attempt any 50 questions out of 60.
3) Use of calculator is allowed.
4) Each question carries 1 Mark.
5) Specially abled students are allowed 20 minutes extra for examination.
6) Do not use pencils to darken answer.
7) Use only black/blue ball point pen to darken the appropriate circle.
8) No change will be allowed once the answer is marked on OMR Sheet.
9) Rough work shall not be done on OMR sheet or on question paper.
10) Darken ONLY ONE CIRCLE for each answer.
Q.no 1. In a narrow wave packet of matter wave
A : The position of the particle cannot be determined accurately
B : The momentum of the particle cannot be determined accurately
C : Concept of wave group does not exist
D : Phase velocity is always zero
Q.no 2. The superconducting State is perfectly _ _ _ _ _ in nature.
A : Diamagnetic
B : Paramagnetic
C : Ferromagnetic
D : All above
Q.no 3. Intensity of diffraction at an angle ѳ for fraunhoffer diffraction by grating is given by Iѳ
A : (sinNβ/ sinβ)
B : (sinβ)2
C : (sinα/α)2
D : Im(sinα/α)2 (sinNβ/ sinβ)2
Q.no 4. When two semiconductors of p-type & n-type are brought in contact with each other, the P-N junction formed behaves like
A : an oscillator
B : an amplifier
C : a diode
D : a conductor
Q.no 5. The quarter wave plate produces
A : Path difference of λ/4 or phase difference of π /2 radians between O- and E-waves
B : Path difference of λ /2 or phase difference of π /2 radians
C : Path difference of λ /4 or phase difference of π radians
D : None of the above
Q.no 6. When the temperature of n- type semiconductor is increased
A : net negative charge increases
B : minority carriers decreases
C : electron-hole pairs increases
D : none of the above
Q.no 7. Types - l superconductors are ___________ temperature superconductor.
A : low
B : absolute
C : High
D : None of the Above
Q.no 8. In Fraunhoffer diffraction distance of slit from source and screen is
A : finite
B : infinite
C : parallel
D : not equal
Q.no 9. In the P-type semiconductor, the hole concentration in valence band is----------- than the electron concentration in conduction band.
A : less than
B : greater than
C : equal to
D : all of these
Q.no 10. The minimum amount of current passed through the body of superconducter in order of destroy the superconductivity is called.
A : induced current
B : Critical current
C : Eddy current
D : super current
Q.no 11. The intensity of central bright band in the case of diffraction is
A : maximum
B : minimum
C : varies between max to min
D : none of above
Q.no 12. For the wavefunction to be true or acceptable, the following conditions are to be followed by it
A : Continuous
B : Finite
C : Normalizable
D : All of these
Q.no 13. In Newton’s ring experiment if the air film is replaced by water film, then the diameter of the ring
A : Decreases
B : Increases
C : Remains same
D : None of the above
Q.no 14. Sound waves of frequency less than 20 Hz are called
A : longitudinal wave
B : ultrasonic wave
C : Infrasonic waves
D : mechanical wave
Q.no 15. For the Solar cell the ratio of maximum power delivered to ideal power is called as
A : Efficiency
B : Fill factor
C : short-circuit
D : Open-circuit
Q.no 16. Principal maxima for fraunhoffer single slit diffraction is obtained at ѳ
A : nλ
B : (n/2)π
C : 1
D : 0
Q.no 17. When the light is incident at the polarizing angle, which of the following is completely polarized?
A : reflected light
B : refracted light
C : both reflected as well as refracted light
D : neither reflected nor refracted light
Q.no 18. The phenomenon in which the magnetic line of force are expelled out of the superconducting material at Critical temperature is called.
A : isotopic effect
B : Meissner effect
C : BCS * theory
D : London theory
Q.no 19. Wave function Ψ represents
A : Potential energy of particles producing matter waves
B : Oscillations of quantity that produces matter waves
C : Momentum of particles that produces matter waves
D : Kinetic energy of particles producing matter waves
Q.no 20. The Fermi level in intrinsic semiconductor lies exactly at the of the forbidden band
A : above
B : center
C : below
D : none of these
Q.no 21. Data storage capacities of hard disks and have led to small and faster microprocessors due to the use of ______________
A : Nanosized electronic components
B : Pure semiconductors
C : Capacitive components
D : Inductive components
Q.no 22. Plane polarized light can be produced by
A : Simple reflection
B : Pile of plates
C : Nicol’s prism
D : All of these
Q.no 23. Ultrasonic waves are produced by
A : piezoelectric effect
B : Doppler effect
C : Peltier effect
D : magneto-optic effect
Q.no 24. The current in a superconductor produces
A : zero, voltage drop across it
B : a strong, electric field around it
C : a small voltage drop across it
D : a large voltage drop across it
Q.no 25. In the Fresnel diffraction the incident wave front is
A : Spherical
B : Cylindrical
C : Spherical or cylindrical
D : Plane
Q.no 26. What would be true for wavelengths of De Broglie waves
A : λ (electron) = λ (proton)
B : λ (electron) > λ (proton)
C : λ (electron) < λ (proton)
D : λ (electron) ~ λ (proton)
Q.no 27. De Broglie wave is expresssed in terms of Ψ. What is Ψ?
A : It is the energy of particles producing matter waves
B : It is the momentum of particles producing matter waves
C : It is the uncertainity in position of particles producing matter waves
D : It represents the oscillations of quantity that produces matter waves.
Q.no 28. On reverse biasing the P-N junction,its depletion region becomes
A : narrow
B : zero
C : broad
D : constant
Q.no 29. Plane polarized light has vibrations
A : In one direction perpendicular to direction of propagation
B : Along the direction of propagation
C : In two directions perpendicular to direction of propagation
D : In all directions perpendicular to direction of propagation
Q.no 30. Sound travel in the form of
A : longitudinal
B : transverse
C : mechanical
D : Infrasonic waves
Q.no 31. ln superconductivity, the conductivity of a material becomes.
A : zero
B : finite
C : infinite
D : None of the above
Q.no 32. According to the Malu’s law, the intensity of polarized light emerging through the analyzer varies as
A : I =Iₒ cosθ
B : I =Iₒ/cos2θ
C : I =Iₒ / cos²θ
D : I =Iₒ cos²θ
Q.no 33. Depth sounding technique is based on principle of
A : Cavitations
B : navigation
C : reflection
D : echo sounding
Q.no 34. When the size of the material reduces, the surface area to volume ratio ________
A : decreases
B : Increases
C : remains same
D : becomes exactly equal to the volume
Q.no 35. In a semiconductor, current conduction is due to
A : only holes
B : both holes and free electrons
C : only free electrons
D : none of the above
Q.no 36. To check the optical flatness of the surface in wedge-shape thin film fringe-width must be
A : Equal, straight
B : Unequal, straight
C : Unequal, curved
D : Equal, curved
Q.no 37. Nanotechnology is the science of designing,creating and using the materials in which atleast one dimension has a size in the range of
A : 1nm-100nm
B : 0.01nm to 0.1 nm
C : 100 nm- 1000nm
D : 30- 50 nm
Q.no 38. The walls of the hall built for music concerns should
A : Amplify sound
B : Reflect sound
C : Transmit sound
D : D Absorb sound
Q.no 39. n type & p type silicon can be obtained by doping pure silicon with
A : Arsenic & Phosphorus
B : Indium & Aluminum
C : Phosphorus & Indium
D : Aluminum & Boron
Q.no 40. Superconductivity was first observed by
A : Volta
B : Meissner
C : Kamerling Onnes
D : Schrieffer
Q.no 41. piezoelectric effect has been observed in
A : nickel
B : glass
C : quartz
D : mica
Q.no 42. The expression for the thickness of a half-wave plate of positive crystal is
A : t = λ / (μe - μo )
B : t = λ / 2(μe - μo )
C : t = λ / 3(μe - μo )
D : t = λ /2 (μo – μe )
Q.no 43. What happens to O-ray and E-ray if they travel along the optic axis?
A : E-ray travels faster than O-ray
B : O-ray travels faster than E-ray
C : Both ray travels with same velocity
D : None of the above
Q.no 44. If ne & nh are the number of electrons & holes in a semiconductor heavily doped with phosphorus, then
A : ne»nh
B : ne <nh
C : ne«nh
D : ne =nh
Q.no 45. Photovoltaic cells convert light energy into
A : solar energy
B : electrical energy
C : mechanical energy
D : kinetic energy
Q.no 46. _ _ _ _ _ superconductor is completely diamagnetic
A : Type - l
B : Type - ll
C : both
D : none of the above
Q.no 47. If the gap between plano- convex lens and plane glass plate filled with the liquid instead of air then
A : Diameter of rings increases
B : Diameter of rings decreases
C : Diameter of rings does not change
D : All above are correct
Q.no 48. Which of the following cannot be polarized?
A : Radio waves
B : Sound waves
C : Light waves
D : X-rays
Q.no 49. The light source used for optical pumping in Ruby laser is
A : Xenon
B : Argon
C : Neon
D : none of the above
Q.no 50. The impurity level in an extrinsic semiconductor is about of pure semiconductor
A : 10 atoms for 103 atoms
B : 10 atoms for 102 atoms
C : 1 atoms for 108 atoms
D : 1 atoms for 100 atom
Q.no 51. Quantum mechanically, minimum energy of a particle enclosed in a potential well cannot be
A : 1 eV
B : zero
C : 100 eV
D : 1 KeV
Q.no 52. Formation of colour in a thin film of oil is due to
A : Interference of light waves
B : Diffraction of light waves
C : Scattering of light rays rays
D : Dispersion of light rays
Q.no 53. Laevo-rotatory optically active substance rotates the plane of vibrations
A : In clockwise direction
B : In left hand side
C : By 1800
D : None of the above
Q.no 54. At the critical temperature and less than critical temperature the resistance of a superconductor.
A : increase rapidly
B : decrease rapidly
C : remains zero
D : increase slowly
Q.no 55. Which is the correct relation for forbidden energy gap in conductor, semi-conductor and insulator?
A : ΔEg conductor > ΔEg semiconductor> ΔEginsulator
B : ΔEgconductor > ΔEginsulator > Δ Eg semiconductor
C : ΔEginsulator > Δ Eg semiconductor > ΔEgconductor
D : ΔEg semiconductor > Δ Egconductor > ΔEginsulator
Q.no 56. Matter waves are associated with
A : Positively charged particles
B : Negatively charged particles
C : Neutral particles
D : All of these
Q.no 57. Schrodinger's equation is required for explaining behavior of subatomic particles because
A : Subatomic particles show wave particle duality
B : Matter wave is associated with subatomic waves
C : Newton's laws of motion cannot be applied to matter waves
D : All options are correct
Q.no 58. Ultrasonic are sound waves having frequency greater than
A : 20 MHz
B : 20 kHz
C : 20GHz
D : 20 Hz
Q.no 59. The basic principle of holography is
A : to create the interference pattern of object wave only
B : to create the interference pattern of reference wave only
C : to create the interference pattern of object wave and reference wave
D : none of the above
Q.no 60. Heisenberg Uncertainty Principle is not significant for daily life objects because
A : The value of Planck's constant is insignificant for these particles
B : It is difficult to observe wave particle duality in daily life objects
C : Daily life objects are macroscopic
D : All of these
Answer for Question No 1. is b
Answer for Question No 2. is a
Answer for Question No 3. is d
Answer for Question No 4. is c
Answer for Question No 5. is a
Answer for Question No 6. is c
Answer for Question No 7. is a
Answer for Question No 8. is b
Answer for Question No 9. is b
Answer for Question No 10. is b
Answer for Question No 11. is a
Answer for Question No 12. is d
Answer for Question No 13. is a
Answer for Question No 14. is c
Answer for Question No 15. is b
Answer for Question No 16. is d
Answer for Question No 17. is a
Answer for Question No 18. is b
Answer for Question No 19. is b
Answer for Question No 20. is b
Answer for Question No 21. is a
Answer for Question No 22. is d
Answer for Question No 23. is a
Answer for Question No 24. is a
Answer for Question No 25. is a
Answer for Question No 26. is b
Answer for Question No 27. is d
Answer for Question No 28. is c
Answer for Question No 29. is a
Answer for Question No 30. is a
Answer for Question No 31. is c
Answer for Question No 32. is d
Answer for Question No 33. is d
Answer for Question No 34. is b
Answer for Question No 35. is c
Answer for Question No 36. is a
Answer for Question No 37. is a
Answer for Question No 38. is d
Answer for Question No 39. is c
Answer for Question No 40. is a
Answer for Question No 41. is c
Answer for Question No 42. is b
Answer for Question No 43. is c
Answer for Question No 44. is a
Answer for Question No 45. is b
Answer for Question No 46. is a
Answer for Question No 47. is b
Answer for Question No 48. is b
Answer for Question No 49. is a
Answer for Question No 50. is c
Answer for Question No 51. is b
Answer for Question No 52. is a
Answer for Question No 53. is b
Answer for Question No 54. is c
Answer for Question No 55. is c
Answer for Question No 56. is d
Answer for Question No 57. is d
Answer for Question No 58. is b
Answer for Question No 59. is c
Answer for Question No 60. is d
Seat No -
Total number of questions : 60
1000499 T1 ENGINEERING PHYSICS
Time : 1hr
Max Marks : 50
N.B
1) All questions are Multiple Choice Questions having single correct option.
2) Attempt any 50 questions out of 60.
3) Use of calculator is allowed.
4) Each question carries 1 Mark.
5) Specially abled students are allowed 20 minutes extra for examination.
6) Do not use pencils to darken answer.
7) Use only black/blue ball point pen to darken the appropriate circle.
8) No change will be allowed once the answer is marked on OMR Sheet.
9) Rough work shall not be done on OMR sheet or on question paper.
10) Darken ONLY ONE CIRCLE for each answer.
Q.no 1. Depletion layer consists of
A : electrons
B : mobile ions
C : protons.
D : immobile ions
Q.no 2. Plane polarized light can be produced by
A : Simple reflection
B : Pile of plates
C : Nicol’s prism
D : All of these
Q.no 3. Effective path difference between two successive reflected rays by thin parallel film is
A : 2μtcosr+ λ/2
B : 0
C : 2μtcosr
D : 2μtcosr+n λ
Q.no 4. Reverse bias applied on a junction diode-----------
A : raises the potential barrier
B : decrease the minority carrier current
C : increases the majority carrier current
D : lowers the potential barrier
Q.no 5. Laevo-rotatory optically active substance rotates the plane of vibrations
A : In clockwise direction
B : In left hand side
C : By 1800
D : None of the above
Q.no 6. Intensity of diffraction at an angle ѳ for fraunhoffer diffraction by grating is given by Iѳ
A : (sinNβ/ sinβ)
B : (sinβ)2
C : (sinα/α)2
D : Im(sinα/α)2 (sinNβ/ sinβ)2
Q.no 7. For the Solar cell the ratio of maximum power delivered to ideal power is called as
A : Efficiency
B : Fill factor
C : short-circuit
D : Open-circuit
Q.no 8. Laser action is possible only if there is
A : a set of reflecting mirrors
B : a black body
C : population inversion
D : oscillations of laser source
Q.no 9. Which of the following cannot be polarized?
A : Radio waves
B : Sound waves
C : Light waves
D : X-rays
Q.no 10. Reverberation time T of a hall varies is inversely proportional as the
A : density
B : degree of sensation
C : effective area
D : square of amplitude
Q.no 11. In forward bias, the width of depletion region in a p-n junction diode
A : increases
B : decreases
C : remains constant
D : first (A) then (B)
Q.no 12. The battery connection required to forward bias a p-n junction are
A : +ve terminal to p and —ve terminal to n
B : -ve terminal to p and —ve terminal to n
C : -ve terminal to p and +ve terminal to n
D : none of the above
Q.no 13. In Newton’s ring experiment ,with air as a medium between Plano convex lens and glass plate, diameter of nth dark ring is
A : √4nrλ
B : √4nr
C : √(2n-1)2rλ
D : √4nr/λ
Q.no 14. Matter waves would be more significant for particles having mass
A : About 10 x 103 g
B : About 10 x 10-14 g
C : About 10 x 1014 g
D : About 10 x 10 -28 g
Q.no 15. The characteristics of laser beam are
A : Highly directional
B : Highly intense
C : Highly monochromatic
D : All of these
Q.no 16. A hologram is most similar to a
A : Dispersion
B : prism
C : 3-D photograph
D : compound lens
Q.no 17. Wave function Ψ represents
A : Potential energy of particles producing matter waves
B : Oscillations of quantity that produces matter waves
C : Momentum of particles that produces matter waves
D : Kinetic energy of particles producing matter waves
Q.no 18. In Newton’s ring experiment if the air film is replaced by water film, then the diameter of the ring
A : Decreases
B : Increases
C : Remains same
D : None of the above
Q.no 19. The quarter wave plate produces
A : Path difference of λ/4 or phase difference of π /2 radians between O- and E-waves
B : Path difference of λ /2 or phase difference of π /2 radians
C : Path difference of λ /4 or phase difference of π radians
D : None of the above
Q.no 20. The main principle of optical fiber is
A : total internal dispersion
B : total internal reflection
C : total internal refraction
D : none of the above
Q.no 21. Pumping process used in diode laser is
A : optical pumping
B : forward biased voltage
C : electrical discharge
D : none of these
Q.no 22. On reverse biasing the P-N junction,its depletion region becomes
A : narrow
B : zero
C : broad
D : constant
Q.no 23. Loudness of sound is found to be proportional to the
A : log 10 L
B : log 10 I
C : area
D : log 10 s
Q.no 24. The speed of sound in medium depends upon
A : Amplitude
B : frequency
C : wavelength
D : properties of the medium
Q.no 25. Bending of light around the straight edge of obstacle and spreading into its geometrical shadow is called as
A : Diffraction
B : Interference
C : Polarization
D : Dispersion
Q.no 26. When a ray is reflected from denser medium, its phase changes by(in radian)
A : 0
B : π
C : 2π
D : 3π
Q.no 27. To check the optical flatness of the surface in wedge-shape thin film fringe-width must be
A : Equal, straight
B : Unequal, straight
C : Unequal, curved
D : Equal, curved
Q.no 28. For constructive interference the path difference should be
A : Zero or odd multiple of wavelength
B : Only integral multiple of wavelength
C : 0
D : Zero or integral multiple of wavelength
Q.no 29. In case of ruby laser, optical resonator cavity is formed by the silvered ends of
A : Ruby crystal
B : The Calcium crystal
C : Tourmaline crystal
D : Quartz crystal
Q.no 30. According to the Malu’s law, the intensity of polarized light emerging through the analyzer varies as
A : I =Iₒ cosθ
B : I =Iₒ/cos2θ
C : I =Iₒ / cos²θ
D : I =Iₒ cos²θ
Q.no 31. Heisenberg Uncertainty Principle is significant for subatomic particles because
A : Their energy is small
B : They show wave particle duality
C : Their velocity is small
D : They show photoelectric effect
Q.no 32. The light source used for optical pumping in Ruby laser is
A : Xenon
B : Argon
C : Neon
D : none of the above
Q.no 33. The temperature at which conductivity of material becomes infinite is called.
A : Critical temperature
B : absolute temperature
C : Mean temperature
D : Crystallization temperature
Q.no 34. If the material is reduced to nano size then properties of those materials _____________ from those of the bulk material
A : slightly differ
B : drastically differ
C : remain same
D : can’t say
Q.no 35. When the size of the material is reduced to size in nano region, the energy band structure undergo______________which mainly accounts for the change in the properties of nanoparticles
A : Small variations
B : large variations
C : Splitting
D : scattering
Q.no 36. LASER is a short form of
A : Light attenuation by stimulated emission of radiation
B : Light amplification by stimulated emission of radiation
C : Light absorption by stimulated emission of radiation
D : Light absorption by spontaneous emission of radiation
Q.no 37. The walls of the hall built for music concerns should
A : Amplify sound
B : Reflect sound
C : Transmit sound
D : D Absorb sound
Q.no 38. If the gap between plano- convex lens and plane glass plate filled with the liquid instead of air then
A : Diameter of rings increases
B : Diameter of rings decreases
C : Diameter of rings does not change
D : All above are correct
Q.no 39. The impurity level in an extrinsic semiconductor is about of pure semiconductor
A : 10 atoms for 103 atoms
B : 10 atoms for 102 atoms
C : 1 atoms for 108 atoms
D : 1 atoms for 100 atom
Q.no 40. The intensity level expressed in a unit
A : bel
B : 10-12W/m2
C : Newton
D : db/m
Q.no 41. The phenomena of the echo is used to measure the
A : length of metal
B : flaws in metal
C : transfer signals
D : none
Q.no 42. In Fraunhoffer diffraction distance of slit from source and screen is
A : finite
B : infinite
C : parallel
D : not equal
Q.no 43. In the P-type semiconductor, the hole concentration in valence band is----------- than the electron concentration in conduction band.
A : less than
B : greater than
C : equal to
D : all of these
Q.no 44. Fringe width is defined as the distance between two consecutive
A : Crests
B : Bright fringes only
C : Dark fringes only
D : Bright or dark fringes
Q.no 45. The active medium of a helium-neon laser is made up with ________ ratio of helium-neon.
A : 10:1
B : 10:3
C : 10:5
D : 10:6
Q.no 46. The intensity of central bright band in the case of diffraction is
A : maximum
B : minimum
C : varies between max to min
D : none of above
Q.no 47. For an infinitely deep 1 dimentional potential well, a quantum particle in the ground state is likely to be found
A : at one corner of the well
B : At 1/4th and 3/4th distance from one end of the well
C : At every point in the well with equal probability
D : At the center of the well
Q.no 48. Photovoltaic cells convert light energy into
A : solar energy
B : electrical energy
C : mechanical energy
D : kinetic energy
Q.no 49. Data storage capacities of hard disks and have led to small and faster microprocessors due to the use of ______________
A : Nanosized electronic components
B : Pure semiconductors
C : Capacitive components
D : Inductive components
Q.no 50. The forbidden energy gap in an insulator is of the order of
A : 1 eV
B : 2 eV
C : 0.1 eV
D : 5 eV
Q.no 51. According to de Broglie hypothesis
A : A particle in rest has matter waves associated with it
B : A particle at rest or in motion has matter wave associated with it
C : A particle in motion has matter wave associated with it
D : All above statements are correct
Q.no 52. The superconducting State is perfectly _ _ _ _ _ in nature.
A : Diamagnetic
B : Paramagnetic
C : Ferromagnetic
D : All above
Q.no 53. _________ superconductors are also called soft superconductors
A : Type I
B : Type II
C : Type III
D : Type IV
Q.no 54. The phenomenon in which the magnetic line of force are expelled out of the superconducting material at Critical temperature is called.
A : isotopic effect
B : Meissner effect
C : BCS * theory
D : London theory
Q.no 55. A path difference of 3λ/2 between the two waves corresponds to the phase difference
A : 3π/2
B : π/3
C : 3π
D : 2π/3
Q.no 56. The basic principle of holography is
A : to create the interference pattern of object wave only
B : to create the interference pattern of reference wave only
C : to create the interference pattern of object wave and reference wave
D : none of the above
Q.no 57. The concept of wave function is insufficient to tell about probability of particle because
A : Wave function is negative at places of negative amplitude. Thus probability would come out to be negative which is meaningless.
B : Wave function is not single valued
C : Wave function is continuous. Ψ could have been considered as the sufficient function if it had been discontinuous.
D : Wave function directlty gives the uncertainty in position and not the probability.
Q.no 58. The effective path or phase difference between the reflected rays for antirefiection films
A : λ/4 or π/2
B : λ or π/2
C : λ/2 or π
D : 2λor π/2
Q.no 59. An echo is heard when direct sound waves coming from the source and its reflected wave reach the listener with a time interval of about
A : 1/14 seconds
B : 1/3 seconds
C : 1/7 seconds
D : 1/19 seconds
Q.no 60. The name given to the unit of sound absorption is-
A : decibel
B : degree
C : sabine
D : watt
Answer for Question No 1. is d
Answer for Question No 2. is d
Answer for Question No 3. is a
Answer for Question No 4. is a
Answer for Question No 5. is b
Answer for Question No 6. is d
Answer for Question No 7. is b
Answer for Question No 8. is c
Answer for Question No 9. is b
Answer for Question No 10. is c
Answer for Question No 11. is b
Answer for Question No 12. is a
Answer for Question No 13. is a
Answer for Question No 14. is d
Answer for Question No 15. is d
Answer for Question No 16. is c
Answer for Question No 17. is b
Answer for Question No 18. is a
Answer for Question No 19. is a
Answer for Question No 20. is b
Answer for Question No 21. is b
Answer for Question No 22. is c
Answer for Question No 23. is b
Answer for Question No 24. is d
Answer for Question No 25. is a
Answer for Question No 26. is b
Answer for Question No 27. is a
Answer for Question No 28. is d
Answer for Question No 29. is a
Answer for Question No 30. is d
Answer for Question No 31. is b
Answer for Question No 32. is a
Answer for Question No 33. is a
Answer for Question No 34. is b
Answer for Question No 35. is b
Answer for Question No 36. is b
Answer for Question No 37. is d
Answer for Question No 38. is b
Answer for Question No 39. is c
Answer for Question No 40. is a
Answer for Question No 41. is b
Answer for Question No 42. is b
Answer for Question No 43. is b
Answer for Question No 44. is d
Answer for Question No 45. is a
Answer for Question No 46. is a
Answer for Question No 47. is d
Answer for Question No 48. is b
Answer for Question No 49. is a
Answer for Question No 50. is d
Answer for Question No 51. is c
Answer for Question No 52. is a
Answer for Question No 53. is a
Answer for Question No 54. is b
Answer for Question No 55. is c
Answer for Question No 56. is c
Answer for Question No 57. is a
Answer for Question No 58. is c
Answer for Question No 59. is c
Answer for Question No 60. is c
Seat No -
Total number of questions : 60
1000499 T1 ENGINEERING PHYSICS
Time : 1hr
Max Marks : 50
N.B
1) All questions are Multiple Choice Questions having single correct option.
2) Attempt any 50 questions out of 60.
3) Use of calculator is allowed.
4) Each question carries 1 Mark.
5) Specially abled students are allowed 20 minutes extra for examination.
6) Do not use pencils to darken answer.
7) Use only black/blue ball point pen to darken the appropriate circle.
8) No change will be allowed once the answer is marked on OMR Sheet.
9) Rough work shall not be done on OMR sheet or on question paper.
10) Darken ONLY ONE CIRCLE for each answer.
Q.no 1. Data storage capacities of hard disks and have led to small and faster microprocessors due to the use of ______________
A : Nanosized electronic components
B : Pure semiconductors
C : Capacitive components
D : Inductive components
Q.no 2. Superconductivity was first observed by
A : Volta
B : Meissner
C : Kamerling Onnes
D : Schrieffer
Q.no 3. The active medium of a helium-neon laser is made up with ________ ratio of helium-neon.
A : 10:1
B : 10:3
C : 10:5
D : 10:6
Q.no 4. For an infinitely deep 1 dimentional potential well, a quantum particle in the ground state is likely to be found
A : at one corner of the well
B : At 1/4th and 3/4th distance from one end of the well
C : At every point in the well with equal probability
D : At the center of the well
Q.no 5. If the material is reduced to nano size then properties of those materials _____________ from those of the bulk material
A : slightly differ
B : drastically differ
C : remain same
D : can’t say
Q.no 6. piezoelectric effect has been observed in
A : nickel
B : glass
C : quartz
D : mica
Q.no 7. Quantum mechanically, minimum energy of a particle enclosed in a potential well cannot be
A : 1 eV
B : zero
C : 100 eV
D : 1 KeV
Q.no 8. Formation of colour in a thin film of oil is due to
A : Interference of light waves
B : Diffraction of light waves
C : Scattering of light rays rays
D : Dispersion of light rays
Q.no 9. Heisenberg Uncertainty Principle is significant for subatomic particles because
A : Their energy is small
B : They show wave particle duality
C : Their velocity is small
D : They show photoelectric effect
Q.no 10. To check the optical flatness of the surface in wedge-shape thin film fringe-width must be
A : Equal, straight
B : Unequal, straight
C : Unequal, curved
D : Equal, curved
Q.no 11. The walls of the hall built for music concerns should
A : Amplify sound
B : Reflect sound
C : Transmit sound
D : D Absorb sound
Q.no 12. The battery connection required to forward bias a p-n junction are
A : +ve terminal to p and —ve terminal to n
B : -ve terminal to p and —ve terminal to n
C : -ve terminal to p and +ve terminal to n
D : none of the above
Q.no 13. The quarter wave plate produces
A : Path difference of λ/4 or phase difference of π /2 radians between O- and E-waves
B : Path difference of λ /2 or phase difference of π /2 radians
C : Path difference of λ /4 or phase difference of π radians
D : None of the above
Q.no 14. When the size of the material is reduced to size in nano region, the energy band structure undergo______________which mainly accounts for the change in the properties of nanoparticles
A : Small variations
B : large variations
C : Splitting
D : scattering
Q.no 15. Intensity of diffraction at an angle ѳ for fraunhoffer diffraction by grating is given by Iѳ
A : (sinNβ/ sinβ)
B : (sinβ)2
C : (sinα/α)2
D : Im(sinα/α)2 (sinNβ/ sinβ)2
Q.no 16. De Broglie wave is expresssed in terms of Ψ. What is Ψ?
A : It is the energy of particles producing matter waves
B : It is the momentum of particles producing matter waves
C : It is the uncertainity in position of particles producing matter waves
D : It represents the oscillations of quantity that produces matter waves.
Q.no 17. What happens to O-ray and E-ray if they travel along the optic axis?
A : E-ray travels faster than O-ray
B : O-ray travels faster than E-ray
C : Both ray travels with same velocity
D : None of the above
Q.no 18. In a narrow wave packet of matter wave
A : The position of the particle cannot be determined accurately
B : The momentum of the particle cannot be determined accurately
C : Concept of wave group does not exist
D : Phase velocity is always zero
Q.no 19. ln Magnetostriction Oscillator
A : a copper rod is used
B : a nickel rod is used
C : a magnesium rod is used
D : an aluminium rod is used
Q.no 20. According to the Malu’s law, the intensity of polarized light emerging through the analyzer varies as
A : I =Iₒ cosθ
B : I =Iₒ/cos2θ
C : I =Iₒ / cos²θ
D : I =Iₒ cos²θ
Q.no 21. When two semiconductors of p-type & n-type are brought in contact with each other, the P-N junction formed behaves like
A : an oscillator
B : an amplifier
C : a diode
D : a conductor
Q.no 22. The superconducting State is perfectly _ _ _ _ _ in nature.
A : Diamagnetic
B : Paramagnetic
C : Ferromagnetic
D : All above
Q.no 23. Depletion layer consists of
A : electrons
B : mobile ions
C : protons.
D : immobile ions
Q.no 24. Laser action is possible only if there is
A : a set of reflecting mirrors
B : a black body
C : population inversion
D : oscillations of laser source
Q.no 25. Reverse bias applied on a junction diode-----------
A : raises the potential barrier
B : decrease the minority carrier current
C : increases the majority carrier current
D : lowers the potential barrier
Q.no 26. Sound travel in the form of
A : longitudinal
B : transverse
C : mechanical
D : Infrasonic waves
Q.no 27. For constructive interference the path difference should be
A : Zero or odd multiple of wavelength
B : Only integral multiple of wavelength
C : 0
D : Zero or integral multiple of wavelength
Q.no 28. Laevo-rotatory optically active substance rotates the plane of vibrations
A : In clockwise direction
B : In left hand side
C : By 1800
D : None of the above
Q.no 29. Sound waves of frequency less than 20 Hz are called
A : longitudinal wave
B : ultrasonic wave
C : Infrasonic waves
D : mechanical wave
Q.no 30. For the wavefunction to be true or acceptable, the following conditions are to be followed by it
A : Continuous
B : Finite
C : Normalizable
D : All of these
Q.no 31. Fringe width is defined as the distance between two consecutive
A : Crests
B : Bright fringes only
C : Dark fringes only
D : Bright or dark fringes
Q.no 32. Current once initiated in a superconducting ring can continue to flow infinitely without any power losses
Is called
Is called
A : Infinite current
B : Critical current
C : Persistent current
D : induced current
Q.no 33. Depth sounding technique is based on principle of
A : Cavitations
B : navigation
C : reflection
D : echo sounding
Q.no 34. If ne & nh are the number of electrons & holes in a semiconductor heavily doped with phosphorus, then
A : ne»nh
B : ne <nh
C : ne«nh
D : ne =nh
Q.no 35. The impurity level in an extrinsic semiconductor is about of pure semiconductor
A : 10 atoms for 103 atoms
B : 10 atoms for 102 atoms
C : 1 atoms for 108 atoms
D : 1 atoms for 100 atom
Q.no 36. Types - l superconductors are ___________ temperature superconductor.
A : low
B : absolute
C : High
D : None of the Above
Q.no 37. According to de Broglie hypothesis equation λ=h/p is applicable for
A : Matter particle only
B : Photons only
C : Both matter particle and photon
D : All options are correct
Q.no 38. The light source used for optical pumping in Ruby laser is
A : Xenon
B : Argon
C : Neon
D : none of the above
Q.no 39. Matter waves would be more significant for particles having mass
A : About 10 x 103 g
B : About 10 x 10-14 g
C : About 10 x 1014 g
D : About 10 x 10 -28 g
Q.no 40. A path difference of 3λ/2 between the two waves corresponds to the phase difference
A : 3π/2
B : π/3
C : 3π
D : 2π/3
Q.no 41. Which of the following will remain unchanged when a sound wave travels in air or in water?
A : Amplitude
B : frequency
C : wavelength
D : Speed
Q.no 42. ln superconductivity, the conductivity of a material becomes.
A : zero
B : finite
C : infinite
D : None of the above
Q.no 43. What would be true for wavelengths of De Broglie waves
A : λ (electron) = λ (proton)
B : λ (electron) > λ (proton)
C : λ (electron) < λ (proton)
D : λ (electron) ~ λ (proton)
Q.no 44. The expression for the thickness of a half-wave plate of positive crystal is
A : t = λ / (μe - μo )
B : t = λ / 2(μe - μo )
C : t = λ / 3(μe - μo )
D : t = λ /2 (μo – μe )
Q.no 45. __________ are used in sunscreen lotions to protect the skin from ultraviolet radiations
A : Zinc oxide and Titanium oxide nanoparticles
B : Talcum stone particles
C : Non-metal nanoparticles
D : Quantum dots
Q.no 46. When the size of the material reduces, the surface area to volume ratio ________
A : decreases
B : Increases
C : remains same
D : becomes exactly equal to the volume
Q.no 47. At 0 K, intrinsic semiconductor behaves as
A : a perfect conductor
B : a super conductor
C : a semiconductor
D : a perfect insulator
Q.no 48. Pumping process used in diode laser is
A : optical pumping
B : forward biased voltage
C : electrical discharge
D : none of these
Q.no 49. The minimum amount of current passed through the body of superconducter in order of destroy the superconductivity is called.
A : induced current
B : Critical current
C : Eddy current
D : super current
Q.no 50. In Fraunhoffer diffraction distance of slit from source and screen is
A : finite
B : infinite
C : parallel
D : not equal
Q.no 51. _ _ _ _ _ superconductor is completely diamagnetic
A : Type - l
B : Type - ll
C : both
D : none of the above
Q.no 52. Reverberation time T of a hall varies is inversely proportional as the
A : density
B : degree of sensation
C : effective area
D : square of amplitude
Q.no 53. In forward bias, the width of depletion region in a p-n junction diode
A : increases
B : decreases
C : remains constant
D : first (A) then (B)
Q.no 54. The intensity of central bright band in the case of diffraction is
A : maximum
B : minimum
C : varies between max to min
D : none of above
Q.no 55. The main principle of optical fiber is
A : total internal dispersion
B : total internal reflection
C : total internal refraction
D : none of the above
Q.no 56. The concept of wave function is insufficient to tell about probability of particle because
A : Wave function is negative at places of negative amplitude. Thus probability would come out to be negative which is meaningless.
B : Wave function is not single valued
C : Wave function is continuous. Ψ could have been considered as the sufficient function if it had been discontinuous.
D : Wave function directlty gives the uncertainty in position and not the probability.
Q.no 57. The basic principle of holography is
A : to create the interference pattern of object wave only
B : to create the interference pattern of reference wave only
C : to create the interference pattern of object wave and reference wave
D : none of the above
Q.no 58. Schrodinger's equation is required for explaining behavior of subatomic particles because
A : Subatomic particles show wave particle duality
B : Matter wave is associated with subatomic waves
C : Newton's laws of motion cannot be applied to matter waves
D : All options are correct
Q.no 59. Ultrasonic are sound waves having frequency greater than
A : 20 MHz
B : 20 kHz
C : 20GHz
D : 20 Hz
Q.no 60. Matter waves are associated with
A : Positively charged particles
B : Negatively charged particles
C : Neutral particles
D : All of these
Answer for Question No 1. is a
Answer for Question No 2. is a
Answer for Question No 3. is a
Answer for Question No 4. is d
Answer for Question No 5. is b
Answer for Question No 6. is c
Answer for Question No 7. is b
Answer for Question No 8. is a
Answer for Question No 9. is b
Answer for Question No 10. is a
Answer for Question No 11. is d
Answer for Question No 12. is a
Answer for Question No 13. is a
Answer for Question No 14. is b
Answer for Question No 15. is d
Answer for Question No 16. is d
Answer for Question No 17. is c
Answer for Question No 18. is b
Answer for Question No 19. is b
Answer for Question No 20. is d
Answer for Question No 21. is c
Answer for Question No 22. is a
Answer for Question No 23. is d
Answer for Question No 24. is c
Answer for Question No 25. is a
Answer for Question No 26. is a
Answer for Question No 27. is d
Answer for Question No 28. is b
Answer for Question No 29. is c
Answer for Question No 30. is d
Answer for Question No 31. is d
Answer for Question No 32. is c
Answer for Question No 33. is d
Answer for Question No 34. is a
Answer for Question No 35. is c
Answer for Question No 36. is a
Answer for Question No 37. is c
Answer for Question No 38. is a
Answer for Question No 39. is d
Answer for Question No 40. is c
Answer for Question No 41. is b
Answer for Question No 42. is c
Answer for Question No 43. is b
Answer for Question No 44. is b
Answer for Question No 45. is a
Answer for Question No 46. is b
Answer for Question No 47. is d
Answer for Question No 48. is b
Answer for Question No 49. is b
Answer for Question No 50. is b
Answer for Question No 51. is a
Answer for Question No 52. is c
Answer for Question No 53. is b
Answer for Question No 54. is a
Answer for Question No 55. is b
Answer for Question No 56. is a
Answer for Question No 57. is c
Answer for Question No 58. is d
Answer for Question No 59. is b
Answer for Question No 60. is d
Seat No -
Total number of questions : 60
1000499 T1 ENGINEERING PHYSICS
Time : 1hr
Max Marks : 50
N.B
1) All questions are Multiple Choice Questions having single correct option.
2) Attempt any 50 questions out of 60.
3) Use of calculator is allowed.
4) Each question carries 1 Mark.
5) Specially abled students are allowed 20 minutes extra for examination.
6) Do not use pencils to darken answer.
7) Use only black/blue ball point pen to darken the appropriate circle.
8) No change will be allowed once the answer is marked on OMR Sheet.
9) Rough work shall not be done on OMR sheet or on question paper.
10) Darken ONLY ONE CIRCLE for each answer.
Q.no 1. When a ray is reflected from denser medium, its phase changes by(in radian)
A : 0
B : π
C : 2π
D : 3π
Q.no 2. Plane polarized light can be produced by
A : Simple reflection
B : Pile of plates
C : Nicol’s prism
D : All of these
Q.no 3. Fringe width is defined as the distance between two consecutive
A : Crests
B : Bright fringes only
C : Dark fringes only
D : Bright or dark fringes
Q.no 4. Pumping process used in diode laser is
A : optical pumping
B : forward biased voltage
C : electrical discharge
D : none of these
Q.no 5. The walls of the hall built for music concerns should
A : Amplify sound
B : Reflect sound
C : Transmit sound
D : D Absorb sound
Q.no 6. De Broglie wave is expresssed in terms of Ψ. What is Ψ?
A : It is the energy of particles producing matter waves
B : It is the momentum of particles producing matter waves
C : It is the uncertainity in position of particles producing matter waves
D : It represents the oscillations of quantity that produces matter waves.
Q.no 7. Bending of light around the straight edge of obstacle and spreading into its geometrical shadow is called as
A : Diffraction
B : Interference
C : Polarization
D : Dispersion
Q.no 8. Data storage capacities of hard disks and have led to small and faster microprocessors due to the use of ______________
A : Nanosized electronic components
B : Pure semiconductors
C : Capacitive components
D : Inductive components
Q.no 9. In Fraunhoffer diffraction distance of slit from source and screen is
A : finite
B : infinite
C : parallel
D : not equal
Q.no 10. For an infinitely deep 1 dimentional potential well, a quantum particle in the ground state is likely to be found
A : at one corner of the well
B : At 1/4th and 3/4th distance from one end of the well
C : At every point in the well with equal probability
D : At the center of the well
Q.no 11. In the Fresnel diffraction the incident wave front is
A : Spherical
B : Cylindrical
C : Spherical or cylindrical
D : Plane
Q.no 12. We prefer Polaroid sunglasses because they
A : have soothing colours
B : reduce the intensity of light
C : are cheaper
D : can change colour
Q.no 13. Nanotechnology is the science of designing,creating and using the materials in which atleast one dimension has a size in the range of
A : 1nm-100nm
B : 0.01nm to 0.1 nm
C : 100 nm- 1000nm
D : 30- 50 nm
Q.no 14. The Cooper pairs are electron pairs with
A : equal and same momentum
B : Unequal & same spin
C : Equal and opposite momentum and spin
D : Unequal & opposite spin and momentum
Q.no 15. According to de Broglie hypothesis
A : A particle in rest has matter waves associated with it
B : A particle at rest or in motion has matter wave associated with it
C : A particle in motion has matter wave associated with it
D : All above statements are correct
Q.no 16. For the wavefunction to be true or acceptable, the following conditions are to be followed by it
A : Continuous
B : Finite
C : Normalizable
D : All of these
Q.no 17. The speed of sound in medium depends upon
A : Amplitude
B : frequency
C : wavelength
D : properties of the medium
Q.no 18. Effective path difference between two successive reflected rays by thin parallel film is
A : 2μtcosr+ λ/2
B : 0
C : 2μtcosr
D : 2μtcosr+n λ
Q.no 19. Photovoltaic cells convert light energy into
A : solar energy
B : electrical energy
C : mechanical energy
D : kinetic energy
Q.no 20. In a narrow wave packet of matter wave
A : The position of the particle cannot be determined accurately
B : The momentum of the particle cannot be determined accurately
C : Concept of wave group does not exist
D : Phase velocity is always zero
Q.no 21. The expression for the thickness of a half-wave plate of positive crystal is
A : t = λ / (μe - μo )
B : t = λ / 2(μe - μo )
C : t = λ / 3(μe - μo )
D : t = λ /2 (μo – μe )
Q.no 22. The current in a superconductor produces
A : zero, voltage drop across it
B : a strong, electric field around it
C : a small voltage drop across it
D : a large voltage drop across it
Q.no 23. Sound intensity is
A : energy/time
B : wb/m3
C : watt/m2
D : energy/time. area
Q.no 24. The light source used for optical pumping in Ruby laser is
A : Xenon
B : Argon
C : Neon
D : none of the above
Q.no 25. The superconducting State is perfectly _ _ _ _ _ in nature.
A : Diamagnetic
B : Paramagnetic
C : Ferromagnetic
D : All above
Q.no 26. _ _ _ _ _ superconductor is completely diamagnetic
A : Type - l
B : Type - ll
C : both
D : none of the above
Q.no 27. Laser action is possible only if there is
A : a set of reflecting mirrors
B : a black body
C : population inversion
D : oscillations of laser source
Q.no 28. In Newton’s ring experiment if the air film is replaced by water film, then the diameter of the ring
A : Decreases
B : Increases
C : Remains same
D : None of the above
Q.no 29. In the P-type semiconductor, the hole concentration in valence band is----------- than the electron concentration in conduction band.
A : less than
B : greater than
C : equal to
D : all of these
Q.no 30. Laevo-rotatory optically active substance rotates the plane of vibrations
A : In clockwise direction
B : In left hand side
C : By 1800
D : None of the above
Q.no 31. The quarter wave plate produces
A : Path difference of λ/4 or phase difference of π /2 radians between O- and E-waves
B : Path difference of λ /2 or phase difference of π /2 radians
C : Path difference of λ /4 or phase difference of π radians
D : None of the above
Q.no 32. The battery connection required to forward bias a p-n junction are
A : +ve terminal to p and —ve terminal to n
B : -ve terminal to p and —ve terminal to n
C : -ve terminal to p and +ve terminal to n
D : none of the above
Q.no 33. Reverberation time T of a hall varies is inversely proportional as the
A : density
B : degree of sensation
C : effective area
D : square of amplitude
Q.no 34. Ψ is called the wave function of the particle. If |Ψ|2 is 0.1, the probability of finding the particle at a given location at a given time is
A : 0.1
B : (0.1)2
C : (0.1)1/2
D : None of these
Q.no 35. In Newton’s ring experiment ,with air as a medium between Plano convex lens and glass plate, diameter of nth dark ring is
A : √4nrλ
B : √4nr
C : √(2n-1)2rλ
D : √4nr/λ
Q.no 36. The minimum amount of current passed through the body of superconducter in order of destroy the superconductivity is called.
A : induced current
B : Critical current
C : Eddy current
D : super current
Q.no 37. Depth sounding technique is based on principle of
A : Cavitations
B : navigation
C : reflection
D : echo sounding
Q.no 38. A hologram is most similar to a
A : Dispersion
B : prism
C : 3-D photograph
D : compound lens
Q.no 39. The impurity level in an extrinsic semiconductor is about of pure semiconductor
A : 10 atoms for 103 atoms
B : 10 atoms for 102 atoms
C : 1 atoms for 108 atoms
D : 1 atoms for 100 atom
Q.no 40. To check the optical flatness of the surface in wedge-shape thin film fringe-width must be
A : Equal, straight
B : Unequal, straight
C : Unequal, curved
D : Equal, curved
Q.no 41. n type & p type silicon can be obtained by doping pure silicon with
A : Arsenic & Phosphorus
B : Indium & Aluminum
C : Phosphorus & Indium
D : Aluminum & Boron
Q.no 42. _________ superconductors are also called soft superconductors
A : Type I
B : Type II
C : Type III
D : Type IV
Q.no 43. Intensity of diffraction at an angle ѳ for fraunhoffer diffraction by grating is given by Iѳ
A : (sinNβ/ sinβ)
B : (sinβ)2
C : (sinα/α)2
D : Im(sinα/α)2 (sinNβ/ sinβ)2
Q.no 44. Superconductivity was first observed by
A : Volta
B : Meissner
C : Kamerling Onnes
D : Schrieffer
Q.no 45. Current once initiated in a superconducting ring can continue to flow infinitely without any power losses
Is called
Is called
A : Infinite current
B : Critical current
C : Persistent current
D : induced current
Q.no 46. The phenomenon in which the magnetic line of force are expelled out of the superconducting material at Critical temperature is called.
A : isotopic effect
B : Meissner effect
C : BCS * theory
D : London theory
Q.no 47. Which of the following cannot be polarized?
A : Radio waves
B : Sound waves
C : Light waves
D : X-rays
Q.no 48. ln superconductivity, the conductivity of a material becomes.
A : zero
B : finite
C : infinite
D : None of the above
Q.no 49. Principal maxima for fraunhoffer single slit diffraction is obtained at ѳ
A : nλ
B : (n/2)π
C : 1
D : 0
Q.no 50. LASER is a short form of
A : Light attenuation by stimulated emission of radiation
B : Light amplification by stimulated emission of radiation
C : Light absorption by stimulated emission of radiation
D : Light absorption by spontaneous emission of radiation
Q.no 51. Reverse bias applied on a junction diode-----------
A : raises the potential barrier
B : decrease the minority carrier current
C : increases the majority carrier current
D : lowers the potential barrier
Q.no 52. Formation of colour in a thin film of oil is due to
A : Interference of light waves
B : Diffraction of light waves
C : Scattering of light rays rays
D : Dispersion of light rays
Q.no 53. In Newton's rings the central spot is
A : Always bright
B : Always dark
C : Can be bright or dark
D : Of blue colour
Q.no 54. Which is the correct relation for forbidden energy gap in conductor, semi-conductor and insulator?
A : ΔEg conductor > ΔEg semiconductor> ΔEginsulator
B : ΔEgconductor > ΔEginsulator > Δ Eg semiconductor
C : ΔEginsulator > Δ Eg semiconductor > ΔEgconductor
D : ΔEg semiconductor > Δ Egconductor > ΔEginsulator
Q.no 55. The points of constructive interference of light are
A : May be bright or dark
B : Always bright
C : Always dark
D : Neighter bight nor dark
Q.no 56. The basic principle of holography is
A : to create the interference pattern of object wave only
B : to create the interference pattern of reference wave only
C : to create the interference pattern of object wave and reference wave
D : none of the above
Q.no 57. Matter waves are associated with
A : Positively charged particles
B : Negatively charged particles
C : Neutral particles
D : All of these
Q.no 58. The concept of wave function is insufficient to tell about probability of particle because
A : Wave function is negative at places of negative amplitude. Thus probability would come out to be negative which is meaningless.
B : Wave function is not single valued
C : Wave function is continuous. Ψ could have been considered as the sufficient function if it had been discontinuous.
D : Wave function directlty gives the uncertainty in position and not the probability.
Q.no 59. Intensity at any point on the screen at angle Ѳ for Fraunhoffer single slit is given by I
A : (n/2)π
B : Im(sinα/α)2
C : sin-1(nλ/a)
D : (sinα/α)2
Q.no 60. Velocity of sound wave is given by
A : v = f/λ
B : v = f.λ
C : v =λ/f
D : v = f/T
Answer for Question No 1. is b
Answer for Question No 2. is d
Answer for Question No 3. is d
Answer for Question No 4. is b
Answer for Question No 5. is d
Answer for Question No 6. is d
Answer for Question No 7. is a
Answer for Question No 8. is a
Answer for Question No 9. is b
Answer for Question No 10. is d
Answer for Question No 11. is a
Answer for Question No 12. is b
Answer for Question No 13. is a
Answer for Question No 14. is c
Answer for Question No 15. is c
Answer for Question No 16. is d
Answer for Question No 17. is d
Answer for Question No 18. is a
Answer for Question No 19. is b
Answer for Question No 20. is b
Answer for Question No 21. is b
Answer for Question No 22. is a
Answer for Question No 23. is d
Answer for Question No 24. is a
Answer for Question No 25. is a
Answer for Question No 26. is a
Answer for Question No 27. is c
Answer for Question No 28. is a
Answer for Question No 29. is b
Answer for Question No 30. is b
Answer for Question No 31. is a
Answer for Question No 32. is a
Answer for Question No 33. is c
Answer for Question No 34. is a
Answer for Question No 35. is a
Answer for Question No 36. is b
Answer for Question No 37. is d
Answer for Question No 38. is c
Answer for Question No 39. is c
Answer for Question No 40. is a
Answer for Question No 41. is c
Answer for Question No 42. is a
Answer for Question No 43. is d
Answer for Question No 44. is a
Answer for Question No 45. is c
Answer for Question No 46. is b
Answer for Question No 47. is b
Answer for Question No 48. is c
Answer for Question No 49. is d
Answer for Question No 50. is b
Answer for Question No 51. is a
Answer for Question No 52. is a
Answer for Question No 53. is b
Answer for Question No 54. is c
Answer for Question No 55. is b
Answer for Question No 56. is c
Answer for Question No 57. is d
Answer for Question No 58. is a
Answer for Question No 59. is b
Answer for Question No 60. is b
Seat No -
Total number of questions : 60
1000499 T1 ENGINEERING PHYSICS
Time : 1hr
Max Marks : 50
N.B
1) All questions are Multiple Choice Questions having single correct option.
2) Attempt any 50 questions out of 60.
3) Use of calculator is allowed.
4) Each question carries 1 Mark.
5) Specially abled students are allowed 20 minutes extra for examination.
6) Do not use pencils to darken answer.
7) Use only black/blue ball point pen to darken the appropriate circle.
8) No change will be allowed once the answer is marked on OMR Sheet.
9) Rough work shall not be done on OMR sheet or on question paper.
10) Darken ONLY ONE CIRCLE for each answer.
Q.no 1. The forbidden energy gap in an insulator is of the order of
A : 1 eV
B : 2 eV
C : 0.1 eV
D : 5 eV
Q.no 2. Nanotechnology is the science of designing,creating and using the materials in which atleast one dimension has a size in the range of
A : 1nm-100nm
B : 0.01nm to 0.1 nm
C : 100 nm- 1000nm
D : 30- 50 nm
Q.no 3. The light source used for optical pumping in Ruby laser is
A : Xenon
B : Argon
C : Neon
D : none of the above
Q.no 4. Quantum mechanically, minimum energy of a particle enclosed in a potential well cannot be
A : 1 eV
B : zero
C : 100 eV
D : 1 KeV
Q.no 5. The phenomenon in which the magnetic line of force are expelled out of the superconducting material at Critical temperature is called.
A : isotopic effect
B : Meissner effect
C : BCS * theory
D : London theory
Q.no 6. The Cooper pairs are electron pairs with
A : equal and same momentum
B : Unequal & same spin
C : Equal and opposite momentum and spin
D : Unequal & opposite spin and momentum
Q.no 7. n type & p type silicon can be obtained by doping pure silicon with
A : Arsenic & Phosphorus
B : Indium & Aluminum
C : Phosphorus & Indium
D : Aluminum & Boron
Q.no 8. In case of ruby laser, optical resonator cavity is formed by the silvered ends of
A : Ruby crystal
B : The Calcium crystal
C : Tourmaline crystal
D : Quartz crystal
Q.no 9. According to the Malu’s law, the intensity of polarized light emerging through the analyzer varies as
A : I =Iₒ cosθ
B : I =Iₒ/cos2θ
C : I =Iₒ / cos²θ
D : I =Iₒ cos²θ
Q.no 10. Reverberation time T of a hall varies is inversely proportional as the
A : density
B : degree of sensation
C : effective area
D : square of amplitude
Q.no 11. At 0 K, intrinsic semiconductor behaves as
A : a perfect conductor
B : a super conductor
C : a semiconductor
D : a perfect insulator
Q.no 12. __________ are used in sunscreen lotions to protect the skin from ultraviolet radiations
A : Zinc oxide and Titanium oxide nanoparticles
B : Talcum stone particles
C : Non-metal nanoparticles
D : Quantum dots
Q.no 13. In Newton’s ring experiment if the air film is replaced by water film, then the diameter of the ring
A : Decreases
B : Increases
C : Remains same
D : None of the above
Q.no 14. Plane polarized light has vibrations
A : In one direction perpendicular to direction of propagation
B : Along the direction of propagation
C : In two directions perpendicular to direction of propagation
D : In all directions perpendicular to direction of propagation
Q.no 15. When two semiconductors of p-type & n-type are brought in contact with each other, the P-N junction formed behaves like
A : an oscillator
B : an amplifier
C : a diode
D : a conductor
Q.no 16. If ne & nh are the number of electrons & holes in a semiconductor heavily doped with phosphorus, then
A : ne»nh
B : ne <nh
C : ne«nh
D : ne =nh
Q.no 17. Depth sounding technique is based on principle of
A : Cavitations
B : navigation
C : reflection
D : echo sounding
Q.no 18. A hologram is most similar to a
A : Dispersion
B : prism
C : 3-D photograph
D : compound lens
Q.no 19. Data storage capacities of hard disks and have led to small and faster microprocessors due to the use of ______________
A : Nanosized electronic components
B : Pure semiconductors
C : Capacitive components
D : Inductive components
Q.no 20. Laser action is possible only if there is
A : a set of reflecting mirrors
B : a black body
C : population inversion
D : oscillations of laser source
Q.no 21. The speed of sound in medium depends upon
A : Amplitude
B : frequency
C : wavelength
D : properties of the medium
Q.no 22. For the Solar cell the ratio of maximum power delivered to ideal power is called as
A : Efficiency
B : Fill factor
C : short-circuit
D : Open-circuit
Q.no 23. Wave function Ψ represents
A : Potential energy of particles producing matter waves
B : Oscillations of quantity that produces matter waves
C : Momentum of particles that produces matter waves
D : Kinetic energy of particles producing matter waves
Q.no 24. Sound waves of frequency less than 20 Hz are called
A : longitudinal wave
B : ultrasonic wave
C : Infrasonic waves
D : mechanical wave
Q.no 25. For the wavefunction to be true or acceptable, the following conditions are to be followed by it
A : Continuous
B : Finite
C : Normalizable
D : All of these
Q.no 26. Depletion layer consists of
A : electrons
B : mobile ions
C : protons.
D : immobile ions
Q.no 27. The current in a superconductor produces
A : zero, voltage drop across it
B : a strong, electric field around it
C : a small voltage drop across it
D : a large voltage drop across it
Q.no 28. The active medium of a helium-neon laser is made up with ________ ratio of helium-neon.
A : 10:1
B : 10:3
C : 10:5
D : 10:6
Q.no 29. Optimum reverberation time for music is
A : 0.5 sec
B : 0.1lsec
C : l.2sec
D : Above 5 sec
Q.no 30. What would be true for wavelengths of De Broglie waves
A : λ (electron) = λ (proton)
B : λ (electron) > λ (proton)
C : λ (electron) < λ (proton)
D : λ (electron) ~ λ (proton)
Q.no 31. Which of the following cannot be polarized?
A : Radio waves
B : Sound waves
C : Light waves
D : X-rays
Q.no 32. We prefer Polaroid sunglasses because they
A : have soothing colours
B : reduce the intensity of light
C : are cheaper
D : can change colour
Q.no 33. The superconducting State is perfectly _ _ _ _ _ in nature.
A : Diamagnetic
B : Paramagnetic
C : Ferromagnetic
D : All above
Q.no 34. The Fermi level in intrinsic semiconductor lies exactly at the of the forbidden band
A : above
B : center
C : below
D : none of these
Q.no 35. LASER is a short form of
A : Light attenuation by stimulated emission of radiation
B : Light amplification by stimulated emission of radiation
C : Light absorption by stimulated emission of radiation
D : Light absorption by spontaneous emission of radiation
Q.no 36. The points of constructive interference of light are
A : May be bright or dark
B : Always bright
C : Always dark
D : Neighter bight nor dark
Q.no 37. For an infinitely deep 1 dimentional potential well, a quantum particle in the ground state is likely to be found
A : at one corner of the well
B : At 1/4th and 3/4th distance from one end of the well
C : At every point in the well with equal probability
D : At the center of the well
Q.no 38. Which is the correct relation for forbidden energy gap in conductor, semi-conductor and insulator?
A : ΔEg conductor > ΔEg semiconductor> ΔEginsulator
B : ΔEgconductor > ΔEginsulator > Δ Eg semiconductor
C : ΔEginsulator > Δ Eg semiconductor > ΔEgconductor
D : ΔEg semiconductor > Δ Egconductor > ΔEginsulator
Q.no 39. The battery connection required to forward bias a p-n junction are
A : +ve terminal to p and —ve terminal to n
B : -ve terminal to p and —ve terminal to n
C : -ve terminal to p and +ve terminal to n
D : none of the above
Q.no 40. Effective path difference between two successive reflected rays by thin parallel film is
A : 2μtcosr+ λ/2
B : 0
C : 2μtcosr
D : 2μtcosr+n λ
Q.no 41. In a semiconductor, current conduction is due to
A : only holes
B : both holes and free electrons
C : only free electrons
D : none of the above
Q.no 42. The normalization condition indicates that probabilities of finding the particle
A : in a small volume summed up over the entire space must give 1
B : in a small volume must give 1
C : in a small volume summed up along the positive direction must give 1
D : in a small volume summed up along the negative direction must give 1
Q.no 43. When the light is incident at the polarizing angle, which of the following is completely polarized?
A : reflected light
B : refracted light
C : both reflected as well as refracted light
D : neither reflected nor refracted light
Q.no 44. The main principle of optical fiber is
A : total internal dispersion
B : total internal reflection
C : total internal refraction
D : none of the above
Q.no 45. Types - l superconductors are ___________ temperature superconductor.
A : low
B : absolute
C : High
D : None of the Above
Q.no 46. The expression for the thickness of a half-wave plate of positive crystal is
A : t = λ / (μe - μo )
B : t = λ / 2(μe - μo )
C : t = λ / 3(μe - μo )
D : t = λ /2 (μo – μe )
Q.no 47. Superconductivity was first observed by
A : Volta
B : Meissner
C : Kamerling Onnes
D : Schrieffer
Q.no 48. If the gap between plano- convex lens and plane glass plate filled with the liquid instead of air then
A : Diameter of rings increases
B : Diameter of rings decreases
C : Diameter of rings does not change
D : All above are correct
Q.no 49. In forward bias, the width of depletion region in a p-n junction diode
A : increases
B : decreases
C : remains constant
D : first (A) then (B)
Q.no 50. Current once initiated in a superconducting ring can continue to flow infinitely without any power losses
Is called
Is called
A : Infinite current
B : Critical current
C : Persistent current
D : induced current
Q.no 51. Laevo-rotatory optically active substance rotates the plane of vibrations
A : In clockwise direction
B : In left hand side
C : By 1800
D : None of the above
Q.no 52. Photovoltaic cells convert light energy into
A : solar energy
B : electrical energy
C : mechanical energy
D : kinetic energy
Q.no 53. Which of the following will remain unchanged when a sound wave travels in air or in water?
A : Amplitude
B : frequency
C : wavelength
D : Speed
Q.no 54. _ _ _ _ _ superconductor is completely diamagnetic
A : Type - l
B : Type - ll
C : both
D : none of the above
Q.no 55. For constructive interference the path difference should be
A : Zero or odd multiple of wavelength
B : Only integral multiple of wavelength
C : 0
D : Zero or integral multiple of wavelength
Q.no 56. The effective path or phase difference between the reflected rays for antirefiection films
A : λ/4 or π/2
B : λ or π/2
C : λ/2 or π
D : 2λor π/2
Q.no 57. Ultrasonic are sound waves having frequency greater than
A : 20 MHz
B : 20 kHz
C : 20GHz
D : 20 Hz
Q.no 58. The name given to the unit of sound absorption is-
A : decibel
B : degree
C : sabine
D : watt
Q.no 59. Schrodinger's equation is required for explaining behavior of subatomic particles because
A : Subatomic particles show wave particle duality
B : Matter wave is associated with subatomic waves
C : Newton's laws of motion cannot be applied to matter waves
D : All options are correct
Q.no 60. Heisenberg Uncertainty Principle is not significant for daily life objects because
A : The value of Planck's constant is insignificant for these particles
B : It is difficult to observe wave particle duality in daily life objects
C : Daily life objects are macroscopic
D : All of these
Answer for Question No 1. is d
Answer for Question No 2. is a
Answer for Question No 3. is a
Answer for Question No 4. is b
Answer for Question No 5. is b
Answer for Question No 6. is c
Answer for Question No 7. is c
Answer for Question No 8. is a
Answer for Question No 9. is d
Answer for Question No 10. is c
Answer for Question No 11. is d
Answer for Question No 12. is a
Answer for Question No 13. is a
Answer for Question No 14. is a
Answer for Question No 15. is c
Answer for Question No 16. is a
Answer for Question No 17. is d
Answer for Question No 18. is c
Answer for Question No 19. is a
Answer for Question No 20. is c
Answer for Question No 21. is d
Answer for Question No 22. is b
Answer for Question No 23. is b
Answer for Question No 24. is c
Answer for Question No 25. is d
Answer for Question No 26. is d
Answer for Question No 27. is a
Answer for Question No 28. is a
Answer for Question No 29. is c
Answer for Question No 30. is b
Answer for Question No 31. is b
Answer for Question No 32. is b
Answer for Question No 33. is a
Answer for Question No 34. is b
Answer for Question No 35. is b
Answer for Question No 36. is b
Answer for Question No 37. is d
Answer for Question No 38. is c
Answer for Question No 39. is a
Answer for Question No 40. is a
Answer for Question No 41. is c
Answer for Question No 42. is a
Answer for Question No 43. is a
Answer for Question No 44. is b
Answer for Question No 45. is a
Answer for Question No 46. is b
Answer for Question No 47. is a
Answer for Question No 48. is b
Answer for Question No 49. is b
Answer for Question No 50. is c
Answer for Question No 51. is b
Answer for Question No 52. is b
Answer for Question No 53. is b
Answer for Question No 54. is a
Answer for Question No 55. is d
Answer for Question No 56. is c
Answer for Question No 57. is b
Answer for Question No 58. is c
Answer for Question No 59. is d
Answer for Question No 60. is d
Seat No -
Total number of questions : 60
1000499 T1 ENGINEERING PHYSICS
Time : 1hr
Max Marks : 50
N.B
1) All questions are Multiple Choice Questions having single correct option.
2) Attempt any 50 questions out of 60.
3) Use of calculator is allowed.
4) Each question carries 1 Mark.
5) Specially abled students are allowed 20 minutes extra for examination.
6) Do not use pencils to darken answer.
7) Use only black/blue ball point pen to darken the appropriate circle.
8) No change will be allowed once the answer is marked on OMR Sheet.
9) Rough work shall not be done on OMR sheet or on question paper.
10) Darken ONLY ONE CIRCLE for each answer.
Q.no 1. Formation of colour in a thin film of oil is due to
A : Interference of light waves
B : Diffraction of light waves
C : Scattering of light rays rays
D : Dispersion of light rays
Q.no 2. When the light is incident at the polarizing angle, which of the following is completely polarized?
A : reflected light
B : refracted light
C : both reflected as well as refracted light
D : neither reflected nor refracted light
Q.no 3. Wave function Ψ represents
A : Potential energy of particles producing matter waves
B : Oscillations of quantity that produces matter waves
C : Momentum of particles that produces matter waves
D : Kinetic energy of particles producing matter waves
Q.no 4. Plane polarized light can be produced by
A : Simple reflection
B : Pile of plates
C : Nicol’s prism
D : All of these
Q.no 5. Superconductivity was first observed by
A : Volta
B : Meissner
C : Kamerling Onnes
D : Schrieffer
Q.no 6. If the material is reduced to nano size then properties of those materials _____________ from those of the bulk material
A : slightly differ
B : drastically differ
C : remain same
D : can’t say
Q.no 7. Matter waves would be more significant for particles having mass
A : About 10 x 103 g
B : About 10 x 10-14 g
C : About 10 x 1014 g
D : About 10 x 10 -28 g
Q.no 8. For an infinitely deep 1 dimentional potential well, a quantum particle in the ground state is likely to be found
A : at one corner of the well
B : At 1/4th and 3/4th distance from one end of the well
C : At every point in the well with equal probability
D : At the center of the well
Q.no 9. Which of the following when added as an impurity into the silicon produces N-type semiconductor?
A : P
B : B
C : Al
D : Mg
Q.no 10. ln Magnetostriction Oscillator
A : a copper rod is used
B : a nickel rod is used
C : a magnesium rod is used
D : an aluminium rod is used
Q.no 11. To check the optical flatness of the surface in wedge-shape thin film fringe-width must be
A : Equal, straight
B : Unequal, straight
C : Unequal, curved
D : Equal, curved
Q.no 12. Quantum mechanically, minimum energy of a particle enclosed in a potential well cannot be
A : 1 eV
B : zero
C : 100 eV
D : 1 KeV
Q.no 13. The light source used for optical pumping in Ruby laser is
A : Xenon
B : Argon
C : Neon
D : none of the above
Q.no 14. The impurity level in an extrinsic semiconductor is about of pure semiconductor
A : 10 atoms for 103 atoms
B : 10 atoms for 102 atoms
C : 1 atoms for 108 atoms
D : 1 atoms for 100 atom
Q.no 15. Plane polarized light has vibrations
A : In one direction perpendicular to direction of propagation
B : Along the direction of propagation
C : In two directions perpendicular to direction of propagation
D : In all directions perpendicular to direction of propagation
Q.no 16. Loudness of sound is found to be proportional to the
A : log 10 L
B : log 10 I
C : area
D : log 10 s
Q.no 17. Which of the following will remain unchanged when a sound wave travels in air or in water?
A : Amplitude
B : frequency
C : wavelength
D : Speed
Q.no 18. The main principle of optical fiber is
A : total internal dispersion
B : total internal reflection
C : total internal refraction
D : none of the above
Q.no 19. The phenomenon in which the magnetic line of force are expelled out of the superconducting material at Critical temperature is called.
A : isotopic effect
B : Meissner effect
C : BCS * theory
D : London theory
Q.no 20. We prefer Polaroid sunglasses because they
A : have soothing colours
B : reduce the intensity of light
C : are cheaper
D : can change colour
Q.no 21. Sound travel in the form of
A : longitudinal
B : transverse
C : mechanical
D : Infrasonic waves
Q.no 22. The temperature at which conductivity of material becomes infinite is called.
A : Critical temperature
B : absolute temperature
C : Mean temperature
D : Crystallization temperature
Q.no 23. According to the Malu’s law, the intensity of polarized light emerging through the analyzer varies as
A : I =Iₒ cosθ
B : I =Iₒ/cos2θ
C : I =Iₒ / cos²θ
D : I =Iₒ cos²θ
Q.no 24. Reverse bias applied on a junction diode-----------
A : raises the potential barrier
B : decrease the minority carrier current
C : increases the majority carrier current
D : lowers the potential barrier
Q.no 25. Current once initiated in a superconducting ring can continue to flow infinitely without any power losses
Is called
Is called
A : Infinite current
B : Critical current
C : Persistent current
D : induced current
Q.no 26. In case of ruby laser, optical resonator cavity is formed by the silvered ends of
A : Ruby crystal
B : The Calcium crystal
C : Tourmaline crystal
D : Quartz crystal
Q.no 27. In Fraunhoffer diffraction distance of slit from source and screen is
A : finite
B : infinite
C : parallel
D : not equal
Q.no 28. Ultrasonic waves are produced by
A : piezoelectric effect
B : Doppler effect
C : Peltier effect
D : magneto-optic effect
Q.no 29. Principal maxima for fraunhoffer single slit diffraction is obtained at ѳ
A : nλ
B : (n/2)π
C : 1
D : 0
Q.no 30. In Newton's rings the central spot is
A : Always bright
B : Always dark
C : Can be bright or dark
D : Of blue colour
Q.no 31. The Cooper pairs are electron pairs with
A : equal and same momentum
B : Unequal & same spin
C : Equal and opposite momentum and spin
D : Unequal & opposite spin and momentum
Q.no 32. The current in a superconductor produces
A : zero, voltage drop across it
B : a strong, electric field around it
C : a small voltage drop across it
D : a large voltage drop across it
Q.no 33. According to de Broglie hypothesis
A : A particle in rest has matter waves associated with it
B : A particle at rest or in motion has matter wave associated with it
C : A particle in motion has matter wave associated with it
D : All above statements are correct
Q.no 34. _ _ _ _ _ superconductor is completely diamagnetic
A : Type - l
B : Type - ll
C : both
D : none of the above
Q.no 35. When a ray is reflected from denser medium, its phase changes by(in radian)
A : 0
B : π
C : 2π
D : 3π
Q.no 36. Intensity of diffraction at an angle ѳ for fraunhoffer diffraction by grating is given by Iѳ
A : (sinNβ/ sinβ)
B : (sinβ)2
C : (sinα/α)2
D : Im(sinα/α)2 (sinNβ/ sinβ)2
Q.no 37. In a narrow wave packet of matter wave
A : The position of the particle cannot be determined accurately
B : The momentum of the particle cannot be determined accurately
C : Concept of wave group does not exist
D : Phase velocity is always zero
Q.no 38. De Broglie wave is expresssed in terms of Ψ. What is Ψ?
A : It is the energy of particles producing matter waves
B : It is the momentum of particles producing matter waves
C : It is the uncertainity in position of particles producing matter waves
D : It represents the oscillations of quantity that produces matter waves.
Q.no 39. The normalization condition indicates that probabilities of finding the particle
A : in a small volume summed up over the entire space must give 1
B : in a small volume must give 1
C : in a small volume summed up along the positive direction must give 1
D : in a small volume summed up along the negative direction must give 1
Q.no 40. When two semiconductors of p-type & n-type are brought in contact with each other, the P-N junction formed behaves like
A : an oscillator
B : an amplifier
C : a diode
D : a conductor
Q.no 41. The active medium of a helium-neon laser is made up with ________ ratio of helium-neon.
A : 10:1
B : 10:3
C : 10:5
D : 10:6
Q.no 42. At the critical temperature and less than critical temperature the resistance of a superconductor.
A : increase rapidly
B : decrease rapidly
C : remains zero
D : increase slowly
Q.no 43. The phenomena of the echo is used to measure the
A : length of metal
B : flaws in metal
C : transfer signals
D : none
Q.no 44. Types - l superconductors are ___________ temperature superconductor.
A : low
B : absolute
C : High
D : None of the Above
Q.no 45. Sound waves of frequency less than 20 Hz are called
A : longitudinal wave
B : ultrasonic wave
C : Infrasonic waves
D : mechanical wave
Q.no 46. Which is the correct relation for forbidden energy gap in conductor, semi-conductor and insulator?
A : ΔEg conductor > ΔEg semiconductor> ΔEginsulator
B : ΔEgconductor > ΔEginsulator > Δ Eg semiconductor
C : ΔEginsulator > Δ Eg semiconductor > ΔEgconductor
D : ΔEg semiconductor > Δ Egconductor > ΔEginsulator
Q.no 47. The points of constructive interference of light are
A : May be bright or dark
B : Always bright
C : Always dark
D : Neighter bight nor dark
Q.no 48. A path difference of 3λ/2 between the two waves corresponds to the phase difference
A : 3π/2
B : π/3
C : 3π
D : 2π/3
Q.no 49. The Fermi level in intrinsic semiconductor lies exactly at the of the forbidden band
A : above
B : center
C : below
D : none of these
Q.no 50. The battery connection required to forward bias a p-n junction are
A : +ve terminal to p and —ve terminal to n
B : -ve terminal to p and —ve terminal to n
C : -ve terminal to p and +ve terminal to n
D : none of the above
Q.no 51. Optimum reverberation time for music is
A : 0.5 sec
B : 0.1lsec
C : l.2sec
D : Above 5 sec
Q.no 52. In the P-type semiconductor, the hole concentration in valence band is----------- than the electron concentration in conduction band.
A : less than
B : greater than
C : equal to
D : all of these
Q.no 53. Bending of light around the straight edge of obstacle and spreading into its geometrical shadow is called as
A : Diffraction
B : Interference
C : Polarization
D : Dispersion
Q.no 54. Data storage capacities of hard disks and have led to small and faster microprocessors due to the use of ______________
A : Nanosized electronic components
B : Pure semiconductors
C : Capacitive components
D : Inductive components
Q.no 55. Effective path difference between two successive reflected rays by thin parallel film is
A : 2μtcosr+ λ/2
B : 0
C : 2μtcosr
D : 2μtcosr+n λ
Q.no 56. Velocity of sound wave is given by
A : v = f/λ
B : v = f.λ
C : v =λ/f
D : v = f/T
Q.no 57. The basic principle of holography is
A : to create the interference pattern of object wave only
B : to create the interference pattern of reference wave only
C : to create the interference pattern of object wave and reference wave
D : none of the above
Q.no 58. Heisenberg Uncertainty Principle is not significant for daily life objects because
A : The value of Planck's constant is insignificant for these particles
B : It is difficult to observe wave particle duality in daily life objects
C : Daily life objects are macroscopic
D : All of these
Q.no 59. The reverberation time is the time required for the intensity to drop by
A : 30dB
B : 90dB
C : C 60dB
D : 120dB
Q.no 60. The concept of wave function is insufficient to tell about probability of particle because
A : Wave function is negative at places of negative amplitude. Thus probability would come out to be negative which is meaningless.
B : Wave function is not single valued
C : Wave function is continuous. Ψ could have been considered as the sufficient function if it had been discontinuous.
D : Wave function directlty gives the uncertainty in position and not the probability.
Answer for Question No 1. is a
Answer for Question No 2. is a
Answer for Question No 3. is b
Answer for Question No 4. is d
Answer for Question No 5. is a
Answer for Question No 6. is b
Answer for Question No 7. is d
Answer for Question No 8. is d
Answer for Question No 9. is a
Answer for Question No 10. is b
Answer for Question No 11. is a
Answer for Question No 12. is b
Answer for Question No 13. is a
Answer for Question No 14. is c
Answer for Question No 15. is a
Answer for Question No 16. is b
Answer for Question No 17. is b
Answer for Question No 18. is b
Answer for Question No 19. is b
Answer for Question No 20. is b
Answer for Question No 21. is a
Answer for Question No 22. is a
Answer for Question No 23. is d
Answer for Question No 24. is a
Answer for Question No 25. is c
Answer for Question No 26. is a
Answer for Question No 27. is b
Answer for Question No 28. is a
Answer for Question No 29. is d
Answer for Question No 30. is b
Answer for Question No 31. is c
Answer for Question No 32. is a
Answer for Question No 33. is c
Answer for Question No 34. is a
Answer for Question No 35. is b
Answer for Question No 36. is d
Answer for Question No 37. is b
Answer for Question No 38. is d
Answer for Question No 39. is a
Answer for Question No 40. is c
Answer for Question No 41. is a
Answer for Question No 42. is c
Answer for Question No 43. is b
Answer for Question No 44. is a
Answer for Question No 45. is c
Answer for Question No 46. is c
Answer for Question No 47. is b
Answer for Question No 48. is c
Answer for Question No 49. is b
Answer for Question No 50. is a
Answer for Question No 51. is c
Answer for Question No 52. is b
Answer for Question No 53. is a
Answer for Question No 54. is a
Answer for Question No 55. is a
Answer for Question No 56. is b
Answer for Question No 57. is c
Answer for Question No 58. is d
Answer for Question No 59. is c
Answer for Question No 60. is a
Seat No -
Total number of questions : 60
1000499 T1 ENGINEERING PHYSICS
Time : 1hr
Max Marks : 50
N.B
1) All questions are Multiple Choice Questions having single correct option.
2) Attempt any 50 questions out of 60.
3) Use of calculator is allowed.
4) Each question carries 1 Mark.
5) Specially abled students are allowed 20 minutes extra for examination.
6) Do not use pencils to darken answer.
7) Use only black/blue ball point pen to darken the appropriate circle.
8) No change will be allowed once the answer is marked on OMR Sheet.
9) Rough work shall not be done on OMR sheet or on question paper.
10) Darken ONLY ONE CIRCLE for each answer.
Q.no 1. The active medium of a helium-neon laser is made up with ________ ratio of helium-neon.
A : 10:1
B : 10:3
C : 10:5
D : 10:6
Q.no 2. Which of the following will remain unchanged when a sound wave travels in air or in water?
A : Amplitude
B : frequency
C : wavelength
D : Speed
Q.no 3. n type & p type silicon can be obtained by doping pure silicon with
A : Arsenic & Phosphorus
B : Indium & Aluminum
C : Phosphorus & Indium
D : Aluminum & Boron
Q.no 4. If the gap between plano- convex lens and plane glass plate filled with the liquid instead of air then
A : Diameter of rings increases
B : Diameter of rings decreases
C : Diameter of rings does not change
D : All above are correct
Q.no 5. What would be true for wavelengths of De Broglie waves
A : λ (electron) = λ (proton)
B : λ (electron) > λ (proton)
C : λ (electron) < λ (proton)
D : λ (electron) ~ λ (proton)
Q.no 6. The Cooper pairs are electron pairs with
A : equal and same momentum
B : Unequal & same spin
C : Equal and opposite momentum and spin
D : Unequal & opposite spin and momentum
Q.no 7. Pumping process used in diode laser is
A : optical pumping
B : forward biased voltage
C : electrical discharge
D : none of these
Q.no 8. The points of constructive interference of light are
A : May be bright or dark
B : Always bright
C : Always dark
D : Neighter bight nor dark
Q.no 9. To check the optical flatness of the surface in wedge-shape thin film fringe-width must be
A : Equal, straight
B : Unequal, straight
C : Unequal, curved
D : Equal, curved
Q.no 10. The speed of sound in medium depends upon
A : Amplitude
B : frequency
C : wavelength
D : properties of the medium
Q.no 11. In a semiconductor, current conduction is due to
A : only holes
B : both holes and free electrons
C : only free electrons
D : none of the above
Q.no 12. Formation of colour in a thin film of oil is due to
A : Interference of light waves
B : Diffraction of light waves
C : Scattering of light rays rays
D : Dispersion of light rays
Q.no 13. In Newton’s ring experiment ,with air as a medium between Plano convex lens and glass plate, diameter of nth dark ring is
A : √4nrλ
B : √4nr
C : √(2n-1)2rλ
D : √4nr/λ
Q.no 14. The Fermi level in intrinsic semiconductor lies exactly at the of the forbidden band
A : above
B : center
C : below
D : none of these
Q.no 15. In a narrow wave packet of matter wave
A : The position of the particle cannot be determined accurately
B : The momentum of the particle cannot be determined accurately
C : Concept of wave group does not exist
D : Phase velocity is always zero
Q.no 16. Current once initiated in a superconducting ring can continue to flow infinitely without any power losses
Is called
Is called
A : Infinite current
B : Critical current
C : Persistent current
D : induced current
Q.no 17. The light source used for optical pumping in Ruby laser is
A : Xenon
B : Argon
C : Neon
D : none of the above
Q.no 18. The phenomenon in which the magnetic line of force are expelled out of the superconducting material at Critical temperature is called.
A : isotopic effect
B : Meissner effect
C : BCS * theory
D : London theory
Q.no 19. Reverberation time T of a hall varies is inversely proportional as the
A : density
B : degree of sensation
C : effective area
D : square of amplitude
Q.no 20. For the Solar cell the ratio of maximum power delivered to ideal power is called as
A : Efficiency
B : Fill factor
C : short-circuit
D : Open-circuit
Q.no 21. Ultrasonic waves are produced by
A : piezoelectric effect
B : Doppler effect
C : Peltier effect
D : magneto-optic effect
Q.no 22. In the Fresnel diffraction the incident wave front is
A : Spherical
B : Cylindrical
C : Spherical or cylindrical
D : Plane
Q.no 23. Laevo-rotatory optically active substance rotates the plane of vibrations
A : In clockwise direction
B : In left hand side
C : By 1800
D : None of the above
Q.no 24. Reverse bias applied on a junction diode-----------
A : raises the potential barrier
B : decrease the minority carrier current
C : increases the majority carrier current
D : lowers the potential barrier
Q.no 25. Fringe width is defined as the distance between two consecutive
A : Crests
B : Bright fringes only
C : Dark fringes only
D : Bright or dark fringes
Q.no 26. Sound travel in the form of
A : longitudinal
B : transverse
C : mechanical
D : Infrasonic waves
Q.no 27. In Newton’s ring experiment if the air film is replaced by water film, then the diameter of the ring
A : Decreases
B : Increases
C : Remains same
D : None of the above
Q.no 28. The normalization condition indicates that probabilities of finding the particle
A : in a small volume summed up over the entire space must give 1
B : in a small volume must give 1
C : in a small volume summed up along the positive direction must give 1
D : in a small volume summed up along the negative direction must give 1
Q.no 29. Which is the correct relation for forbidden energy gap in conductor, semi-conductor and insulator?
A : ΔEg conductor > ΔEg semiconductor> ΔEginsulator
B : ΔEgconductor > ΔEginsulator > Δ Eg semiconductor
C : ΔEginsulator > Δ Eg semiconductor > ΔEgconductor
D : ΔEg semiconductor > Δ Egconductor > ΔEginsulator
Q.no 30. What happens to O-ray and E-ray if they travel along the optic axis?
A : E-ray travels faster than O-ray
B : O-ray travels faster than E-ray
C : Both ray travels with same velocity
D : None of the above
Q.no 31. At the critical temperature and less than critical temperature the resistance of a superconductor.
A : increase rapidly
B : decrease rapidly
C : remains zero
D : increase slowly
Q.no 32. Optimum reverberation time for music is
A : 0.5 sec
B : 0.1lsec
C : l.2sec
D : Above 5 sec
Q.no 33. If ne & nh are the number of electrons & holes in a semiconductor heavily doped with phosphorus, then
A : ne»nh
B : ne <nh
C : ne«nh
D : ne =nh
Q.no 34. _ _ _ _ _ superconductor is completely diamagnetic
A : Type - l
B : Type - ll
C : both
D : none of the above
Q.no 35. In forward bias, the width of depletion region in a p-n junction diode
A : increases
B : decreases
C : remains constant
D : first (A) then (B)
Q.no 36. Sound waves of frequency less than 20 Hz are called
A : longitudinal wave
B : ultrasonic wave
C : Infrasonic waves
D : mechanical wave
Q.no 37. When two semiconductors of p-type & n-type are brought in contact with each other, the P-N junction formed behaves like
A : an oscillator
B : an amplifier
C : a diode
D : a conductor
Q.no 38. Plane polarized light has vibrations
A : In one direction perpendicular to direction of propagation
B : Along the direction of propagation
C : In two directions perpendicular to direction of propagation
D : In all directions perpendicular to direction of propagation
Q.no 39. According to de Broglie hypothesis
A : A particle in rest has matter waves associated with it
B : A particle at rest or in motion has matter wave associated with it
C : A particle in motion has matter wave associated with it
D : All above statements are correct
Q.no 40. We prefer Polaroid sunglasses because they
A : have soothing colours
B : reduce the intensity of light
C : are cheaper
D : can change colour
Q.no 41. In the P-type semiconductor, the hole concentration in valence band is----------- than the electron concentration in conduction band.
A : less than
B : greater than
C : equal to
D : all of these
Q.no 42. Which of the following when added as an impurity into the silicon produces N-type semiconductor?
A : P
B : B
C : Al
D : Mg
Q.no 43. In Fraunhoffer diffraction distance of slit from source and screen is
A : finite
B : infinite
C : parallel
D : not equal
Q.no 44. The walls of the hall built for music concerns should
A : Amplify sound
B : Reflect sound
C : Transmit sound
D : D Absorb sound
Q.no 45. LASER is a short form of
A : Light attenuation by stimulated emission of radiation
B : Light amplification by stimulated emission of radiation
C : Light absorption by stimulated emission of radiation
D : Light absorption by spontaneous emission of radiation
Q.no 46. Intensity of diffraction at an angle ѳ for fraunhoffer diffraction by grating is given by Iѳ
A : (sinNβ/ sinβ)
B : (sinβ)2
C : (sinα/α)2
D : Im(sinα/α)2 (sinNβ/ sinβ)2
Q.no 47. Nanotechnology is the science of designing,creating and using the materials in which atleast one dimension has a size in the range of
A : 1nm-100nm
B : 0.01nm to 0.1 nm
C : 100 nm- 1000nm
D : 30- 50 nm
Q.no 48. According to the Malu’s law, the intensity of polarized light emerging through the analyzer varies as
A : I =Iₒ cosθ
B : I =Iₒ/cos2θ
C : I =Iₒ / cos²θ
D : I =Iₒ cos²θ
Q.no 49. Sound intensity is
A : energy/time
B : wb/m3
C : watt/m2
D : energy/time. area
Q.no 50. The battery connection required to forward bias a p-n junction are
A : +ve terminal to p and —ve terminal to n
B : -ve terminal to p and —ve terminal to n
C : -ve terminal to p and +ve terminal to n
D : none of the above
Q.no 51. Wave function Ψ represents
A : Potential energy of particles producing matter waves
B : Oscillations of quantity that produces matter waves
C : Momentum of particles that produces matter waves
D : Kinetic energy of particles producing matter waves
Q.no 52. Matter waves would be more significant for particles having mass
A : About 10 x 103 g
B : About 10 x 10-14 g
C : About 10 x 1014 g
D : About 10 x 10 -28 g
Q.no 53. De Broglie wave is expresssed in terms of Ψ. What is Ψ?
A : It is the energy of particles producing matter waves
B : It is the momentum of particles producing matter waves
C : It is the uncertainity in position of particles producing matter waves
D : It represents the oscillations of quantity that produces matter waves.
Q.no 54. When a ray is reflected from denser medium, its phase changes by(in radian)
A : 0
B : π
C : 2π
D : 3π
Q.no 55. When the size of the material is reduced to size in nano region, the energy band structure undergo______________which mainly accounts for the change in the properties of nanoparticles
A : Small variations
B : large variations
C : Splitting
D : scattering
Q.no 56. The concept of wave function is insufficient to tell about probability of particle because
A : Wave function is negative at places of negative amplitude. Thus probability would come out to be negative which is meaningless.
B : Wave function is not single valued
C : Wave function is continuous. Ψ could have been considered as the sufficient function if it had been discontinuous.
D : Wave function directlty gives the uncertainty in position and not the probability.
Q.no 57. An echo is heard when direct sound waves coming from the source and its reflected wave reach the listener with a time interval of about
A : 1/14 seconds
B : 1/3 seconds
C : 1/7 seconds
D : 1/19 seconds
Q.no 58. The basic principle of holography is
A : to create the interference pattern of object wave only
B : to create the interference pattern of reference wave only
C : to create the interference pattern of object wave and reference wave
D : none of the above
Q.no 59. Schrodinger's equation is required for explaining behavior of subatomic particles because
A : Subatomic particles show wave particle duality
B : Matter wave is associated with subatomic waves
C : Newton's laws of motion cannot be applied to matter waves
D : All options are correct
Q.no 60. The effective path or phase difference between the reflected rays for antirefiection films
A : λ/4 or π/2
B : λ or π/2
C : λ/2 or π
D : 2λor π/2
Answer for Question No 1. is a
Answer for Question No 2. is b
Answer for Question No 3. is c
Answer for Question No 4. is b
Answer for Question No 5. is b
Answer for Question No 6. is c
Answer for Question No 7. is b
Answer for Question No 8. is b
Answer for Question No 9. is a
Answer for Question No 10. is d
Answer for Question No 11. is c
Answer for Question No 12. is a
Answer for Question No 13. is a
Answer for Question No 14. is b
Answer for Question No 15. is b
Answer for Question No 16. is c
Answer for Question No 17. is a
Answer for Question No 18. is b
Answer for Question No 19. is c
Answer for Question No 20. is b
Answer for Question No 21. is a
Answer for Question No 22. is a
Answer for Question No 23. is b
Answer for Question No 24. is a
Answer for Question No 25. is d
Answer for Question No 26. is a
Answer for Question No 27. is a
Answer for Question No 28. is a
Answer for Question No 29. is c
Answer for Question No 30. is c
Answer for Question No 31. is c
Answer for Question No 32. is c
Answer for Question No 33. is a
Answer for Question No 34. is a
Answer for Question No 35. is b
Answer for Question No 36. is c
Answer for Question No 37. is c
Answer for Question No 38. is a
Answer for Question No 39. is c
Answer for Question No 40. is b
Answer for Question No 41. is b
Answer for Question No 42. is a
Answer for Question No 43. is b
Answer for Question No 44. is d
Answer for Question No 45. is b
Answer for Question No 46. is d
Answer for Question No 47. is a
Answer for Question No 48. is d
Answer for Question No 49. is d
Answer for Question No 50. is a
Answer for Question No 51. is b
Answer for Question No 52. is d
Answer for Question No 53. is d
Answer for Question No 54. is b
Answer for Question No 55. is b
Answer for Question No 56. is a
Answer for Question No 57. is c
Answer for Question No 58. is c
Answer for Question No 59. is d
Answer for Question No 60. is c
Seat No -
Total number of questions : 60
1000499 T1 ENGINEERING PHYSICS
Time : 1hr
Max Marks : 50
N.B
1) All questions are Multiple Choice Questions having single correct option.
2) Attempt any 50 questions out of 60.
3) Use of calculator is allowed.
4) Each question carries 1 Mark.
5) Specially abled students are allowed 20 minutes extra for examination.
6) Do not use pencils to darken answer.
7) Use only black/blue ball point pen to darken the appropriate circle.
8) No change will be allowed once the answer is marked on OMR Sheet.
9) Rough work shall not be done on OMR sheet or on question paper.
10) Darken ONLY ONE CIRCLE for each answer.
Q.no 1. Types - l superconductors are ___________ temperature superconductor.
A : low
B : absolute
C : High
D : None of the Above
Q.no 2. Heisenberg Uncertainty Principle is significant for subatomic particles because
A : Their energy is small
B : They show wave particle duality
C : Their velocity is small
D : They show photoelectric effect
Q.no 3. Principal maxima for fraunhoffer single slit diffraction is obtained at ѳ
A : nλ
B : (n/2)π
C : 1
D : 0
Q.no 4. The intensity of central bright band in the case of diffraction is
A : maximum
B : minimum
C : varies between max to min
D : none of above
Q.no 5. Sound waves of frequency less than 20 Hz are called
A : longitudinal wave
B : ultrasonic wave
C : Infrasonic waves
D : mechanical wave
Q.no 6. When the temperature of n- type semiconductor is increased
A : net negative charge increases
B : minority carriers decreases
C : electron-hole pairs increases
D : none of the above
Q.no 7. The main principle of optical fiber is
A : total internal dispersion
B : total internal reflection
C : total internal refraction
D : none of the above
Q.no 8. The Cooper pairs are electron pairs with
A : equal and same momentum
B : Unequal & same spin
C : Equal and opposite momentum and spin
D : Unequal & opposite spin and momentum
Q.no 9. The forbidden energy gap in an insulator is of the order of
A : 1 eV
B : 2 eV
C : 0.1 eV
D : 5 eV
Q.no 10. Reverberation time T of a hall varies is inversely proportional as the
A : density
B : degree of sensation
C : effective area
D : square of amplitude
Q.no 11. A hologram is most similar to a
A : Dispersion
B : prism
C : 3-D photograph
D : compound lens
Q.no 12. In case of ruby laser, optical resonator cavity is formed by the silvered ends of
A : Ruby crystal
B : The Calcium crystal
C : Tourmaline crystal
D : Quartz crystal
Q.no 13. Formation of colour in a thin film of oil is due to
A : Interference of light waves
B : Diffraction of light waves
C : Scattering of light rays rays
D : Dispersion of light rays
Q.no 14. If the gap between plano- convex lens and plane glass plate filled with the liquid instead of air then
A : Diameter of rings increases
B : Diameter of rings decreases
C : Diameter of rings does not change
D : All above are correct
Q.no 15. When a ray is reflected from denser medium, its phase changes by(in radian)
A : 0
B : π
C : 2π
D : 3π
Q.no 16. Depth sounding technique is based on principle of
A : Cavitations
B : navigation
C : reflection
D : echo sounding
Q.no 17. We prefer Polaroid sunglasses because they
A : have soothing colours
B : reduce the intensity of light
C : are cheaper
D : can change colour
Q.no 18. Plane polarized light can be produced by
A : Simple reflection
B : Pile of plates
C : Nicol’s prism
D : All of these
Q.no 19. Reverse bias applied on a junction diode-----------
A : raises the potential barrier
B : decrease the minority carrier current
C : increases the majority carrier current
D : lowers the potential barrier
Q.no 20. Data storage capacities of hard disks and have led to small and faster microprocessors due to the use of ______________
A : Nanosized electronic components
B : Pure semiconductors
C : Capacitive components
D : Inductive components
Q.no 21. The characteristics of laser beam are
A : Highly directional
B : Highly intense
C : Highly monochromatic
D : All of these
Q.no 22. Quantum mechanically, minimum energy of a particle enclosed in a potential well cannot be
A : 1 eV
B : zero
C : 100 eV
D : 1 KeV
Q.no 23. Laevo-rotatory optically active substance rotates the plane of vibrations
A : In clockwise direction
B : In left hand side
C : By 1800
D : None of the above
Q.no 24. What happens to O-ray and E-ray if they travel along the optic axis?
A : E-ray travels faster than O-ray
B : O-ray travels faster than E-ray
C : Both ray travels with same velocity
D : None of the above
Q.no 25. Laser action is possible only if there is
A : a set of reflecting mirrors
B : a black body
C : population inversion
D : oscillations of laser source
Q.no 26. The Fermi level in intrinsic semiconductor lies exactly at the of the forbidden band
A : above
B : center
C : below
D : none of these
Q.no 27. Depletion layer consists of
A : electrons
B : mobile ions
C : protons.
D : immobile ions
Q.no 28. Wave function Ψ represents
A : Potential energy of particles producing matter waves
B : Oscillations of quantity that produces matter waves
C : Momentum of particles that produces matter waves
D : Kinetic energy of particles producing matter waves
Q.no 29. The impurity level in an extrinsic semiconductor is about of pure semiconductor
A : 10 atoms for 103 atoms
B : 10 atoms for 102 atoms
C : 1 atoms for 108 atoms
D : 1 atoms for 100 atom
Q.no 30. When the size of the material reduces, the surface area to volume ratio ________
A : decreases
B : Increases
C : remains same
D : becomes exactly equal to the volume
Q.no 31. Effective path difference between two successive reflected rays by thin parallel film is
A : 2μtcosr+ λ/2
B : 0
C : 2μtcosr
D : 2μtcosr+n λ
Q.no 32. If ne & nh are the number of electrons & holes in a semiconductor heavily doped with phosphorus, then
A : ne»nh
B : ne <nh
C : ne«nh
D : ne =nh
Q.no 33. piezoelectric effect has been observed in
A : nickel
B : glass
C : quartz
D : mica
Q.no 34. When the light is incident at the polarizing angle, which of the following is completely polarized?
A : reflected light
B : refracted light
C : both reflected as well as refracted light
D : neither reflected nor refracted light
Q.no 35. Sound intensity is
A : energy/time
B : wb/m3
C : watt/m2
D : energy/time. area
Q.no 36. For an infinitely deep 1 dimentional potential well, a quantum particle in the ground state is likely to be found
A : at one corner of the well
B : At 1/4th and 3/4th distance from one end of the well
C : At every point in the well with equal probability
D : At the center of the well
Q.no 37. In Newton’s ring experiment ,with air as a medium between Plano convex lens and glass plate, diameter of nth dark ring is
A : √4nrλ
B : √4nr
C : √(2n-1)2rλ
D : √4nr/λ
Q.no 38. The light source used for optical pumping in Ruby laser is
A : Xenon
B : Argon
C : Neon
D : none of the above
Q.no 39. At the critical temperature and less than critical temperature the resistance of a superconductor.
A : increase rapidly
B : decrease rapidly
C : remains zero
D : increase slowly
Q.no 40. The expression for the thickness of a half-wave plate of positive crystal is
A : t = λ / (μe - μo )
B : t = λ / 2(μe - μo )
C : t = λ / 3(μe - μo )
D : t = λ /2 (μo – μe )
Q.no 41. The points of constructive interference of light are
A : May be bright or dark
B : Always bright
C : Always dark
D : Neighter bight nor dark
Q.no 42. Photovoltaic cells convert light energy into
A : solar energy
B : electrical energy
C : mechanical energy
D : kinetic energy
Q.no 43. Intensity of diffraction at an angle ѳ for fraunhoffer diffraction by grating is given by Iѳ
A : (sinNβ/ sinβ)
B : (sinβ)2
C : (sinα/α)2
D : Im(sinα/α)2 (sinNβ/ sinβ)2
Q.no 44. In Newton’s ring experiment if the air film is replaced by water film, then the diameter of the ring
A : Decreases
B : Increases
C : Remains same
D : None of the above
Q.no 45. In Newton's rings the central spot is
A : Always bright
B : Always dark
C : Can be bright or dark
D : Of blue colour
Q.no 46. The quarter wave plate produces
A : Path difference of λ/4 or phase difference of π /2 radians between O- and E-waves
B : Path difference of λ /2 or phase difference of π /2 radians
C : Path difference of λ /4 or phase difference of π radians
D : None of the above
Q.no 47. ln Magnetostriction Oscillator
A : a copper rod is used
B : a nickel rod is used
C : a magnesium rod is used
D : an aluminium rod is used
Q.no 48. Matter waves would be more significant for particles having mass
A : About 10 x 103 g
B : About 10 x 10-14 g
C : About 10 x 1014 g
D : About 10 x 10 -28 g
Q.no 49. The temperature at which conductivity of material becomes infinite is called.
A : Critical temperature
B : absolute temperature
C : Mean temperature
D : Crystallization temperature
Q.no 50. n type & p type silicon can be obtained by doping pure silicon with
A : Arsenic & Phosphorus
B : Indium & Aluminum
C : Phosphorus & Indium
D : Aluminum & Boron
Q.no 51. Which of the following will remain unchanged when a sound wave travels in air or in water?
A : Amplitude
B : frequency
C : wavelength
D : Speed
Q.no 52. If the material is reduced to nano size then properties of those materials _____________ from those of the bulk material
A : slightly differ
B : drastically differ
C : remain same
D : can’t say
Q.no 53. In the P-type semiconductor, the hole concentration in valence band is----------- than the electron concentration in conduction band.
A : less than
B : greater than
C : equal to
D : all of these
Q.no 54. The normalization condition indicates that probabilities of finding the particle
A : in a small volume summed up over the entire space must give 1
B : in a small volume must give 1
C : in a small volume summed up along the positive direction must give 1
D : in a small volume summed up along the negative direction must give 1
Q.no 55. Ultrasonic waves are produced by
A : piezoelectric effect
B : Doppler effect
C : Peltier effect
D : magneto-optic effect
Q.no 56. Heisenberg Uncertainty Principle is not significant for daily life objects because
A : The value of Planck's constant is insignificant for these particles
B : It is difficult to observe wave particle duality in daily life objects
C : Daily life objects are macroscopic
D : All of these
Q.no 57. The concept of wave function is insufficient to tell about probability of particle because
A : Wave function is negative at places of negative amplitude. Thus probability would come out to be negative which is meaningless.
B : Wave function is not single valued
C : Wave function is continuous. Ψ could have been considered as the sufficient function if it had been discontinuous.
D : Wave function directlty gives the uncertainty in position and not the probability.
Q.no 58. Ultrasonic are sound waves having frequency greater than
A : 20 MHz
B : 20 kHz
C : 20GHz
D : 20 Hz
Q.no 59. Velocity of sound wave is given by
A : v = f/λ
B : v = f.λ
C : v =λ/f
D : v = f/T
Q.no 60. The reverberation time is the time required for the intensity to drop by
A : 30dB
B : 90dB
C : C 60dB
D : 120dB
Answer for Question No 1. is a
Answer for Question No 2. is b
Answer for Question No 3. is d
Answer for Question No 4. is a
Answer for Question No 5. is c
Answer for Question No 6. is c
Answer for Question No 7. is b
Answer for Question No 8. is c
Answer for Question No 9. is d
Answer for Question No 10. is c
Answer for Question No 11. is c
Answer for Question No 12. is a
Answer for Question No 13. is a
Answer for Question No 14. is b
Answer for Question No 15. is b
Answer for Question No 16. is d
Answer for Question No 17. is b
Answer for Question No 18. is d
Answer for Question No 19. is a
Answer for Question No 20. is a
Answer for Question No 21. is d
Answer for Question No 22. is b
Answer for Question No 23. is b
Answer for Question No 24. is c
Answer for Question No 25. is c
Answer for Question No 26. is b
Answer for Question No 27. is d
Answer for Question No 28. is b
Answer for Question No 29. is c
Answer for Question No 30. is b
Answer for Question No 31. is a
Answer for Question No 32. is a
Answer for Question No 33. is c
Answer for Question No 34. is a
Answer for Question No 35. is d
Answer for Question No 36. is d
Answer for Question No 37. is a
Answer for Question No 38. is a
Answer for Question No 39. is c
Answer for Question No 40. is b
Answer for Question No 41. is b
Answer for Question No 42. is b
Answer for Question No 43. is d
Answer for Question No 44. is a
Answer for Question No 45. is b
Answer for Question No 46. is a
Answer for Question No 47. is b
Answer for Question No 48. is d
Answer for Question No 49. is a
Answer for Question No 50. is c
Answer for Question No 51. is b
Answer for Question No 52. is b
Answer for Question No 53. is b
Answer for Question No 54. is a
Answer for Question No 55. is a
Answer for Question No 56. is d
Answer for Question No 57. is a
Answer for Question No 58. is b
Answer for Question No 59. is b
Answer for Question No 60. is c
Seat No -
Total number of questions : 60
1000499 T1 ENGINEERING PHYSICS
Time : 1hr
Max Marks : 50
N.B
1) All questions are Multiple Choice Questions having single correct option.
2) Attempt any 50 questions out of 60.
3) Use of calculator is allowed.
4) Each question carries 1 Mark.
5) Specially abled students are allowed 20 minutes extra for examination.
6) Do not use pencils to darken answer.
7) Use only black/blue ball point pen to darken the appropriate circle.
8) No change will be allowed once the answer is marked on OMR Sheet.
9) Rough work shall not be done on OMR sheet or on question paper.
10) Darken ONLY ONE CIRCLE for each answer.
Q.no 1. When the light is incident at the polarizing angle, which of the following is completely polarized?
A : reflected light
B : refracted light
C : both reflected as well as refracted light
D : neither reflected nor refracted light
Q.no 2. Which of the following when added as an impurity into the silicon produces N-type semiconductor?
A : P
B : B
C : Al
D : Mg
Q.no 3. A hologram is most similar to a
A : Dispersion
B : prism
C : 3-D photograph
D : compound lens
Q.no 4. Nanotechnology is the science of designing,creating and using the materials in which atleast one dimension has a size in the range of
A : 1nm-100nm
B : 0.01nm to 0.1 nm
C : 100 nm- 1000nm
D : 30- 50 nm
Q.no 5. Plane polarized light has vibrations
A : In one direction perpendicular to direction of propagation
B : Along the direction of propagation
C : In two directions perpendicular to direction of propagation
D : In all directions perpendicular to direction of propagation
Q.no 6. The speed of sound in medium depends upon
A : Amplitude
B : frequency
C : wavelength
D : properties of the medium
Q.no 7. De Broglie wave is expresssed in terms of Ψ. What is Ψ?
A : It is the energy of particles producing matter waves
B : It is the momentum of particles producing matter waves
C : It is the uncertainity in position of particles producing matter waves
D : It represents the oscillations of quantity that produces matter waves.
Q.no 8. The normalization condition indicates that probabilities of finding the particle
A : in a small volume summed up over the entire space must give 1
B : in a small volume must give 1
C : in a small volume summed up along the positive direction must give 1
D : in a small volume summed up along the negative direction must give 1
Q.no 9. Fringe width is defined as the distance between two consecutive
A : Crests
B : Bright fringes only
C : Dark fringes only
D : Bright or dark fringes
Q.no 10. For the Solar cell the ratio of maximum power delivered to ideal power is called as
A : Efficiency
B : Fill factor
C : short-circuit
D : Open-circuit
Q.no 11. ln superconductivity, the conductivity of a material becomes.
A : zero
B : finite
C : infinite
D : None of the above
Q.no 12. Superconductivity was first observed by
A : Volta
B : Meissner
C : Kamerling Onnes
D : Schrieffer
Q.no 13. In forward bias, the width of depletion region in a p-n junction diode
A : increases
B : decreases
C : remains constant
D : first (A) then (B)
Q.no 14. In Fraunhoffer diffraction distance of slit from source and screen is
A : finite
B : infinite
C : parallel
D : not equal
Q.no 15. Intensity of diffraction at an angle ѳ for fraunhoffer diffraction by grating is given by Iѳ
A : (sinNβ/ sinβ)
B : (sinβ)2
C : (sinα/α)2
D : Im(sinα/α)2 (sinNβ/ sinβ)2
Q.no 16. Principal maxima for fraunhoffer single slit diffraction is obtained at ѳ
A : nλ
B : (n/2)π
C : 1
D : 0
Q.no 17. In an N-type semiconductor, donor level is
A : above the conduction band of the host
B : close to the conduction band of the host
C : close to the valence band of the host crystal.
D : below to the valence band of the host crystal
Q.no 18. If the gap between plano- convex lens and plane glass plate filled with the liquid instead of air then
A : Diameter of rings increases
B : Diameter of rings decreases
C : Diameter of rings does not change
D : All above are correct
Q.no 19. Laevo-rotatory optically active substance rotates the plane of vibrations
A : In clockwise direction
B : In left hand side
C : By 1800
D : None of the above
Q.no 20. Photovoltaic cells convert light energy into
A : solar energy
B : electrical energy
C : mechanical energy
D : kinetic energy
Q.no 21. n type & p type silicon can be obtained by doping pure silicon with
A : Arsenic & Phosphorus
B : Indium & Aluminum
C : Phosphorus & Indium
D : Aluminum & Boron
Q.no 22. The intensity level expressed in a unit
A : bel
B : 10-12W/m2
C : Newton
D : db/m
Q.no 23. In Newton's rings the central spot is
A : Always bright
B : Always dark
C : Can be bright or dark
D : Of blue colour
Q.no 24. The characteristics of laser beam are
A : Highly directional
B : Highly intense
C : Highly monochromatic
D : All of these
Q.no 25. Which of the following cannot be polarized?
A : Radio waves
B : Sound waves
C : Light waves
D : X-rays
Q.no 26. The Fermi level in intrinsic semiconductor lies exactly at the of the forbidden band
A : above
B : center
C : below
D : none of these
Q.no 27. What would be true for wavelengths of De Broglie waves
A : λ (electron) = λ (proton)
B : λ (electron) > λ (proton)
C : λ (electron) < λ (proton)
D : λ (electron) ~ λ (proton)
Q.no 28. The light source used for optical pumping in Ruby laser is
A : Xenon
B : Argon
C : Neon
D : none of the above
Q.no 29. The current in a superconductor produces
A : zero, voltage drop across it
B : a strong, electric field around it
C : a small voltage drop across it
D : a large voltage drop across it
Q.no 30. If the material is reduced to nano size then properties of those materials _____________ from those of the bulk material
A : slightly differ
B : drastically differ
C : remain same
D : can’t say
Q.no 31. In the Fresnel diffraction the incident wave front is
A : Spherical
B : Cylindrical
C : Spherical or cylindrical
D : Plane
Q.no 32. In the P-type semiconductor, the hole concentration in valence band is----------- than the electron concentration in conduction band.
A : less than
B : greater than
C : equal to
D : all of these
Q.no 33. Effective path difference between two successive reflected rays by thin parallel film is
A : 2μtcosr+ λ/2
B : 0
C : 2μtcosr
D : 2μtcosr+n λ
Q.no 34. Ultrasonic waves are produced by
A : piezoelectric effect
B : Doppler effect
C : Peltier effect
D : magneto-optic effect
Q.no 35. The impurity level in an extrinsic semiconductor is about of pure semiconductor
A : 10 atoms for 103 atoms
B : 10 atoms for 102 atoms
C : 1 atoms for 108 atoms
D : 1 atoms for 100 atom
Q.no 36. For the wavefunction to be true or acceptable, the following conditions are to be followed by it
A : Continuous
B : Finite
C : Normalizable
D : All of these
Q.no 37. Depletion layer consists of
A : electrons
B : mobile ions
C : protons.
D : immobile ions
Q.no 38. In a narrow wave packet of matter wave
A : The position of the particle cannot be determined accurately
B : The momentum of the particle cannot be determined accurately
C : Concept of wave group does not exist
D : Phase velocity is always zero
Q.no 39. Reverse bias applied on a junction diode-----------
A : raises the potential barrier
B : decrease the minority carrier current
C : increases the majority carrier current
D : lowers the potential barrier
Q.no 40. piezoelectric effect has been observed in
A : nickel
B : glass
C : quartz
D : mica
Q.no 41. __________ are used in sunscreen lotions to protect the skin from ultraviolet radiations
A : Zinc oxide and Titanium oxide nanoparticles
B : Talcum stone particles
C : Non-metal nanoparticles
D : Quantum dots
Q.no 42. The superconducting State is perfectly _ _ _ _ _ in nature.
A : Diamagnetic
B : Paramagnetic
C : Ferromagnetic
D : All above
Q.no 43. In Newton’s ring experiment if the air film is replaced by water film, then the diameter of the ring
A : Decreases
B : Increases
C : Remains same
D : None of the above
Q.no 44. Pumping process used in diode laser is
A : optical pumping
B : forward biased voltage
C : electrical discharge
D : none of these
Q.no 45. Current once initiated in a superconducting ring can continue to flow infinitely without any power losses
Is called
Is called
A : Infinite current
B : Critical current
C : Persistent current
D : induced current
Q.no 46. The temperature at which conductivity of material becomes infinite is called.
A : Critical temperature
B : absolute temperature
C : Mean temperature
D : Crystallization temperature
Q.no 47. The quarter wave plate produces
A : Path difference of λ/4 or phase difference of π /2 radians between O- and E-waves
B : Path difference of λ /2 or phase difference of π /2 radians
C : Path difference of λ /4 or phase difference of π radians
D : None of the above
Q.no 48. Sound intensity is
A : energy/time
B : wb/m3
C : watt/m2
D : energy/time. area
Q.no 49. For an infinitely deep 1 dimentional potential well, a quantum particle in the ground state is likely to be found
A : at one corner of the well
B : At 1/4th and 3/4th distance from one end of the well
C : At every point in the well with equal probability
D : At the center of the well
Q.no 50. What happens to O-ray and E-ray if they travel along the optic axis?
A : E-ray travels faster than O-ray
B : O-ray travels faster than E-ray
C : Both ray travels with same velocity
D : None of the above
Q.no 51. When the temperature of n- type semiconductor is increased
A : net negative charge increases
B : minority carriers decreases
C : electron-hole pairs increases
D : none of the above
Q.no 52. The Cooper pairs are electron pairs with
A : equal and same momentum
B : Unequal & same spin
C : Equal and opposite momentum and spin
D : Unequal & opposite spin and momentum
Q.no 53. LASER is a short form of
A : Light attenuation by stimulated emission of radiation
B : Light amplification by stimulated emission of radiation
C : Light absorption by stimulated emission of radiation
D : Light absorption by spontaneous emission of radiation
Q.no 54. Wave function Ψ represents
A : Potential energy of particles producing matter waves
B : Oscillations of quantity that produces matter waves
C : Momentum of particles that produces matter waves
D : Kinetic energy of particles producing matter waves
Q.no 55. According to de Broglie hypothesis
A : A particle in rest has matter waves associated with it
B : A particle at rest or in motion has matter wave associated with it
C : A particle in motion has matter wave associated with it
D : All above statements are correct
Q.no 56. Intensity at any point on the screen at angle Ѳ for Fraunhoffer single slit is given by I
A : (n/2)π
B : Im(sinα/α)2
C : sin-1(nλ/a)
D : (sinα/α)2
Q.no 57. Ultrasonic are sound waves having frequency greater than
A : 20 MHz
B : 20 kHz
C : 20GHz
D : 20 Hz
Q.no 58. Velocity of sound wave is given by
A : v = f/λ
B : v = f.λ
C : v =λ/f
D : v = f/T
Q.no 59. Heisenberg Uncertainty Principle is not significant for daily life objects because
A : The value of Planck's constant is insignificant for these particles
B : It is difficult to observe wave particle duality in daily life objects
C : Daily life objects are macroscopic
D : All of these
Q.no 60. The name given to the unit of sound absorption is-
A : decibel
B : degree
C : sabine
D : watt
Answer for Question No 1. is a
Answer for Question No 2. is a
Answer for Question No 3. is c
Answer for Question No 4. is a
Answer for Question No 5. is a
Answer for Question No 6. is d
Answer for Question No 7. is d
Answer for Question No 8. is a
Answer for Question No 9. is d
Answer for Question No 10. is b
Answer for Question No 11. is c
Answer for Question No 12. is a
Answer for Question No 13. is b
Answer for Question No 14. is b
Answer for Question No 15. is d
Answer for Question No 16. is d
Answer for Question No 17. is b
Answer for Question No 18. is b
Answer for Question No 19. is b
Answer for Question No 20. is b
Answer for Question No 21. is c
Answer for Question No 22. is a
Answer for Question No 23. is b
Answer for Question No 24. is d
Answer for Question No 25. is b
Answer for Question No 26. is b
Answer for Question No 27. is b
Answer for Question No 28. is a
Answer for Question No 29. is a
Answer for Question No 30. is b
Answer for Question No 31. is a
Answer for Question No 32. is b
Answer for Question No 33. is a
Answer for Question No 34. is a
Answer for Question No 35. is c
Answer for Question No 36. is d
Answer for Question No 37. is d
Answer for Question No 38. is b
Answer for Question No 39. is a
Answer for Question No 40. is c
Answer for Question No 41. is a
Answer for Question No 42. is a
Answer for Question No 43. is a
Answer for Question No 44. is b
Answer for Question No 45. is c
Answer for Question No 46. is a
Answer for Question No 47. is a
Answer for Question No 48. is d
Answer for Question No 49. is d
Answer for Question No 50. is c
Answer for Question No 51. is c
Answer for Question No 52. is c
Answer for Question No 53. is b
Answer for Question No 54. is b
Answer for Question No 55. is c
Answer for Question No 56. is b
Answer for Question No 57. is b
Answer for Question No 58. is b
Answer for Question No 59. is d
Answer for Question No 60. is c
Seat No -
Total number of questions : 60
1000499 T1 ENGINEERING PHYSICS
Time : 1hr
Max Marks : 50
N.B
1) All questions are Multiple Choice Questions having single correct option.
2) Attempt any 50 questions out of 60.
3) Use of calculator is allowed.
4) Each question carries 1 Mark.
5) Specially abled students are allowed 20 minutes extra for examination.
6) Do not use pencils to darken answer.
7) Use only black/blue ball point pen to darken the appropriate circle.
8) No change will be allowed once the answer is marked on OMR Sheet.
9) Rough work shall not be done on OMR sheet or on question paper.
10) Darken ONLY ONE CIRCLE for each answer.
Q.no 1. The quarter wave plate produces
A : Path difference of λ/4 or phase difference of π /2 radians between O- and E-waves
B : Path difference of λ /2 or phase difference of π /2 radians
C : Path difference of λ /4 or phase difference of π radians
D : None of the above
Q.no 2. The walls of the hall built for music concerns should
A : Amplify sound
B : Reflect sound
C : Transmit sound
D : D Absorb sound
Q.no 3. Plane polarized light can be produced by
A : Simple reflection
B : Pile of plates
C : Nicol’s prism
D : All of these
Q.no 4. n type & p type silicon can be obtained by doping pure silicon with
A : Arsenic & Phosphorus
B : Indium & Aluminum
C : Phosphorus & Indium
D : Aluminum & Boron
Q.no 5. When the size of the material reduces, the surface area to volume ratio ________
A : decreases
B : Increases
C : remains same
D : becomes exactly equal to the volume
Q.no 6. The forbidden energy gap in an insulator is of the order of
A : 1 eV
B : 2 eV
C : 0.1 eV
D : 5 eV
Q.no 7. __________ are used in sunscreen lotions to protect the skin from ultraviolet radiations
A : Zinc oxide and Titanium oxide nanoparticles
B : Talcum stone particles
C : Non-metal nanoparticles
D : Quantum dots
Q.no 8. The intensity level expressed in a unit
A : bel
B : 10-12W/m2
C : Newton
D : db/m
Q.no 9. According to de Broglie hypothesis equation λ=h/p is applicable for
A : Matter particle only
B : Photons only
C : Both matter particle and photon
D : All options are correct
Q.no 10. The active medium of a helium-neon laser is made up with ________ ratio of helium-neon.
A : 10:1
B : 10:3
C : 10:5
D : 10:6
Q.no 11. The expression for the thickness of a half-wave plate of positive crystal is
A : t = λ / (μe - μo )
B : t = λ / 2(μe - μo )
C : t = λ / 3(μe - μo )
D : t = λ /2 (μo – μe )
Q.no 12. Depletion layer consists of
A : electrons
B : mobile ions
C : protons.
D : immobile ions
Q.no 13. Reverberation time T of a hall varies is inversely proportional as the
A : density
B : degree of sensation
C : effective area
D : square of amplitude
Q.no 14. A path difference of 3λ/2 between the two waves corresponds to the phase difference
A : 3π/2
B : π/3
C : 3π
D : 2π/3
Q.no 15. Principal maxima for fraunhoffer single slit diffraction is obtained at ѳ
A : nλ
B : (n/2)π
C : 1
D : 0
Q.no 16. On reverse biasing the P-N junction,its depletion region becomes
A : narrow
B : zero
C : broad
D : constant
Q.no 17. When a ray is reflected from denser medium, its phase changes by(in radian)
A : 0
B : π
C : 2π
D : 3π
Q.no 18. In the Fresnel diffraction the incident wave front is
A : Spherical
B : Cylindrical
C : Spherical or cylindrical
D : Plane
Q.no 19. Depth sounding technique is based on principle of
A : Cavitations
B : navigation
C : reflection
D : echo sounding
Q.no 20. The phenomena of the echo is used to measure the
A : length of metal
B : flaws in metal
C : transfer signals
D : none
Q.no 21. Bending of light around the straight edge of obstacle and spreading into its geometrical shadow is called as
A : Diffraction
B : Interference
C : Polarization
D : Dispersion
Q.no 22. Optimum reverberation time for music is
A : 0.5 sec
B : 0.1lsec
C : l.2sec
D : Above 5 sec
Q.no 23. ln Magnetostriction Oscillator
A : a copper rod is used
B : a nickel rod is used
C : a magnesium rod is used
D : an aluminium rod is used
Q.no 24. We prefer Polaroid sunglasses because they
A : have soothing colours
B : reduce the intensity of light
C : are cheaper
D : can change colour
Q.no 25. The intensity of central bright band in the case of diffraction is
A : maximum
B : minimum
C : varies between max to min
D : none of above
Q.no 26. At the critical temperature and less than critical temperature the resistance of a superconductor.
A : increase rapidly
B : decrease rapidly
C : remains zero
D : increase slowly
Q.no 27. The points of constructive interference of light are
A : May be bright or dark
B : Always bright
C : Always dark
D : Neighter bight nor dark
Q.no 28. If the gap between plano- convex lens and plane glass plate filled with the liquid instead of air then
A : Diameter of rings increases
B : Diameter of rings decreases
C : Diameter of rings does not change
D : All above are correct
Q.no 29. Photovoltaic cells convert light energy into
A : solar energy
B : electrical energy
C : mechanical energy
D : kinetic energy
Q.no 30. The impurity level in an extrinsic semiconductor is about of pure semiconductor
A : 10 atoms for 103 atoms
B : 10 atoms for 102 atoms
C : 1 atoms for 108 atoms
D : 1 atoms for 100 atom
Q.no 31. Reverse bias applied on a junction diode-----------
A : raises the potential barrier
B : decrease the minority carrier current
C : increases the majority carrier current
D : lowers the potential barrier
Q.no 32. What happens to O-ray and E-ray if they travel along the optic axis?
A : E-ray travels faster than O-ray
B : O-ray travels faster than E-ray
C : Both ray travels with same velocity
D : None of the above
Q.no 33. At 0 K, intrinsic semiconductor behaves as
A : a perfect conductor
B : a super conductor
C : a semiconductor
D : a perfect insulator
Q.no 34. Sound waves of frequency less than 20 Hz are called
A : longitudinal wave
B : ultrasonic wave
C : Infrasonic waves
D : mechanical wave
Q.no 35. Loudness of sound is found to be proportional to the
A : log 10 L
B : log 10 I
C : area
D : log 10 s
Q.no 36. The battery connection required to forward bias a p-n junction are
A : +ve terminal to p and —ve terminal to n
B : -ve terminal to p and —ve terminal to n
C : -ve terminal to p and +ve terminal to n
D : none of the above
Q.no 37. Intensity of diffraction at an angle ѳ for fraunhoffer diffraction by grating is given by Iѳ
A : (sinNβ/ sinβ)
B : (sinβ)2
C : (sinα/α)2
D : Im(sinα/α)2 (sinNβ/ sinβ)2
Q.no 38. When the temperature of n- type semiconductor is increased
A : net negative charge increases
B : minority carriers decreases
C : electron-hole pairs increases
D : none of the above
Q.no 39. A hologram is most similar to a
A : Dispersion
B : prism
C : 3-D photograph
D : compound lens
Q.no 40. In an N-type semiconductor, donor level is
A : above the conduction band of the host
B : close to the conduction band of the host
C : close to the valence band of the host crystal.
D : below to the valence band of the host crystal
Q.no 41. In forward bias, the width of depletion region in a p-n junction diode
A : increases
B : decreases
C : remains constant
D : first (A) then (B)
Q.no 42. When the size of the material is reduced to size in nano region, the energy band structure undergo______________which mainly accounts for the change in the properties of nanoparticles
A : Small variations
B : large variations
C : Splitting
D : scattering
Q.no 43. Current once initiated in a superconducting ring can continue to flow infinitely without any power losses
Is called
Is called
A : Infinite current
B : Critical current
C : Persistent current
D : induced current
Q.no 44. The Fermi level in intrinsic semiconductor lies exactly at the of the forbidden band
A : above
B : center
C : below
D : none of these
Q.no 45. When two semiconductors of p-type & n-type are brought in contact with each other, the P-N junction formed behaves like
A : an oscillator
B : an amplifier
C : a diode
D : a conductor
Q.no 46. _________ superconductors are also called soft superconductors
A : Type I
B : Type II
C : Type III
D : Type IV
Q.no 47. Which of the following when added as an impurity into the silicon produces N-type semiconductor?
A : P
B : B
C : Al
D : Mg
Q.no 48. The minimum amount of current passed through the body of superconducter in order of destroy the superconductivity is called.
A : induced current
B : Critical current
C : Eddy current
D : super current
Q.no 49. For the Solar cell the ratio of maximum power delivered to ideal power is called as
A : Efficiency
B : Fill factor
C : short-circuit
D : Open-circuit
Q.no 50. The main principle of optical fiber is
A : total internal dispersion
B : total internal reflection
C : total internal refraction
D : none of the above
Q.no 51. If the material is reduced to nano size then properties of those materials _____________ from those of the bulk material
A : slightly differ
B : drastically differ
C : remain same
D : can’t say
Q.no 52. Fringe width is defined as the distance between two consecutive
A : Crests
B : Bright fringes only
C : Dark fringes only
D : Bright or dark fringes
Q.no 53. De Broglie wave is expresssed in terms of Ψ. What is Ψ?
A : It is the energy of particles producing matter waves
B : It is the momentum of particles producing matter waves
C : It is the uncertainity in position of particles producing matter waves
D : It represents the oscillations of quantity that produces matter waves.
Q.no 54. Matter waves would be more significant for particles having mass
A : About 10 x 103 g
B : About 10 x 10-14 g
C : About 10 x 1014 g
D : About 10 x 10 -28 g
Q.no 55. In case of ruby laser, optical resonator cavity is formed by the silvered ends of
A : Ruby crystal
B : The Calcium crystal
C : Tourmaline crystal
D : Quartz crystal
Q.no 56. Ultrasonic are sound waves having frequency greater than
A : 20 MHz
B : 20 kHz
C : 20GHz
D : 20 Hz
Q.no 57. Intensity at any point on the screen at angle Ѳ for Fraunhoffer single slit is given by I
A : (n/2)π
B : Im(sinα/α)2
C : sin-1(nλ/a)
D : (sinα/α)2
Q.no 58. Matter waves are associated with
A : Positively charged particles
B : Negatively charged particles
C : Neutral particles
D : All of these
Q.no 59. Velocity of sound wave is given by
A : v = f/λ
B : v = f.λ
C : v =λ/f
D : v = f/T
Q.no 60. The basic principle of holography is
A : to create the interference pattern of object wave only
B : to create the interference pattern of reference wave only
C : to create the interference pattern of object wave and reference wave
D : none of the above
Answer for Question No 1. is a
Answer for Question No 2. is d
Answer for Question No 3. is d
Answer for Question No 4. is c
Answer for Question No 5. is b
Answer for Question No 6. is d
Answer for Question No 7. is a
Answer for Question No 8. is a
Answer for Question No 9. is c
Answer for Question No 10. is a
Answer for Question No 11. is b
Answer for Question No 12. is d
Answer for Question No 13. is c
Answer for Question No 14. is c
Answer for Question No 15. is d
Answer for Question No 16. is c
Answer for Question No 17. is b
Answer for Question No 18. is a
Answer for Question No 19. is d
Answer for Question No 20. is b
Answer for Question No 21. is a
Answer for Question No 22. is c
Answer for Question No 23. is b
Answer for Question No 24. is b
Answer for Question No 25. is a
Answer for Question No 26. is c
Answer for Question No 27. is b
Answer for Question No 28. is b
Answer for Question No 29. is b
Answer for Question No 30. is c
Answer for Question No 31. is a
Answer for Question No 32. is c
Answer for Question No 33. is d
Answer for Question No 34. is c
Answer for Question No 35. is b
Answer for Question No 36. is a
Answer for Question No 37. is d
Answer for Question No 38. is c
Answer for Question No 39. is c
Answer for Question No 40. is b
Answer for Question No 41. is b
Answer for Question No 42. is b
Answer for Question No 43. is c
Answer for Question No 44. is b
Answer for Question No 45. is c
Answer for Question No 46. is a
Answer for Question No 47. is a
Answer for Question No 48. is b
Answer for Question No 49. is b
Answer for Question No 50. is b
Answer for Question No 51. is b
Answer for Question No 52. is d
Answer for Question No 53. is d
Answer for Question No 54. is d
Answer for Question No 55. is a
Answer for Question No 56. is b
Answer for Question No 57. is b
Answer for Question No 58. is d
Answer for Question No 59. is b
Answer for Question No 60. is c
Seat No -
Total number of questions : 60
1000499 T1 ENGINEERING PHYSICS
Time : 1hr
Max Marks : 50
N.B
1) All questions are Multiple Choice Questions having single correct option.
2) Attempt any 50 questions out of 60.
3) Use of calculator is allowed.
4) Each question carries 1 Mark.
5) Specially abled students are allowed 20 minutes extra for examination.
6) Do not use pencils to darken answer.
7) Use only black/blue ball point pen to darken the appropriate circle.
8) No change will be allowed once the answer is marked on OMR Sheet.
9) Rough work shall not be done on OMR sheet or on question paper.
10) Darken ONLY ONE CIRCLE for each answer.
Q.no 1. Fringe width is defined as the distance between two consecutive
A : Crests
B : Bright fringes only
C : Dark fringes only
D : Bright or dark fringes
Q.no 2. The current in a superconductor produces
A : zero, voltage drop across it
B : a strong, electric field around it
C : a small voltage drop across it
D : a large voltage drop across it
Q.no 3. Data storage capacities of hard disks and have led to small and faster microprocessors due to the use of ______________
A : Nanosized electronic components
B : Pure semiconductors
C : Capacitive components
D : Inductive components
Q.no 4. Bending of light around the straight edge of obstacle and spreading into its geometrical shadow is called as
A : Diffraction
B : Interference
C : Polarization
D : Dispersion
Q.no 5. What happens to O-ray and E-ray if they travel along the optic axis?
A : E-ray travels faster than O-ray
B : O-ray travels faster than E-ray
C : Both ray travels with same velocity
D : None of the above
Q.no 6. Photovoltaic cells convert light energy into
A : solar energy
B : electrical energy
C : mechanical energy
D : kinetic energy
Q.no 7. ln superconductivity, the conductivity of a material becomes.
A : zero
B : finite
C : infinite
D : None of the above
Q.no 8. Depth sounding technique is based on principle of
A : Cavitations
B : navigation
C : reflection
D : echo sounding
Q.no 9. Heisenberg Uncertainty Principle is significant for subatomic particles because
A : Their energy is small
B : They show wave particle duality
C : Their velocity is small
D : They show photoelectric effect
Q.no 10. Nanotechnology is the science of designing,creating and using the materials in which atleast one dimension has a size in the range of
A : 1nm-100nm
B : 0.01nm to 0.1 nm
C : 100 nm- 1000nm
D : 30- 50 nm
Q.no 11. Ultrasonic waves are produced by
A : piezoelectric effect
B : Doppler effect
C : Peltier effect
D : magneto-optic effect
Q.no 12. In Newton's rings the central spot is
A : Always bright
B : Always dark
C : Can be bright or dark
D : Of blue colour
Q.no 13. The battery connection required to forward bias a p-n junction are
A : +ve terminal to p and —ve terminal to n
B : -ve terminal to p and —ve terminal to n
C : -ve terminal to p and +ve terminal to n
D : none of the above
Q.no 14. Formation of colour in a thin film of oil is due to
A : Interference of light waves
B : Diffraction of light waves
C : Scattering of light rays rays
D : Dispersion of light rays
Q.no 15. Which of the following cannot be polarized?
A : Radio waves
B : Sound waves
C : Light waves
D : X-rays
Q.no 16. What would be true for wavelengths of De Broglie waves
A : λ (electron) = λ (proton)
B : λ (electron) > λ (proton)
C : λ (electron) < λ (proton)
D : λ (electron) ~ λ (proton)
Q.no 17. Reverse bias applied on a junction diode-----------
A : raises the potential barrier
B : decrease the minority carrier current
C : increases the majority carrier current
D : lowers the potential barrier
Q.no 18. In Fraunhoffer diffraction distance of slit from source and screen is
A : finite
B : infinite
C : parallel
D : not equal
Q.no 19. ln Magnetostriction Oscillator
A : a copper rod is used
B : a nickel rod is used
C : a magnesium rod is used
D : an aluminium rod is used
Q.no 20. Plane polarized light has vibrations
A : In one direction perpendicular to direction of propagation
B : Along the direction of propagation
C : In two directions perpendicular to direction of propagation
D : In all directions perpendicular to direction of propagation
Q.no 21. Principal maxima for fraunhoffer single slit diffraction is obtained at ѳ
A : nλ
B : (n/2)π
C : 1
D : 0
Q.no 22. _ _ _ _ _ superconductor is completely diamagnetic
A : Type - l
B : Type - ll
C : both
D : none of the above
Q.no 23. Loudness of sound is found to be proportional to the
A : log 10 L
B : log 10 I
C : area
D : log 10 s
Q.no 24. Intensity of diffraction at an angle ѳ for fraunhoffer diffraction by grating is given by Iѳ
A : (sinNβ/ sinβ)
B : (sinβ)2
C : (sinα/α)2
D : Im(sinα/α)2 (sinNβ/ sinβ)2
Q.no 25. According to de Broglie hypothesis equation λ=h/p is applicable for
A : Matter particle only
B : Photons only
C : Both matter particle and photon
D : All options are correct
Q.no 26. If ne & nh are the number of electrons & holes in a semiconductor heavily doped with phosphorus, then
A : ne»nh
B : ne <nh
C : ne«nh
D : ne =nh
Q.no 27. The characteristics of laser beam are
A : Highly directional
B : Highly intense
C : Highly monochromatic
D : All of these
Q.no 28. At the critical temperature and less than critical temperature the resistance of a superconductor.
A : increase rapidly
B : decrease rapidly
C : remains zero
D : increase slowly
Q.no 29. For constructive interference the path difference should be
A : Zero or odd multiple of wavelength
B : Only integral multiple of wavelength
C : 0
D : Zero or integral multiple of wavelength
Q.no 30. The Fermi level in intrinsic semiconductor lies exactly at the of the forbidden band
A : above
B : center
C : below
D : none of these
Q.no 31. In forward bias, the width of depletion region in a p-n junction diode
A : increases
B : decreases
C : remains constant
D : first (A) then (B)
Q.no 32. In case of ruby laser, optical resonator cavity is formed by the silvered ends of
A : Ruby crystal
B : The Calcium crystal
C : Tourmaline crystal
D : Quartz crystal
Q.no 33. Effective path difference between two successive reflected rays by thin parallel film is
A : 2μtcosr+ λ/2
B : 0
C : 2μtcosr
D : 2μtcosr+n λ
Q.no 34. Reverberation time T of a hall varies is inversely proportional as the
A : density
B : degree of sensation
C : effective area
D : square of amplitude
Q.no 35. When a ray is reflected from denser medium, its phase changes by(in radian)
A : 0
B : π
C : 2π
D : 3π
Q.no 36. The phenomena of the echo is used to measure the
A : length of metal
B : flaws in metal
C : transfer signals
D : none
Q.no 37. The walls of the hall built for music concerns should
A : Amplify sound
B : Reflect sound
C : Transmit sound
D : D Absorb sound
Q.no 38. The intensity level expressed in a unit
A : bel
B : 10-12W/m2
C : Newton
D : db/m
Q.no 39. LASER is a short form of
A : Light attenuation by stimulated emission of radiation
B : Light amplification by stimulated emission of radiation
C : Light absorption by stimulated emission of radiation
D : Light absorption by spontaneous emission of radiation
Q.no 40. Which is the correct relation for forbidden energy gap in conductor, semi-conductor and insulator?
A : ΔEg conductor > ΔEg semiconductor> ΔEginsulator
B : ΔEgconductor > ΔEginsulator > Δ Eg semiconductor
C : ΔEginsulator > Δ Eg semiconductor > ΔEgconductor
D : ΔEg semiconductor > Δ Egconductor > ΔEginsulator
Q.no 41. n type & p type silicon can be obtained by doping pure silicon with
A : Arsenic & Phosphorus
B : Indium & Aluminum
C : Phosphorus & Indium
D : Aluminum & Boron
Q.no 42. The light source used for optical pumping in Ruby laser is
A : Xenon
B : Argon
C : Neon
D : none of the above
Q.no 43. Which of the following will remain unchanged when a sound wave travels in air or in water?
A : Amplitude
B : frequency
C : wavelength
D : Speed
Q.no 44. _________ superconductors are also called soft superconductors
A : Type I
B : Type II
C : Type III
D : Type IV
Q.no 45. When the temperature of n- type semiconductor is increased
A : net negative charge increases
B : minority carriers decreases
C : electron-hole pairs increases
D : none of the above
Q.no 46. The Cooper pairs are electron pairs with
A : equal and same momentum
B : Unequal & same spin
C : Equal and opposite momentum and spin
D : Unequal & opposite spin and momentum
Q.no 47. A path difference of 3λ/2 between the two waves corresponds to the phase difference
A : 3π/2
B : π/3
C : 3π
D : 2π/3
Q.no 48. The temperature at which conductivity of material becomes infinite is called.
A : Critical temperature
B : absolute temperature
C : Mean temperature
D : Crystallization temperature
Q.no 49. In a narrow wave packet of matter wave
A : The position of the particle cannot be determined accurately
B : The momentum of the particle cannot be determined accurately
C : Concept of wave group does not exist
D : Phase velocity is always zero
Q.no 50. Sound intensity is
A : energy/time
B : wb/m3
C : watt/m2
D : energy/time. area
Q.no 51. We prefer Polaroid sunglasses because they
A : have soothing colours
B : reduce the intensity of light
C : are cheaper
D : can change colour
Q.no 52. At 0 K, intrinsic semiconductor behaves as
A : a perfect conductor
B : a super conductor
C : a semiconductor
D : a perfect insulator
Q.no 53. In Newton’s ring experiment ,with air as a medium between Plano convex lens and glass plate, diameter of nth dark ring is
A : √4nrλ
B : √4nr
C : √(2n-1)2rλ
D : √4nr/λ
Q.no 54. Plane polarized light can be produced by
A : Simple reflection
B : Pile of plates
C : Nicol’s prism
D : All of these
Q.no 55. Superconductivity was first observed by
A : Volta
B : Meissner
C : Kamerling Onnes
D : Schrieffer
Q.no 56. Heisenberg Uncertainty Principle is not significant for daily life objects because
A : The value of Planck's constant is insignificant for these particles
B : It is difficult to observe wave particle duality in daily life objects
C : Daily life objects are macroscopic
D : All of these
Q.no 57. The concept of wave function is insufficient to tell about probability of particle because
A : Wave function is negative at places of negative amplitude. Thus probability would come out to be negative which is meaningless.
B : Wave function is not single valued
C : Wave function is continuous. Ψ could have been considered as the sufficient function if it had been discontinuous.
D : Wave function directlty gives the uncertainty in position and not the probability.
Q.no 58. An echo is heard when direct sound waves coming from the source and its reflected wave reach the listener with a time interval of about
A : 1/14 seconds
B : 1/3 seconds
C : 1/7 seconds
D : 1/19 seconds
Q.no 59. Matter waves are associated with
A : Positively charged particles
B : Negatively charged particles
C : Neutral particles
D : All of these
Q.no 60. The reverberation time is the time required for the intensity to drop by
A : 30dB
B : 90dB
C : C 60dB
D : 120dB
Answer for Question No 1. is d
Answer for Question No 2. is a
Answer for Question No 3. is a
Answer for Question No 4. is a
Answer for Question No 5. is c
Answer for Question No 6. is b
Answer for Question No 7. is c
Answer for Question No 8. is d
Answer for Question No 9. is b
Answer for Question No 10. is a
Answer for Question No 11. is a
Answer for Question No 12. is b
Answer for Question No 13. is a
Answer for Question No 14. is a
Answer for Question No 15. is b
Answer for Question No 16. is b
Answer for Question No 17. is a
Answer for Question No 18. is b
Answer for Question No 19. is b
Answer for Question No 20. is a
Answer for Question No 21. is d
Answer for Question No 22. is a
Answer for Question No 23. is b
Answer for Question No 24. is d
Answer for Question No 25. is c
Answer for Question No 26. is a
Answer for Question No 27. is d
Answer for Question No 28. is c
Answer for Question No 29. is d
Answer for Question No 30. is b
Answer for Question No 31. is b
Answer for Question No 32. is a
Answer for Question No 33. is a
Answer for Question No 34. is c
Answer for Question No 35. is b
Answer for Question No 36. is b
Answer for Question No 37. is d
Answer for Question No 38. is a
Answer for Question No 39. is b
Answer for Question No 40. is c
Answer for Question No 41. is c
Answer for Question No 42. is a
Answer for Question No 43. is b
Answer for Question No 44. is a
Answer for Question No 45. is c
Answer for Question No 46. is c
Answer for Question No 47. is c
Answer for Question No 48. is a
Answer for Question No 49. is b
Answer for Question No 50. is d
Answer for Question No 51. is b
Answer for Question No 52. is d
Answer for Question No 53. is a
Answer for Question No 54. is d
Answer for Question No 55. is a
Answer for Question No 56. is d
Answer for Question No 57. is a
Answer for Question No 58. is c
Answer for Question No 59. is d
Answer for Question No 60. is c
Seat No -
Total number of questions : 60
1000499 T1 ENGINEERING PHYSICS
Time : 1hr
Max Marks : 50
N.B
1) All questions are Multiple Choice Questions having single correct option.
2) Attempt any 50 questions out of 60.
3) Use of calculator is allowed.
4) Each question carries 1 Mark.
5) Specially abled students are allowed 20 minutes extra for examination.
6) Do not use pencils to darken answer.
7) Use only black/blue ball point pen to darken the appropriate circle.
8) No change will be allowed once the answer is marked on OMR Sheet.
9) Rough work shall not be done on OMR sheet or on question paper.
10) Darken ONLY ONE CIRCLE for each answer.
Q.no 1. According to de Broglie hypothesis
A : A particle in rest has matter waves associated with it
B : A particle at rest or in motion has matter wave associated with it
C : A particle in motion has matter wave associated with it
D : All above statements are correct
Q.no 2. The characteristics of laser beam are
A : Highly directional
B : Highly intense
C : Highly monochromatic
D : All of these
Q.no 3. Which is the correct relation for forbidden energy gap in conductor, semi-conductor and insulator?
A : ΔEg conductor > ΔEg semiconductor> ΔEginsulator
B : ΔEgconductor > ΔEginsulator > Δ Eg semiconductor
C : ΔEginsulator > Δ Eg semiconductor > ΔEgconductor
D : ΔEg semiconductor > Δ Egconductor > ΔEginsulator
Q.no 4. In an N-type semiconductor, donor level is
A : above the conduction band of the host
B : close to the conduction band of the host
C : close to the valence band of the host crystal.
D : below to the valence band of the host crystal
Q.no 5. A hologram is most similar to a
A : Dispersion
B : prism
C : 3-D photograph
D : compound lens
Q.no 6. The walls of the hall built for music concerns should
A : Amplify sound
B : Reflect sound
C : Transmit sound
D : D Absorb sound
Q.no 7. We prefer Polaroid sunglasses because they
A : have soothing colours
B : reduce the intensity of light
C : are cheaper
D : can change colour
Q.no 8. De Broglie wave is expresssed in terms of Ψ. What is Ψ?
A : It is the energy of particles producing matter waves
B : It is the momentum of particles producing matter waves
C : It is the uncertainity in position of particles producing matter waves
D : It represents the oscillations of quantity that produces matter waves.
Q.no 9. Effective path difference between two successive reflected rays by thin parallel film is
A : 2μtcosr+ λ/2
B : 0
C : 2μtcosr
D : 2μtcosr+n λ
Q.no 10. Reverse bias applied on a junction diode-----------
A : raises the potential barrier
B : decrease the minority carrier current
C : increases the majority carrier current
D : lowers the potential barrier
Q.no 11. The Cooper pairs are electron pairs with
A : equal and same momentum
B : Unequal & same spin
C : Equal and opposite momentum and spin
D : Unequal & opposite spin and momentum
Q.no 12. Formation of colour in a thin film of oil is due to
A : Interference of light waves
B : Diffraction of light waves
C : Scattering of light rays rays
D : Dispersion of light rays
Q.no 13. _________ superconductors are also called soft superconductors
A : Type I
B : Type II
C : Type III
D : Type IV
Q.no 14. A path difference of 3λ/2 between the two waves corresponds to the phase difference
A : 3π/2
B : π/3
C : 3π
D : 2π/3
Q.no 15. If the gap between plano- convex lens and plane glass plate filled with the liquid instead of air then
A : Diameter of rings increases
B : Diameter of rings decreases
C : Diameter of rings does not change
D : All above are correct
Q.no 16. Current once initiated in a superconducting ring can continue to flow infinitely without any power losses
Is called
Is called
A : Infinite current
B : Critical current
C : Persistent current
D : induced current
Q.no 17. Intensity of diffraction at an angle ѳ for fraunhoffer diffraction by grating is given by Iѳ
A : (sinNβ/ sinβ)
B : (sinβ)2
C : (sinα/α)2
D : Im(sinα/α)2 (sinNβ/ sinβ)2
Q.no 18. What happens to O-ray and E-ray if they travel along the optic axis?
A : E-ray travels faster than O-ray
B : O-ray travels faster than E-ray
C : Both ray travels with same velocity
D : None of the above
Q.no 19. In Newton's rings the central spot is
A : Always bright
B : Always dark
C : Can be bright or dark
D : Of blue colour
Q.no 20. Depletion layer consists of
A : electrons
B : mobile ions
C : protons.
D : immobile ions
Q.no 21. The quarter wave plate produces
A : Path difference of λ/4 or phase difference of π /2 radians between O- and E-waves
B : Path difference of λ /2 or phase difference of π /2 radians
C : Path difference of λ /4 or phase difference of π radians
D : None of the above
Q.no 22. Matter waves would be more significant for particles having mass
A : About 10 x 103 g
B : About 10 x 10-14 g
C : About 10 x 1014 g
D : About 10 x 10 -28 g
Q.no 23. In forward bias, the width of depletion region in a p-n junction diode
A : increases
B : decreases
C : remains constant
D : first (A) then (B)
Q.no 24. Which of the following when added as an impurity into the silicon produces N-type semiconductor?
A : P
B : B
C : Al
D : Mg
Q.no 25. According to the Malu’s law, the intensity of polarized light emerging through the analyzer varies as
A : I =Iₒ cosθ
B : I =Iₒ/cos2θ
C : I =Iₒ / cos²θ
D : I =Iₒ cos²θ
Q.no 26. Nanotechnology is the science of designing,creating and using the materials in which atleast one dimension has a size in the range of
A : 1nm-100nm
B : 0.01nm to 0.1 nm
C : 100 nm- 1000nm
D : 30- 50 nm
Q.no 27. In case of ruby laser, optical resonator cavity is formed by the silvered ends of
A : Ruby crystal
B : The Calcium crystal
C : Tourmaline crystal
D : Quartz crystal
Q.no 28. When the light is incident at the polarizing angle, which of the following is completely polarized?
A : reflected light
B : refracted light
C : both reflected as well as refracted light
D : neither reflected nor refracted light
Q.no 29. In Newton’s ring experiment if the air film is replaced by water film, then the diameter of the ring
A : Decreases
B : Increases
C : Remains same
D : None of the above
Q.no 30. Laevo-rotatory optically active substance rotates the plane of vibrations
A : In clockwise direction
B : In left hand side
C : By 1800
D : None of the above
Q.no 31. Types - l superconductors are ___________ temperature superconductor.
A : low
B : absolute
C : High
D : None of the Above
Q.no 32. __________ are used in sunscreen lotions to protect the skin from ultraviolet radiations
A : Zinc oxide and Titanium oxide nanoparticles
B : Talcum stone particles
C : Non-metal nanoparticles
D : Quantum dots
Q.no 33. The current in a superconductor produces
A : zero, voltage drop across it
B : a strong, electric field around it
C : a small voltage drop across it
D : a large voltage drop across it
Q.no 34. Laser action is possible only if there is
A : a set of reflecting mirrors
B : a black body
C : population inversion
D : oscillations of laser source
Q.no 35. The expression for the thickness of a half-wave plate of positive crystal is
A : t = λ / (μe - μo )
B : t = λ / 2(μe - μo )
C : t = λ / 3(μe - μo )
D : t = λ /2 (μo – μe )
Q.no 36. The Fermi level in intrinsic semiconductor lies exactly at the of the forbidden band
A : above
B : center
C : below
D : none of these
Q.no 37. The light source used for optical pumping in Ruby laser is
A : Xenon
B : Argon
C : Neon
D : none of the above
Q.no 38. Loudness of sound is found to be proportional to the
A : log 10 L
B : log 10 I
C : area
D : log 10 s
Q.no 39. The impurity level in an extrinsic semiconductor is about of pure semiconductor
A : 10 atoms for 103 atoms
B : 10 atoms for 102 atoms
C : 1 atoms for 108 atoms
D : 1 atoms for 100 atom
Q.no 40. In the Fresnel diffraction the incident wave front is
A : Spherical
B : Cylindrical
C : Spherical or cylindrical
D : Plane
Q.no 41. Sound waves of frequency less than 20 Hz are called
A : longitudinal wave
B : ultrasonic wave
C : Infrasonic waves
D : mechanical wave
Q.no 42. ln superconductivity, the conductivity of a material becomes.
A : zero
B : finite
C : infinite
D : None of the above
Q.no 43. The intensity level expressed in a unit
A : bel
B : 10-12W/m2
C : Newton
D : db/m
Q.no 44. In Newton’s ring experiment ,with air as a medium between Plano convex lens and glass plate, diameter of nth dark ring is
A : √4nrλ
B : √4nr
C : √(2n-1)2rλ
D : √4nr/λ
Q.no 45. At the critical temperature and less than critical temperature the resistance of a superconductor.
A : increase rapidly
B : decrease rapidly
C : remains zero
D : increase slowly
Q.no 46. For constructive interference the path difference should be
A : Zero or odd multiple of wavelength
B : Only integral multiple of wavelength
C : 0
D : Zero or integral multiple of wavelength
Q.no 47. Ψ is called the wave function of the particle. If |Ψ|2 is 0.1, the probability of finding the particle at a given location at a given time is
A : 0.1
B : (0.1)2
C : (0.1)1/2
D : None of these
Q.no 48. When the size of the material is reduced to size in nano region, the energy band structure undergo______________which mainly accounts for the change in the properties of nanoparticles
A : Small variations
B : large variations
C : Splitting
D : scattering
Q.no 49. Quantum mechanically, minimum energy of a particle enclosed in a potential well cannot be
A : 1 eV
B : zero
C : 100 eV
D : 1 KeV
Q.no 50. piezoelectric effect has been observed in
A : nickel
B : glass
C : quartz
D : mica
Q.no 51. If the material is reduced to nano size then properties of those materials _____________ from those of the bulk material
A : slightly differ
B : drastically differ
C : remain same
D : can’t say
Q.no 52. Bending of light around the straight edge of obstacle and spreading into its geometrical shadow is called as
A : Diffraction
B : Interference
C : Polarization
D : Dispersion
Q.no 53. Wave function Ψ represents
A : Potential energy of particles producing matter waves
B : Oscillations of quantity that produces matter waves
C : Momentum of particles that produces matter waves
D : Kinetic energy of particles producing matter waves
Q.no 54. n type & p type silicon can be obtained by doping pure silicon with
A : Arsenic & Phosphorus
B : Indium & Aluminum
C : Phosphorus & Indium
D : Aluminum & Boron
Q.no 55. The forbidden energy gap in an insulator is of the order of
A : 1 eV
B : 2 eV
C : 0.1 eV
D : 5 eV
Q.no 56. Ultrasonic are sound waves having frequency greater than
A : 20 MHz
B : 20 kHz
C : 20GHz
D : 20 Hz
Q.no 57. Intensity at any point on the screen at angle Ѳ for Fraunhoffer single slit is given by I
A : (n/2)π
B : Im(sinα/α)2
C : sin-1(nλ/a)
D : (sinα/α)2
Q.no 58. Matter waves are associated with
A : Positively charged particles
B : Negatively charged particles
C : Neutral particles
D : All of these
Q.no 59. An echo is heard when direct sound waves coming from the source and its reflected wave reach the listener with a time interval of about
A : 1/14 seconds
B : 1/3 seconds
C : 1/7 seconds
D : 1/19 seconds
Q.no 60. Velocity of sound wave is given by
A : v = f/λ
B : v = f.λ
C : v =λ/f
D : v = f/T
Seat No -
Total number of questions : 60
1000499 T1 ENGINEERING PHYSICS
Time : 1hr
Max Marks : 50
N.B
1) All questions are Multiple Choice Questions having single correct option.
2) Attempt any 50 questions out of 60.
3) Use of calculator is allowed.
4) Each question carries 1 Mark.
5) Specially abled students are allowed 20 minutes extra for examination.
6) Do not use pencils to darken answer.
7) Use only black/blue ball point pen to darken the appropriate circle.
8) No change will be allowed once the answer is marked on OMR Sheet.
9) Rough work shall not be done on OMR sheet or on question paper.
10) Darken ONLY ONE CIRCLE for each answer.
Q.no 1. According to de Broglie hypothesis
A : A particle in rest has matter waves associated with it
B : A particle at rest or in motion has matter wave associated with it
C : A particle in motion has matter wave associated with it
D : All above statements are correct
Q.no 2. The characteristics of laser beam are
A : Highly directional
B : Highly intense
C : Highly monochromatic
D : All of these
Q.no 3. Which is the correct relation for forbidden energy gap in conductor, semi-conductor and insulator?
A : ΔEg conductor > ΔEg semiconductor> ΔEginsulator
B : ΔEgconductor > ΔEginsulator > Δ Eg semiconductor
C : ΔEginsulator > Δ Eg semiconductor > ΔEgconductor
D : ΔEg semiconductor > Δ Egconductor > ΔEginsulator
Q.no 4. In an N-type semiconductor, donor level is
A : above the conduction band of the host
B : close to the conduction band of the host
C : close to the valence band of the host crystal.
D : below to the valence band of the host crystal
Q.no 5. A hologram is most similar to a
A : Dispersion
B : prism
C : 3-D photograph
D : compound lens
Q.no 6. The walls of the hall built for music concerns should
A : Amplify sound
B : Reflect sound
C : Transmit sound
D : D Absorb sound
Q.no 7. We prefer Polaroid sunglasses because they
A : have soothing colours
B : reduce the intensity of light
C : are cheaper
D : can change colour
Q.no 8. De Broglie wave is expresssed in terms of Ψ. What is Ψ?
A : It is the energy of particles producing matter waves
B : It is the momentum of particles producing matter waves
C : It is the uncertainity in position of particles producing matter waves
D : It represents the oscillations of quantity that produces matter waves.
Q.no 9. Effective path difference between two successive reflected rays by thin parallel film is
A : 2μtcosr+ λ/2
B : 0
C : 2μtcosr
D : 2μtcosr+n λ
Q.no 10. Reverse bias applied on a junction diode-----------
A : raises the potential barrier
B : decrease the minority carrier current
C : increases the majority carrier current
D : lowers the potential barrier
Q.no 11. The Cooper pairs are electron pairs with
A : equal and same momentum
B : Unequal & same spin
C : Equal and opposite momentum and spin
D : Unequal & opposite spin and momentum
Q.no 12. Formation of colour in a thin film of oil is due to
A : Interference of light waves
B : Diffraction of light waves
C : Scattering of light rays rays
D : Dispersion of light rays
Q.no 13. _________ superconductors are also called soft superconductors
A : Type I
B : Type II
C : Type III
D : Type IV
Q.no 14. A path difference of 3λ/2 between the two waves corresponds to the phase difference
A : 3π/2
B : π/3
C : 3π
D : 2π/3
Q.no 15. If the gap between plano- convex lens and plane glass plate filled with the liquid instead of air then
A : Diameter of rings increases
B : Diameter of rings decreases
C : Diameter of rings does not change
D : All above are correct
Q.no 16. Current once initiated in a superconducting ring can continue to flow infinitely without any power losses
Is called
Is called
A : Infinite current
B : Critical current
C : Persistent current
D : induced current
Q.no 17. Intensity of diffraction at an angle ѳ for fraunhoffer diffraction by grating is given by Iѳ
A : (sinNβ/ sinβ)
B : (sinβ)2
C : (sinα/α)2
D : Im(sinα/α)2 (sinNβ/ sinβ)2
Q.no 18. What happens to O-ray and E-ray if they travel along the optic axis?
A : E-ray travels faster than O-ray
B : O-ray travels faster than E-ray
C : Both ray travels with same velocity
D : None of the above
Q.no 19. In Newton's rings the central spot is
A : Always bright
B : Always dark
C : Can be bright or dark
D : Of blue colour
Q.no 20. Depletion layer consists of
A : electrons
B : mobile ions
C : protons.
D : immobile ions
Q.no 21. The quarter wave plate produces
A : Path difference of λ/4 or phase difference of π /2 radians between O- and E-waves
B : Path difference of λ /2 or phase difference of π /2 radians
C : Path difference of λ /4 or phase difference of π radians
D : None of the above
Q.no 22. Matter waves would be more significant for particles having mass
A : About 10 x 103 g
B : About 10 x 10-14 g
C : About 10 x 1014 g
D : About 10 x 10 -28 g
Q.no 23. In forward bias, the width of depletion region in a p-n junction diode
A : increases
B : decreases
C : remains constant
D : first (A) then (B)
Q.no 24. Which of the following when added as an impurity into the silicon produces N-type semiconductor?
A : P
B : B
C : Al
D : Mg
Q.no 25. According to the Malu’s law, the intensity of polarized light emerging through the analyzer varies as
A : I =Iₒ cosθ
B : I =Iₒ/cos2θ
C : I =Iₒ / cos²θ
D : I =Iₒ cos²θ
Q.no 26. Nanotechnology is the science of designing,creating and using the materials in which atleast one dimension has a size in the range of
A : 1nm-100nm
B : 0.01nm to 0.1 nm
C : 100 nm- 1000nm
D : 30- 50 nm
Q.no 27. In case of ruby laser, optical resonator cavity is formed by the silvered ends of
A : Ruby crystal
B : The Calcium crystal
C : Tourmaline crystal
D : Quartz crystal
Q.no 28. When the light is incident at the polarizing angle, which of the following is completely polarized?
A : reflected light
B : refracted light
C : both reflected as well as refracted light
D : neither reflected nor refracted light
Q.no 29. In Newton’s ring experiment if the air film is replaced by water film, then the diameter of the ring
A : Decreases
B : Increases
C : Remains same
D : None of the above
Q.no 30. Laevo-rotatory optically active substance rotates the plane of vibrations
A : In clockwise direction
B : In left hand side
C : By 1800
D : None of the above
Q.no 31. Types - l superconductors are ___________ temperature superconductor.
A : low
B : absolute
C : High
D : None of the Above
Q.no 32. __________ are used in sunscreen lotions to protect the skin from ultraviolet radiations
A : Zinc oxide and Titanium oxide nanoparticles
B : Talcum stone particles
C : Non-metal nanoparticles
D : Quantum dots
Q.no 33. The current in a superconductor produces
A : zero, voltage drop across it
B : a strong, electric field around it
C : a small voltage drop across it
D : a large voltage drop across it
Q.no 34. Laser action is possible only if there is
A : a set of reflecting mirrors
B : a black body
C : population inversion
D : oscillations of laser source
Q.no 35. The expression for the thickness of a half-wave plate of positive crystal is
A : t = λ / (μe - μo )
B : t = λ / 2(μe - μo )
C : t = λ / 3(μe - μo )
D : t = λ /2 (μo – μe )
Q.no 36. The Fermi level in intrinsic semiconductor lies exactly at the of the forbidden band
A : above
B : center
C : below
D : none of these
Q.no 37. The light source used for optical pumping in Ruby laser is
A : Xenon
B : Argon
C : Neon
D : none of the above
Q.no 38. Loudness of sound is found to be proportional to the
A : log 10 L
B : log 10 I
C : area
D : log 10 s
Q.no 39. The impurity level in an extrinsic semiconductor is about of pure semiconductor
A : 10 atoms for 103 atoms
B : 10 atoms for 102 atoms
C : 1 atoms for 108 atoms
D : 1 atoms for 100 atom
Q.no 40. In the Fresnel diffraction the incident wave front is
A : Spherical
B : Cylindrical
C : Spherical or cylindrical
D : Plane
Q.no 41. Sound waves of frequency less than 20 Hz are called
A : longitudinal wave
B : ultrasonic wave
C : Infrasonic waves
D : mechanical wave
Q.no 42. ln superconductivity, the conductivity of a material becomes.
A : zero
B : finite
C : infinite
D : None of the above
Q.no 43. The intensity level expressed in a unit
A : bel
B : 10-12W/m2
C : Newton
D : db/m
Q.no 44. In Newton’s ring experiment ,with air as a medium between Plano convex lens and glass plate, diameter of nth dark ring is
A : √4nrλ
B : √4nr
C : √(2n-1)2rλ
D : √4nr/λ
Q.no 45. At the critical temperature and less than critical temperature the resistance of a superconductor.
A : increase rapidly
B : decrease rapidly
C : remains zero
D : increase slowly
Q.no 46. For constructive interference the path difference should be
A : Zero or odd multiple of wavelength
B : Only integral multiple of wavelength
C : 0
D : Zero or integral multiple of wavelength
Q.no 47. Ψ is called the wave function of the particle. If |Ψ|2 is 0.1, the probability of finding the particle at a given location at a given time is
A : 0.1
B : (0.1)2
C : (0.1)1/2
D : None of these
Q.no 48. When the size of the material is reduced to size in nano region, the energy band structure undergo______________which mainly accounts for the change in the properties of nanoparticles
A : Small variations
B : large variations
C : Splitting
D : scattering
Q.no 49. Quantum mechanically, minimum energy of a particle enclosed in a potential well cannot be
A : 1 eV
B : zero
C : 100 eV
D : 1 KeV
Q.no 50. piezoelectric effect has been observed in
A : nickel
B : glass
C : quartz
D : mica
Q.no 51. If the material is reduced to nano size then properties of those materials _____________ from those of the bulk material
A : slightly differ
B : drastically differ
C : remain same
D : can’t say
Q.no 52. Bending of light around the straight edge of obstacle and spreading into its geometrical shadow is called as
A : Diffraction
B : Interference
C : Polarization
D : Dispersion
Q.no 53. Wave function Ψ represents
A : Potential energy of particles producing matter waves
B : Oscillations of quantity that produces matter waves
C : Momentum of particles that produces matter waves
D : Kinetic energy of particles producing matter waves
Q.no 54. n type & p type silicon can be obtained by doping pure silicon with
A : Arsenic & Phosphorus
B : Indium & Aluminum
C : Phosphorus & Indium
D : Aluminum & Boron
Q.no 55. The forbidden energy gap in an insulator is of the order of
A : 1 eV
B : 2 eV
C : 0.1 eV
D : 5 eV
Q.no 56. Ultrasonic are sound waves having frequency greater than
A : 20 MHz
B : 20 kHz
C : 20GHz
D : 20 Hz
Q.no 57. Intensity at any point on the screen at angle Ѳ for Fraunhoffer single slit is given by I
A : (n/2)π
B : Im(sinα/α)2
C : sin-1(nλ/a)
D : (sinα/α)2
Q.no 58. Matter waves are associated with
A : Positively charged particles
B : Negatively charged particles
C : Neutral particles
D : All of these
Q.no 59. An echo is heard when direct sound waves coming from the source and its reflected wave reach the listener with a time interval of about
A : 1/14 seconds
B : 1/3 seconds
C : 1/7 seconds
D : 1/19 seconds
Q.no 60. Velocity of sound wave is given by
A : v = f/λ
B : v = f.λ
C : v =λ/f
D : v = f/T
Answer for Question No 1. is c
Answer for Question No 2. is d
Answer for Question No 3. is c
Answer for Question No 4. is b
Answer for Question No 5. is c
Answer for Question No 6. is d
Answer for Question No 7. is b
Answer for Question No 8. is d
Answer for Question No 9. is a
Answer for Question No 10. is a
Answer for Question No 11. is c
Answer for Question No 12. is a
Answer for Question No 13. is a
Answer for Question No 14. is c
Answer for Question No 15. is b
Answer for Question No 16. is c
Answer for Question No 17. is d
Answer for Question No 18. is c
Answer for Question No 19. is b
Answer for Question No 20. is d
Answer for Question No 21. is a
Answer for Question No 22. is d
Answer for Question No 23. is b
Answer for Question No 24. is a
Answer for Question No 25. is d
Answer for Question No 26. is a
Answer for Question No 27. is a
Answer for Question No 28. is a
Answer for Question No 29. is a
Answer for Question No 30. is b
Answer for Question No 31. is a
Answer for Question No 32. is a
Answer for Question No 33. is a
Answer for Question No 34. is c
Answer for Question No 35. is b
Answer for Question No 36. is b
Answer for Question No 37. is a
Answer for Question No 38. is b
Answer for Question No 39. is c
Answer for Question No 40. is a
Answer for Question No 41. is c
Answer for Question No 42. is c
Answer for Question No 43. is a
Answer for Question No 44. is a
Answer for Question No 45. is c
Answer for Question No 46. is d
Answer for Question No 47. is a
Answer for Question No 48. is b
Answer for Question No 49. is b
Answer for Question No 50. is c
Answer for Question No 51. is b
Answer for Question No 52. is a
Answer for Question No 53. is b
Answer for Question No 54. is c
Answer for Question No 55. is d
Answer for Question No 56. is b
Answer for Question No 57. is b
Answer for Question No 58. is d
Answer for Question No 59. is c
Answer for Question No 60. is b
Seat No -
Total number of questions : 60
1000499 T1 ENGINEERING PHYSICS
Time : 1hr
Max Marks : 50
N.B
1) All questions are Multiple Choice Questions having single correct option.
2) Attempt any 50 questions out of 60.
3) Use of calculator is allowed.
4) Each question carries 1 Mark.
5) Specially abled students are allowed 20 minutes extra for examination.
6) Do not use pencils to darken answer.
7) Use only black/blue ball point pen to darken the appropriate circle.
8) No change will be allowed once the answer is marked on OMR Sheet.
9) Rough work shall not be done on OMR sheet or on question paper.
10) Darken ONLY ONE CIRCLE for each answer.
Q.no 1. When the light is incident at the polarizing angle, which of the following is completely polarized?
A : reflected light
B : refracted light
C : both reflected as well as refracted light
D : neither reflected nor refracted light
Q.no 2. piezoelectric effect has been observed in
A : nickel
B : glass
C : quartz
D : mica
Q.no 3. Formation of colour in a thin film of oil is due to
A : Interference of light waves
B : Diffraction of light waves
C : Scattering of light rays rays
D : Dispersion of light rays
Q.no 4. When the size of the material reduces, the surface area to volume ratio ________
A : decreases
B : Increases
C : remains same
D : becomes exactly equal to the volume
Q.no 5. Laevo-rotatory optically active substance rotates the plane of vibrations
A : In clockwise direction
B : In left hand side
C : By 1800
D : None of the above
Q.no 6. What happens to O-ray and E-ray if they travel along the optic axis?
A : E-ray travels faster than O-ray
B : O-ray travels faster than E-ray
C : Both ray travels with same velocity
D : None of the above
Q.no 7. _ _ _ _ _ superconductor is completely diamagnetic
A : Type - l
B : Type - ll
C : both
D : none of the above
Q.no 8. In Newton’s ring experiment if the air film is replaced by water film, then the diameter of the ring
A : Decreases
B : Increases
C : Remains same
D : None of the above
Q.no 9. Sound travel in the form of
A : longitudinal
B : transverse
C : mechanical
D : Infrasonic waves
Q.no 10. Which of the following cannot be polarized?
A : Radio waves
B : Sound waves
C : Light waves
D : X-rays
Q.no 11. LASER is a short form of
A : Light attenuation by stimulated emission of radiation
B : Light amplification by stimulated emission of radiation
C : Light absorption by stimulated emission of radiation
D : Light absorption by spontaneous emission of radiation
Q.no 12. Loudness of sound is found to be proportional to the
A : log 10 L
B : log 10 I
C : area
D : log 10 s
Q.no 13. If the material is reduced to nano size then properties of those materials _____________ from those of the bulk material
A : slightly differ
B : drastically differ
C : remain same
D : can’t say
Q.no 14. In forward bias, the width of depletion region in a p-n junction diode
A : increases
B : decreases
C : remains constant
D : first (A) then (B)
Q.no 15. Wave function Ψ represents
A : Potential energy of particles producing matter waves
B : Oscillations of quantity that produces matter waves
C : Momentum of particles that produces matter waves
D : Kinetic energy of particles producing matter waves
Q.no 16. Fringe width is defined as the distance between two consecutive
A : Crests
B : Bright fringes only
C : Dark fringes only
D : Bright or dark fringes
Q.no 17. Matter waves would be more significant for particles having mass
A : About 10 x 103 g
B : About 10 x 10-14 g
C : About 10 x 1014 g
D : About 10 x 10 -28 g
Q.no 18. The intensity of central bright band in the case of diffraction is
A : maximum
B : minimum
C : varies between max to min
D : none of above
Q.no 19. When the size of the material is reduced to size in nano region, the energy band structure undergo______________which mainly accounts for the change in the properties of nanoparticles
A : Small variations
B : large variations
C : Splitting
D : scattering
Q.no 20. Sound intensity is
A : energy/time
B : wb/m3
C : watt/m2
D : energy/time. area
Q.no 21. The Fermi level in intrinsic semiconductor lies exactly at the of the forbidden band
A : above
B : center
C : below
D : none of these
Q.no 22. The quarter wave plate produces
A : Path difference of λ/4 or phase difference of π /2 radians between O- and E-waves
B : Path difference of λ /2 or phase difference of π /2 radians
C : Path difference of λ /4 or phase difference of π radians
D : None of the above
Q.no 23. The temperature at which conductivity of material becomes infinite is called.
A : Critical temperature
B : absolute temperature
C : Mean temperature
D : Crystallization temperature
Q.no 24. At 0 K, intrinsic semiconductor behaves as
A : a perfect conductor
B : a super conductor
C : a semiconductor
D : a perfect insulator
Q.no 25. In Fraunhoffer diffraction distance of slit from source and screen is
A : finite
B : infinite
C : parallel
D : not equal
Q.no 26. Plane polarized light can be produced by
A : Simple reflection
B : Pile of plates
C : Nicol’s prism
D : All of these
Q.no 27. Ultrasonic waves are produced by
A : piezoelectric effect
B : Doppler effect
C : Peltier effect
D : magneto-optic effect
Q.no 28. When two semiconductors of p-type & n-type are brought in contact with each other, the P-N junction formed behaves like
A : an oscillator
B : an amplifier
C : a diode
D : a conductor
Q.no 29. At the critical temperature and less than critical temperature the resistance of a superconductor.
A : increase rapidly
B : decrease rapidly
C : remains zero
D : increase slowly
Q.no 30. Depletion layer consists of
A : electrons
B : mobile ions
C : protons.
D : immobile ions
Q.no 31. The current in a superconductor produces
A : zero, voltage drop across it
B : a strong, electric field around it
C : a small voltage drop across it
D : a large voltage drop across it
Q.no 32. Intensity of diffraction at an angle ѳ for fraunhoffer diffraction by grating is given by Iѳ
A : (sinNβ/ sinβ)
B : (sinβ)2
C : (sinα/α)2
D : Im(sinα/α)2 (sinNβ/ sinβ)2
Q.no 33. The active medium of a helium-neon laser is made up with ________ ratio of helium-neon.
A : 10:1
B : 10:3
C : 10:5
D : 10:6
Q.no 34. For the Solar cell the ratio of maximum power delivered to ideal power is called as
A : Efficiency
B : Fill factor
C : short-circuit
D : Open-circuit
Q.no 35. The impurity level in an extrinsic semiconductor is about of pure semiconductor
A : 10 atoms for 103 atoms
B : 10 atoms for 102 atoms
C : 1 atoms for 108 atoms
D : 1 atoms for 100 atom
Q.no 36. A path difference of 3λ/2 between the two waves corresponds to the phase difference
A : 3π/2
B : π/3
C : 3π
D : 2π/3
Q.no 37. The phenomenon in which the magnetic line of force are expelled out of the superconducting material at Critical temperature is called.
A : isotopic effect
B : Meissner effect
C : BCS * theory
D : London theory
Q.no 38. Current once initiated in a superconducting ring can continue to flow infinitely without any power losses
Is called
Is called
A : Infinite current
B : Critical current
C : Persistent current
D : induced current
Q.no 39. To check the optical flatness of the surface in wedge-shape thin film fringe-width must be
A : Equal, straight
B : Unequal, straight
C : Unequal, curved
D : Equal, curved
Q.no 40. Data storage capacities of hard disks and have led to small and faster microprocessors due to the use of ______________
A : Nanosized electronic components
B : Pure semiconductors
C : Capacitive components
D : Inductive components
Q.no 41. According to de Broglie hypothesis
A : A particle in rest has matter waves associated with it
B : A particle at rest or in motion has matter wave associated with it
C : A particle in motion has matter wave associated with it
D : All above statements are correct
Q.no 42. __________ are used in sunscreen lotions to protect the skin from ultraviolet radiations
A : Zinc oxide and Titanium oxide nanoparticles
B : Talcum stone particles
C : Non-metal nanoparticles
D : Quantum dots
Q.no 43. Plane polarized light has vibrations
A : In one direction perpendicular to direction of propagation
B : Along the direction of propagation
C : In two directions perpendicular to direction of propagation
D : In all directions perpendicular to direction of propagation
Q.no 44. ln superconductivity, the conductivity of a material becomes.
A : zero
B : finite
C : infinite
D : None of the above
Q.no 45. When a ray is reflected from denser medium, its phase changes by(in radian)
A : 0
B : π
C : 2π
D : 3π
Q.no 46. Principal maxima for fraunhoffer single slit diffraction is obtained at ѳ
A : nλ
B : (n/2)π
C : 1
D : 0
Q.no 47. The speed of sound in medium depends upon
A : Amplitude
B : frequency
C : wavelength
D : properties of the medium
Q.no 48. Ψ is called the wave function of the particle. If |Ψ|2 is 0.1, the probability of finding the particle at a given location at a given time is
A : 0.1
B : (0.1)2
C : (0.1)1/2
D : None of these
Q.no 49. In a semiconductor, current conduction is due to
A : only holes
B : both holes and free electrons
C : only free electrons
D : none of the above
Q.no 50. Which of the following when added as an impurity into the silicon produces N-type semiconductor?
A : P
B : B
C : Al
D : Mg
Q.no 51. Bending of light around the straight edge of obstacle and spreading into its geometrical shadow is called as
A : Diffraction
B : Interference
C : Polarization
D : Dispersion
Q.no 52. Reverberation time T of a hall varies is inversely proportional as the
A : density
B : degree of sensation
C : effective area
D : square of amplitude
Q.no 53. n type & p type silicon can be obtained by doping pure silicon with
A : Arsenic & Phosphorus
B : Indium & Aluminum
C : Phosphorus & Indium
D : Aluminum & Boron
Q.no 54. The light source used for optical pumping in Ruby laser is
A : Xenon
B : Argon
C : Neon
D : none of the above
Q.no 55. Heisenberg Uncertainty Principle is significant for subatomic particles because
A : Their energy is small
B : They show wave particle duality
C : Their velocity is small
D : They show photoelectric effect
Q.no 56. Ultrasonic are sound waves having frequency greater than
A : 20 MHz
B : 20 kHz
C : 20GHz
D : 20 Hz
Q.no 57. The reverberation time is the time required for the intensity to drop by
A : 30dB
B : 90dB
C : C 60dB
D : 120dB
Q.no 58. Intensity at any point on the screen at angle Ѳ for Fraunhoffer single slit is given by I
A : (n/2)π
B : Im(sinα/α)2
C : sin-1(nλ/a)
D : (sinα/α)2
Q.no 59. Matter waves are associated with
A : Positively charged particles
B : Negatively charged particles
C : Neutral particles
D : All of these
Q.no 60. The name given to the unit of sound absorption is-
A : decibel
B : degree
C : sabine
D : watt
Answer for Question No 1. is a
Answer for Question No 2. is c
Answer for Question No 3. is a
Answer for Question No 4. is b
Answer for Question No 5. is b
Answer for Question No 6. is c
Answer for Question No 7. is a
Answer for Question No 8. is a
Answer for Question No 9. is a
Answer for Question No 10. is b
Answer for Question No 11. is b
Answer for Question No 12. is b
Answer for Question No 13. is b
Answer for Question No 14. is b
Answer for Question No 15. is b
Answer for Question No 16. is d
Answer for Question No 17. is d
Answer for Question No 18. is a
Answer for Question No 19. is b
Answer for Question No 20. is d
Answer for Question No 21. is b
Answer for Question No 22. is a
Answer for Question No 23. is a
Answer for Question No 24. is d
Answer for Question No 25. is b
Answer for Question No 26. is d
Answer for Question No 27. is a
Answer for Question No 28. is c
Answer for Question No 29. is c
Answer for Question No 30. is d
Answer for Question No 31. is a
Answer for Question No 32. is d
Answer for Question No 33. is a
Answer for Question No 34. is b
Answer for Question No 35. is c
Answer for Question No 36. is c
Answer for Question No 37. is b
Answer for Question No 38. is c
Answer for Question No 39. is a
Answer for Question No 40. is a
Answer for Question No 41. is c
Answer for Question No 42. is a
Answer for Question No 43. is a
Answer for Question No 44. is c
Answer for Question No 45. is b
Answer for Question No 46. is d
Answer for Question No 47. is d
Answer for Question No 48. is a
Answer for Question No 49. is c
Answer for Question No 50. is a
Answer for Question No 51. is a
Answer for Question No 52. is c
Answer for Question No 53. is c
Answer for Question No 54. is a
Answer for Question No 55. is b
Answer for Question No 56. is b
Answer for Question No 57. is c
Answer for Question No 58. is b
Answer for Question No 59. is d
Answer for Question No 60. is c
Seat No -
Total number of questions : 60
1000499 T1 ENGINEERING PHYSICS
Time : 1hr
Max Marks : 50
N.B
1) All questions are Multiple Choice Questions having single correct option.
2) Attempt any 50 questions out of 60.
3) Use of calculator is allowed.
4) Each question carries 1 Mark.
5) Specially abled students are allowed 20 minutes extra for examination.
6) Do not use pencils to darken answer.
7) Use only black/blue ball point pen to darken the appropriate circle.
8) No change will be allowed once the answer is marked on OMR Sheet.
9) Rough work shall not be done on OMR sheet or on question paper.
10) Darken ONLY ONE CIRCLE for each answer.
Q.no 1. In a narrow wave packet of matter wave
A : The position of the particle cannot be determined accurately
B : The momentum of the particle cannot be determined accurately
C : Concept of wave group does not exist
D : Phase velocity is always zero
Q.no 2. When two semiconductors of p-type & n-type are brought in contact with each other, the P-N junction formed behaves like
A : an oscillator
B : an amplifier
C : a diode
D : a conductor
Q.no 3. In the P-type semiconductor, the hole concentration in valence band is----------- than the electron concentration in conduction band.
A : less than
B : greater than
C : equal to
D : all of these
Q.no 4. Current once initiated in a superconducting ring can continue to flow infinitely without any power losses
Is called
Is called
A : Infinite current
B : Critical current
C : Persistent current
D : induced current
Q.no 5. The normalization condition indicates that probabilities of finding the particle
A : in a small volume summed up over the entire space must give 1
B : in a small volume must give 1
C : in a small volume summed up along the positive direction must give 1
D : in a small volume summed up along the negative direction must give 1
Q.no 6. The light source used for optical pumping in Ruby laser is
A : Xenon
B : Argon
C : Neon
D : none of the above
Q.no 7. What happens to O-ray and E-ray if they travel along the optic axis?
A : E-ray travels faster than O-ray
B : O-ray travels faster than E-ray
C : Both ray travels with same velocity
D : None of the above
Q.no 8. Wave function Ψ represents
A : Potential energy of particles producing matter waves
B : Oscillations of quantity that produces matter waves
C : Momentum of particles that produces matter waves
D : Kinetic energy of particles producing matter waves
Q.no 9. Sound intensity is
A : energy/time
B : wb/m3
C : watt/m2
D : energy/time. area
Q.no 10. piezoelectric effect has been observed in
A : nickel
B : glass
C : quartz
D : mica
Q.no 11. Pumping process used in diode laser is
A : optical pumping
B : forward biased voltage
C : electrical discharge
D : none of these
Q.no 12. The speed of sound in medium depends upon
A : Amplitude
B : frequency
C : wavelength
D : properties of the medium
Q.no 13. In Newton’s ring experiment if the air film is replaced by water film, then the diameter of the ring
A : Decreases
B : Increases
C : Remains same
D : None of the above
Q.no 14. ln superconductivity, the conductivity of a material becomes.
A : zero
B : finite
C : infinite
D : None of the above
Q.no 15. Heisenberg Uncertainty Principle is significant for subatomic particles because
A : Their energy is small
B : They show wave particle duality
C : Their velocity is small
D : They show photoelectric effect
Q.no 16. At the critical temperature and less than critical temperature the resistance of a superconductor.
A : increase rapidly
B : decrease rapidly
C : remains zero
D : increase slowly
Q.no 17. LASER is a short form of
A : Light attenuation by stimulated emission of radiation
B : Light amplification by stimulated emission of radiation
C : Light absorption by stimulated emission of radiation
D : Light absorption by spontaneous emission of radiation
Q.no 18. A hologram is most similar to a
A : Dispersion
B : prism
C : 3-D photograph
D : compound lens
Q.no 19. In a semiconductor, current conduction is due to
A : only holes
B : both holes and free electrons
C : only free electrons
D : none of the above
Q.no 20. Loudness of sound is found to be proportional to the
A : log 10 L
B : log 10 I
C : area
D : log 10 s
Q.no 21. Data storage capacities of hard disks and have led to small and faster microprocessors due to the use of ______________
A : Nanosized electronic components
B : Pure semiconductors
C : Capacitive components
D : Inductive components
Q.no 22. When a ray is reflected from denser medium, its phase changes by(in radian)
A : 0
B : π
C : 2π
D : 3π
Q.no 23. The phenomenon in which the magnetic line of force are expelled out of the superconducting material at Critical temperature is called.
A : isotopic effect
B : Meissner effect
C : BCS * theory
D : London theory
Q.no 24. For constructive interference the path difference should be
A : Zero or odd multiple of wavelength
B : Only integral multiple of wavelength
C : 0
D : Zero or integral multiple of wavelength
Q.no 25. When the size of the material reduces, the surface area to volume ratio ________
A : decreases
B : Increases
C : remains same
D : becomes exactly equal to the volume
Q.no 26. Which of the following cannot be polarized?
A : Radio waves
B : Sound waves
C : Light waves
D : X-rays
Q.no 27. For the Solar cell the ratio of maximum power delivered to ideal power is called as
A : Efficiency
B : Fill factor
C : short-circuit
D : Open-circuit
Q.no 28. __________ are used in sunscreen lotions to protect the skin from ultraviolet radiations
A : Zinc oxide and Titanium oxide nanoparticles
B : Talcum stone particles
C : Non-metal nanoparticles
D : Quantum dots
Q.no 29. Superconductivity was first observed by
A : Volta
B : Meissner
C : Kamerling Onnes
D : Schrieffer
Q.no 30. Formation of colour in a thin film of oil is due to
A : Interference of light waves
B : Diffraction of light waves
C : Scattering of light rays rays
D : Dispersion of light rays
Q.no 31. Which of the following will remain unchanged when a sound wave travels in air or in water?
A : Amplitude
B : frequency
C : wavelength
D : Speed
Q.no 32. According to the Malu’s law, the intensity of polarized light emerging through the analyzer varies as
A : I =Iₒ cosθ
B : I =Iₒ/cos2θ
C : I =Iₒ / cos²θ
D : I =Iₒ cos²θ
Q.no 33. Effective path difference between two successive reflected rays by thin parallel film is
A : 2μtcosr+ λ/2
B : 0
C : 2μtcosr
D : 2μtcosr+n λ
Q.no 34. Matter waves would be more significant for particles having mass
A : About 10 x 103 g
B : About 10 x 10-14 g
C : About 10 x 1014 g
D : About 10 x 10 -28 g
Q.no 35. Depth sounding technique is based on principle of
A : Cavitations
B : navigation
C : reflection
D : echo sounding
Q.no 36. We prefer Polaroid sunglasses because they
A : have soothing colours
B : reduce the intensity of light
C : are cheaper
D : can change colour
Q.no 37. Nanotechnology is the science of designing,creating and using the materials in which atleast one dimension has a size in the range of
A : 1nm-100nm
B : 0.01nm to 0.1 nm
C : 100 nm- 1000nm
D : 30- 50 nm
Q.no 38. The expression for the thickness of a half-wave plate of positive crystal is
A : t = λ / (μe - μo )
B : t = λ / 2(μe - μo )
C : t = λ / 3(μe - μo )
D : t = λ /2 (μo – μe )
Q.no 39. Ψ is called the wave function of the particle. If |Ψ|2 is 0.1, the probability of finding the particle at a given location at a given time is
A : 0.1
B : (0.1)2
C : (0.1)1/2
D : None of these
Q.no 40. The walls of the hall built for music concerns should
A : Amplify sound
B : Reflect sound
C : Transmit sound
D : D Absorb sound
Q.no 41. The quarter wave plate produces
A : Path difference of λ/4 or phase difference of π /2 radians between O- and E-waves
B : Path difference of λ /2 or phase difference of π /2 radians
C : Path difference of λ /4 or phase difference of π radians
D : None of the above
Q.no 42. _________ superconductors are also called soft superconductors
A : Type I
B : Type II
C : Type III
D : Type IV
Q.no 43. When the temperature of n- type semiconductor is increased
A : net negative charge increases
B : minority carriers decreases
C : electron-hole pairs increases
D : none of the above
Q.no 44. De Broglie wave is expresssed in terms of Ψ. What is Ψ?
A : It is the energy of particles producing matter waves
B : It is the momentum of particles producing matter waves
C : It is the uncertainity in position of particles producing matter waves
D : It represents the oscillations of quantity that produces matter waves.
Q.no 45. To check the optical flatness of the surface in wedge-shape thin film fringe-width must be
A : Equal, straight
B : Unequal, straight
C : Unequal, curved
D : Equal, curved
Q.no 46. Sound travel in the form of
A : longitudinal
B : transverse
C : mechanical
D : Infrasonic waves
Q.no 47. The forbidden energy gap in an insulator is of the order of
A : 1 eV
B : 2 eV
C : 0.1 eV
D : 5 eV
Q.no 48. Reverse bias applied on a junction diode-----------
A : raises the potential barrier
B : decrease the minority carrier current
C : increases the majority carrier current
D : lowers the potential barrier
Q.no 49. The main principle of optical fiber is
A : total internal dispersion
B : total internal reflection
C : total internal refraction
D : none of the above
Q.no 50. According to de Broglie hypothesis equation λ=h/p is applicable for
A : Matter particle only
B : Photons only
C : Both matter particle and photon
D : All options are correct
Q.no 51. Sound waves of frequency less than 20 Hz are called
A : longitudinal wave
B : ultrasonic wave
C : Infrasonic waves
D : mechanical wave
Q.no 52. Bending of light around the straight edge of obstacle and spreading into its geometrical shadow is called as
A : Diffraction
B : Interference
C : Polarization
D : Dispersion
Q.no 53. In the Fresnel diffraction the incident wave front is
A : Spherical
B : Cylindrical
C : Spherical or cylindrical
D : Plane
Q.no 54. In forward bias, the width of depletion region in a p-n junction diode
A : increases
B : decreases
C : remains constant
D : first (A) then (B)
Q.no 55. What would be true for wavelengths of De Broglie waves
A : λ (electron) = λ (proton)
B : λ (electron) > λ (proton)
C : λ (electron) < λ (proton)
D : λ (electron) ~ λ (proton)
Q.no 56. The basic principle of holography is
A : to create the interference pattern of object wave only
B : to create the interference pattern of reference wave only
C : to create the interference pattern of object wave and reference wave
D : none of the above
Q.no 57. Schrodinger's equation is required for explaining behavior of subatomic particles because
A : Subatomic particles show wave particle duality
B : Matter wave is associated with subatomic waves
C : Newton's laws of motion cannot be applied to matter waves
D : All options are correct
Q.no 58. Matter waves are associated with
A : Positively charged particles
B : Negatively charged particles
C : Neutral particles
D : All of these
Q.no 59. An echo is heard when direct sound waves coming from the source and its reflected wave reach the listener with a time interval of about
A : 1/14 seconds
B : 1/3 seconds
C : 1/7 seconds
D : 1/19 seconds
Q.no 60. The name given to the unit of sound absorption is-
A : decibel
B : degree
C : sabine
D : watt
Answer for Question No 1. is b
Answer for Question No 2. is c
Answer for Question No 3. is b
Answer for Question No 4. is c
Answer for Question No 5. is a
Answer for Question No 6. is a
Answer for Question No 7. is c
Answer for Question No 8. is b
Answer for Question No 9. is d
Answer for Question No 10. is c
Answer for Question No 11. is b
Answer for Question No 12. is d
Answer for Question No 13. is a
Answer for Question No 14. is c
Answer for Question No 15. is b
Answer for Question No 16. is c
Answer for Question No 17. is b
Answer for Question No 18. is c
Answer for Question No 19. is c
Answer for Question No 20. is b
Answer for Question No 21. is a
Answer for Question No 22. is b
Answer for Question No 23. is b
Answer for Question No 24. is d
Answer for Question No 25. is b
Answer for Question No 26. is b
Answer for Question No 27. is b
Answer for Question No 28. is a
Answer for Question No 29. is a
Answer for Question No 30. is a
Answer for Question No 31. is b
Answer for Question No 32. is d
Answer for Question No 33. is a
Answer for Question No 34. is d
Answer for Question No 35. is d
Answer for Question No 36. is b
Answer for Question No 37. is a
Answer for Question No 38. is b
Answer for Question No 39. is a
Answer for Question No 40. is d
Answer for Question No 41. is a
Answer for Question No 42. is a
Answer for Question No 43. is c
Answer for Question No 44. is d
Answer for Question No 45. is a
Answer for Question No 46. is a
Answer for Question No 47. is d
Answer for Question No 48. is a
Answer for Question No 49. is b
Answer for Question No 50. is c
Answer for Question No 51. is c
Answer for Question No 52. is a
Answer for Question No 53. is a
Answer for Question No 54. is b
Answer for Question No 55. is b
Answer for Question No 56. is c
Answer for Question No 57. is d
Answer for Question No 58. is d
Answer for Question No 59. is c
Answer for Question No 60. is c
Seat No -
Total number of questions : 60
1000499 T1 ENGINEERING PHYSICS
Time : 1hr
Max Marks : 50
N.B
1) All questions are Multiple Choice Questions having single correct option.
2) Attempt any 50 questions out of 60.
3) Use of calculator is allowed.
4) Each question carries 1 Mark.
5) Specially abled students are allowed 20 minutes extra for examination.
6) Do not use pencils to darken answer.
7) Use only black/blue ball point pen to darken the appropriate circle.
8) No change will be allowed once the answer is marked on OMR Sheet.
9) Rough work shall not be done on OMR sheet or on question paper.
10) Darken ONLY ONE CIRCLE for each answer.
Q.no 1. The normalization condition indicates that probabilities of finding the particle
A : in a small volume summed up over the entire space must give 1
B : in a small volume must give 1
C : in a small volume summed up along the positive direction must give 1
D : in a small volume summed up along the negative direction must give 1
Q.no 2. In the Fresnel diffraction the incident wave front is
A : Spherical
B : Cylindrical
C : Spherical or cylindrical
D : Plane
Q.no 3. Fringe width is defined as the distance between two consecutive
A : Crests
B : Bright fringes only
C : Dark fringes only
D : Bright or dark fringes
Q.no 4. _________ superconductors are also called soft superconductors
A : Type I
B : Type II
C : Type III
D : Type IV
Q.no 5. In a narrow wave packet of matter wave
A : The position of the particle cannot be determined accurately
B : The momentum of the particle cannot be determined accurately
C : Concept of wave group does not exist
D : Phase velocity is always zero
Q.no 6. When the size of the material is reduced to size in nano region, the energy band structure undergo______________which mainly accounts for the change in the properties of nanoparticles
A : Small variations
B : large variations
C : Splitting
D : scattering
Q.no 7. The points of constructive interference of light are
A : May be bright or dark
B : Always bright
C : Always dark
D : Neighter bight nor dark
Q.no 8. The temperature at which conductivity of material becomes infinite is called.
A : Critical temperature
B : absolute temperature
C : Mean temperature
D : Crystallization temperature
Q.no 9. De Broglie wave is expresssed in terms of Ψ. What is Ψ?
A : It is the energy of particles producing matter waves
B : It is the momentum of particles producing matter waves
C : It is the uncertainity in position of particles producing matter waves
D : It represents the oscillations of quantity that produces matter waves.
Q.no 10. Pumping process used in diode laser is
A : optical pumping
B : forward biased voltage
C : electrical discharge
D : none of these
Q.no 11. The battery connection required to forward bias a p-n junction are
A : +ve terminal to p and —ve terminal to n
B : -ve terminal to p and —ve terminal to n
C : -ve terminal to p and +ve terminal to n
D : none of the above
Q.no 12. Bending of light around the straight edge of obstacle and spreading into its geometrical shadow is called as
A : Diffraction
B : Interference
C : Polarization
D : Dispersion
Q.no 13. When the size of the material reduces, the surface area to volume ratio ________
A : decreases
B : Increases
C : remains same
D : becomes exactly equal to the volume
Q.no 14. Laevo-rotatory optically active substance rotates the plane of vibrations
A : In clockwise direction
B : In left hand side
C : By 1800
D : None of the above
Q.no 15. Laser action is possible only if there is
A : a set of reflecting mirrors
B : a black body
C : population inversion
D : oscillations of laser source
Q.no 16. The intensity of central bright band in the case of diffraction is
A : maximum
B : minimum
C : varies between max to min
D : none of above
Q.no 17. For an infinitely deep 1 dimentional potential well, a quantum particle in the ground state is likely to be found
A : at one corner of the well
B : At 1/4th and 3/4th distance from one end of the well
C : At every point in the well with equal probability
D : At the center of the well
Q.no 18. piezoelectric effect has been observed in
A : nickel
B : glass
C : quartz
D : mica
Q.no 19. Superconductivity was first observed by
A : Volta
B : Meissner
C : Kamerling Onnes
D : Schrieffer
Q.no 20. ln Magnetostriction Oscillator
A : a copper rod is used
B : a nickel rod is used
C : a magnesium rod is used
D : an aluminium rod is used
Q.no 21. When the temperature of n- type semiconductor is increased
A : net negative charge increases
B : minority carriers decreases
C : electron-hole pairs increases
D : none of the above
Q.no 22. The intensity level expressed in a unit
A : bel
B : 10-12W/m2
C : Newton
D : db/m
Q.no 23. In Fraunhoffer diffraction distance of slit from source and screen is
A : finite
B : infinite
C : parallel
D : not equal
Q.no 24. The current in a superconductor produces
A : zero, voltage drop across it
B : a strong, electric field around it
C : a small voltage drop across it
D : a large voltage drop across it
Q.no 25. According to de Broglie hypothesis equation λ=h/p is applicable for
A : Matter particle only
B : Photons only
C : Both matter particle and photon
D : All options are correct
Q.no 26. For the Solar cell the ratio of maximum power delivered to ideal power is called as
A : Efficiency
B : Fill factor
C : short-circuit
D : Open-circuit
Q.no 27. Current once initiated in a superconducting ring can continue to flow infinitely without any power losses
Is called
Is called
A : Infinite current
B : Critical current
C : Persistent current
D : induced current
Q.no 28. Types - l superconductors are ___________ temperature superconductor.
A : low
B : absolute
C : High
D : None of the Above
Q.no 29. The active medium of a helium-neon laser is made up with ________ ratio of helium-neon.
A : 10:1
B : 10:3
C : 10:5
D : 10:6
Q.no 30. In Newton’s ring experiment if the air film is replaced by water film, then the diameter of the ring
A : Decreases
B : Increases
C : Remains same
D : None of the above
Q.no 31. If the gap between plano- convex lens and plane glass plate filled with the liquid instead of air then
A : Diameter of rings increases
B : Diameter of rings decreases
C : Diameter of rings does not change
D : All above are correct
Q.no 32. Heisenberg Uncertainty Principle is significant for subatomic particles because
A : Their energy is small
B : They show wave particle duality
C : Their velocity is small
D : They show photoelectric effect
Q.no 33. The minimum amount of current passed through the body of superconducter in order of destroy the superconductivity is called.
A : induced current
B : Critical current
C : Eddy current
D : super current
Q.no 34. In the P-type semiconductor, the hole concentration in valence band is----------- than the electron concentration in conduction band.
A : less than
B : greater than
C : equal to
D : all of these
Q.no 35. The impurity level in an extrinsic semiconductor is about of pure semiconductor
A : 10 atoms for 103 atoms
B : 10 atoms for 102 atoms
C : 1 atoms for 108 atoms
D : 1 atoms for 100 atom
Q.no 36. The walls of the hall built for music concerns should
A : Amplify sound
B : Reflect sound
C : Transmit sound
D : D Absorb sound
Q.no 37. In Newton's rings the central spot is
A : Always bright
B : Always dark
C : Can be bright or dark
D : Of blue colour
Q.no 38. The characteristics of laser beam are
A : Highly directional
B : Highly intense
C : Highly monochromatic
D : All of these
Q.no 39. __________ are used in sunscreen lotions to protect the skin from ultraviolet radiations
A : Zinc oxide and Titanium oxide nanoparticles
B : Talcum stone particles
C : Non-metal nanoparticles
D : Quantum dots
Q.no 40. To check the optical flatness of the surface in wedge-shape thin film fringe-width must be
A : Equal, straight
B : Unequal, straight
C : Unequal, curved
D : Equal, curved
Q.no 41. Quantum mechanically, minimum energy of a particle enclosed in a potential well cannot be
A : 1 eV
B : zero
C : 100 eV
D : 1 KeV
Q.no 42. The light source used for optical pumping in Ruby laser is
A : Xenon
B : Argon
C : Neon
D : none of the above
Q.no 43. Which of the following will remain unchanged when a sound wave travels in air or in water?
A : Amplitude
B : frequency
C : wavelength
D : Speed
Q.no 44. We prefer Polaroid sunglasses because they
A : have soothing colours
B : reduce the intensity of light
C : are cheaper
D : can change colour
Q.no 45. In a semiconductor, current conduction is due to
A : only holes
B : both holes and free electrons
C : only free electrons
D : none of the above
Q.no 46. The phenomena of the echo is used to measure the
A : length of metal
B : flaws in metal
C : transfer signals
D : none
Q.no 47. Which is the correct relation for forbidden energy gap in conductor, semi-conductor and insulator?
A : ΔEg conductor > ΔEg semiconductor> ΔEginsulator
B : ΔEgconductor > ΔEginsulator > Δ Eg semiconductor
C : ΔEginsulator > Δ Eg semiconductor > ΔEgconductor
D : ΔEg semiconductor > Δ Egconductor > ΔEginsulator
Q.no 48. The Cooper pairs are electron pairs with
A : equal and same momentum
B : Unequal & same spin
C : Equal and opposite momentum and spin
D : Unequal & opposite spin and momentum
Q.no 49. Reverse bias applied on a junction diode-----------
A : raises the potential barrier
B : decrease the minority carrier current
C : increases the majority carrier current
D : lowers the potential barrier
Q.no 50. According to de Broglie hypothesis
A : A particle in rest has matter waves associated with it
B : A particle at rest or in motion has matter wave associated with it
C : A particle in motion has matter wave associated with it
D : All above statements are correct
Q.no 51. Optimum reverberation time for music is
A : 0.5 sec
B : 0.1lsec
C : l.2sec
D : Above 5 sec
Q.no 52. On reverse biasing the P-N junction,its depletion region becomes
A : narrow
B : zero
C : broad
D : constant
Q.no 53. Matter waves would be more significant for particles having mass
A : About 10 x 103 g
B : About 10 x 10-14 g
C : About 10 x 1014 g
D : About 10 x 10 -28 g
Q.no 54. In Newton’s ring experiment ,with air as a medium between Plano convex lens and glass plate, diameter of nth dark ring is
A : √4nrλ
B : √4nr
C : √(2n-1)2rλ
D : √4nr/λ
Q.no 55. If ne & nh are the number of electrons & holes in a semiconductor heavily doped with phosphorus, then
A : ne»nh
B : ne <nh
C : ne«nh
D : ne =nh
Q.no 56. The reverberation time is the time required for the intensity to drop by
A : 30dB
B : 90dB
C : C 60dB
D : 120dB
Q.no 57. The basic principle of holography is
A : to create the interference pattern of object wave only
B : to create the interference pattern of reference wave only
C : to create the interference pattern of object wave and reference wave
D : none of the above
Q.no 58. The concept of wave function is insufficient to tell about probability of particle because
A : Wave function is negative at places of negative amplitude. Thus probability would come out to be negative which is meaningless.
B : Wave function is not single valued
C : Wave function is continuous. Ψ could have been considered as the sufficient function if it had been discontinuous.
D : Wave function directlty gives the uncertainty in position and not the probability.
Q.no 59. An echo is heard when direct sound waves coming from the source and its reflected wave reach the listener with a time interval of about
A : 1/14 seconds
B : 1/3 seconds
C : 1/7 seconds
D : 1/19 seconds
Q.no 60. Intensity at any point on the screen at angle Ѳ for Fraunhoffer single slit is given by I
A : (n/2)π
B : Im(sinα/α)2
C : sin-1(nλ/a)
D : (sinα/α)2
Answer for Question No 1. is a
Answer for Question No 2. is a
Answer for Question No 3. is d
Answer for Question No 4. is a
Answer for Question No 5. is b
Answer for Question No 6. is b
Answer for Question No 7. is b
Answer for Question No 8. is a
Answer for Question No 9. is d
Answer for Question No 10. is b
Answer for Question No 11. is a
Answer for Question No 12. is a
Answer for Question No 13. is b
Answer for Question No 14. is b
Answer for Question No 15. is c
Answer for Question No 16. is a
Answer for Question No 17. is d
Answer for Question No 18. is c
Answer for Question No 19. is a
Answer for Question No 20. is b
Answer for Question No 21. is c
Answer for Question No 22. is a
Answer for Question No 23. is b
Answer for Question No 24. is a
Answer for Question No 25. is c
Answer for Question No 26. is b
Answer for Question No 27. is c
Answer for Question No 28. is a
Answer for Question No 29. is a
Answer for Question No 30. is a
Answer for Question No 31. is b
Answer for Question No 32. is b
Answer for Question No 33. is b
Answer for Question No 34. is b
Answer for Question No 35. is c
Answer for Question No 36. is d
Answer for Question No 37. is b
Answer for Question No 38. is d
Answer for Question No 39. is a
Answer for Question No 40. is a
Answer for Question No 41. is b
Answer for Question No 42. is a
Answer for Question No 43. is b
Answer for Question No 44. is b
Answer for Question No 45. is c
Answer for Question No 46. is b
Answer for Question No 47. is c
Answer for Question No 48. is c
Answer for Question No 49. is a
Answer for Question No 50. is c
Answer for Question No 51. is c
Answer for Question No 52. is c
Answer for Question No 53. is d
Answer for Question No 54. is a
Answer for Question No 55. is a
Answer for Question No 56. is c
Answer for Question No 57. is c
Answer for Question No 58. is a
Answer for Question No 59. is c
Answer for Question No 60. is b
Comments
Post a Comment