physics MCQs – Page 4

Practise multiple-choice questions from physics for competitive examinations and subject revision. Review each marked answer and report any item that may be outdated or unclear.

physics Mcqs
61. During long jump, athlete runs before taking the jump. By doing so he__________________?
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A. decreases his momentum

B. provide him a larger inertia

C. increases his momentum

D. decreases his inertia

62. In double slit experiment if one of the two slit is covered then________________?
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A. no interference fringes are observed

B. interference pattern not disturbed

C. no diffraction fringes are observed

D. no fringes observed

63. When crest of one wave falls over the trough of the other wave this phenomenon is known as________________?
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A. polarization

B. diffraction

C. constructive interference

D. destructive interference
64. An electric iron is marked 20 volts 500W. The units consumed by it in using if for 24 hours will be______________?
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A. 24

B. 1100

C. 5

D. 12
65. In Young double slit experiment, if white light is used____________________?
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A. coloured fringes will be seen

B. alternate dark and bright fringes will be seen

C. no interference fringes will be seen

D. impossible to predict

66. The trajectory (or path) of a projectile is_________________?
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A. straight line

B. circle

C. parabola

D. hyperbola

67. When same current passes for same time through a thick and thin wire_________________?
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A. less heat is produced in thick wire

B. more heat is produced in thick wire

C. more heat is produced in thin wire

D. no heat is produced in wire

68. What is the angle of projection for which the range and maximum height become equal ?
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A. tan-1 2

B. tan-1

C. tan-1

D. tan-1 4
69. Circuit which gives continuously varying potential is called _______________________?
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A. wheat stone bridge

B. all of above

C. complex network

D. potential divider
70. It is possible to distinguish between transverse and longitudinal waves form the property of __________________?
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A. polarization

B. diffraction

C. refraction

D. interference

71. The velocity of sound is greatest in___________________?
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A. ammonia

B. Water

C. air

D. copper
72. The distance between any two consecutive crests or troughs is called____________________?
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A. Wave length

B. frequency

C. phase difference

D. period

73. In the following figure, the terminal potential is ___________________ ?
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A. 12V

B. 36V

C. 2V

D. zero
74. On loading the prong of a tuning form with wax its frequency____________________?
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A. decreases

B. may increase or decrease

C. increases

D. remains unchanged

75. Slope of velocity time graph is_____________________?
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A. distance

B. force

C. acceleration

D. momentum

76. A light ray traveling form rarer to denser medium suffers a phase change of__________________?
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A. 180

B. 45

C. 90

D. 60

77. Which one is the correct relation for fundamental frequency of open and closed pipe ?
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A. fopen = fclosed

B. fopen = 2 fclosed

C. fclosed = 2fopen

D. fopen = 1 / f closed

78. Which phenomena can be applied to estimate the velocity of star with respect to earth ___________________?
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A. Beats phenomena

B. Interference of waves

C. All of these

D. Dopplers effect
79. At which angle the range of the projectile is maximum____________________?
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A. none

B. 45

C. 60

D. 30

80. Resistance of a wire on increasing its temperature will_________________?
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A. decrease with rise in temperature

B. will remain same

C. increase with rise in temperature

D. depends upon altitude of experimentation