physics Mcqs
51. Which of the following pair has same direction always ?
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A. force, momentum

B. force, acceleration

C. force, displacement

D. force, velocity

52. The graphical representation of Ohms law is___________________?
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A. ellipse

B. hyperbola

C. parabola

D. straight line
53. The locus of all points in a medium having the same phase of vibration is called____________________?
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A. wavelength

B. wave front

C. crest

D. trough

54. Ultrasonic have__________________?
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A. all of above

B. frequency in the audible range

C. frequency lower than 20 Hz

D. frequency is greater than 20 kHz
55. How much heat does a 40 W bulb generates in one hour ?
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A. 1.44J

B. 14J

C. 144J

D. 144000J
56. If 1 ampere current flows through 2m long conductor the charge flow through it in 1 hour will be_______________?
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A. 3600C

B. 2C

C. 7200C

D. 1C

57. Wavelength of X-rays falling at glancing angle of 30? on a crystal with atmic spacing 2 x 10-10 for the fist order diffraction is________________?
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A. 2010-10m

B. 4 x 10-10 m

C. 0.0210-10m

D. 2 x 10-10 m
58. A simple pendulum has a bob of mass m and its frequency is f. If we replaced the bob with a heavier one say of 2m then that will be its new frequency ?
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A. 1/2f

B. 2f

C. frequency lower than 20 Hz

D. 1/4f

59. Waves transmit ________________ from one place to another?
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A. energy

B. mass

C. both

D. none

60. Area under velocity time graph represent_____________________?
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A. force

B. displacement

C. acceleration

D. distance

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

81. The unit of coefficient of linear expansion or volume expansion is__________?
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A. K -2

B. K

C. K-1

D. none

82. According to Newton sound travel in air under the conditions of_____________________?
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A. isothermal

B. isobaric

C. isochoric

D. adiabatic

83. Reciprocal of resistivity is called__________________?
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A. resistance

B. flexibility

C. inductance

D. conductivity
84. The__________branch of Physics deals with nuclear particles such as neutrons, protons and nuclear?
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A. structure is called

B. Particle Physics

C. Solid State Physics

D. Plasma Physics

E. Nuclear Physics
85. The physics of moving charge particles is known as__________?
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A. Electro-dynamics

B. Electro-statics

C. Electro-magnetic

D. Plasma physics

86. In monochromatic red light a blue book will probably appear to be_________________?
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A. no scientific reasoning available

B. black

C. green

D. purple

87. There are three bulbs of 60W 100W and 200W which bulb has thickest filament ?
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A. 100W

B. 60W

C. all

D. 200W
88. Electrical energy is converted to heat at the rate of___________________?
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A. I2R

B. IRt

C. I2Rt

D. VIt

89. In open organ pipe___________________?
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A. only even harmonics are present

B. only odd harmonics are present

C. both even and odd harmonics are present

D. selected harmonics are present

90. The distance covered by a body in time t starting from rest is__________________?
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A. a2t/2

B. at2/2

C. at2

D. Vt

91. linear expansion occurs in_________?
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A. solid

B. none

C. both

D. liquid

92. Physics is one of the branches of___________?
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A. Life sciences branch

B. Social science

C. Biological sciences

D. Physical sciences
93. In the shadow of a ball the central portion appears bright that happens due to_________________?
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A. Polarization

B. Diffraction

C. Interference

D. Refraction

94. A fuse is placed in series with the circuit to protect against__________________?
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A. high current

B. high voltage

C. high power

D. over heating
95. The branch of Physics which deals with properties of gravitational?
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A. Optics

B. Hydro dynamic

C. Acoustics

D. Field theory
96. Specific resistance of a wire____________________?
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A. will depend on its length

B. will depend on its radius

C. will depend on the type of material of the wire

D. will depend on none of the above

97. What is the shape of velocity, time graph for constant acceleration ?
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A. inclined curve

B. straight inclined line.

C. parabola

D. declined curve

98. Central spot of Newtons rings __________________?
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A. bright

B. dark for large wavelength

C. dark

D. bright for large wavelength

99. Production of heat due to an electric current flowing through a conductor is given by _________________?
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A. Feed back effect

B. Joule effect

C. Comptons effect

D. Joule Thomsons effect

100. The SI unit of Heat is________?
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A. Volt

B. Newton

C. Joule

D. Watt