physics MCQs – Page 5

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 Review each marked answer and report any item that may be outdated or unclear.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
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