Physics Multiple Choice Questions
1. The blue color of the sky is due to
a) Diffraction of light
b) Dispersion of light
c) Reflection of light
d) Refraction of light
2. The three law of planetary motion are given by
a) Aristole
b) Kepler
c) Copernicus
d) Tycho Brahe
3. An insect can run along the surface of the pond without wetting its feet.
a) Viscosity
b) Pascal’s law
c) Surface Tension
d) Capillary action
4. Moment of inertia of a body depends upon
a) Its mass
b) Axis of rotation of the body
c) Mass of the body and axis of rotation of the body
d) None of the above
5. The hot air balloon rises because it is
a) Denser
b) Less dense
c) Equally dense
d) None of the above
6. To an astronaut in space, the sky will appear
a) blue
b) white
c) red
d) black
7. The colors in a rainbow are produced due to
a) Interference of light waves reflected by water drops in the air
b) diffraction of light waves
c) dispersion and total internal reflection of sunlight by water drops in the air
d) all of the above
8. A periscope is an instrument used for
a) finding the focal length of a lens
b)seeing very distant objects
c) seeing very small objects
d) viewing objects out of the line of vision
9. A black hole absorbs
a) All radiation
b) all radiation except those in the visible region
c) all radiation except X rays
d) all radiation except microwaves and X rays
10. Newton’s law of gravitation applies to
a) Small bodies only
b) Planets only
c) Both small and big bodies
d) is valid within the solar system only
11. 1 kWh is equal to:
a) 36 x 10 6 J
b) 3.6 x 10 6 J
c) 3600 J
d) 36000 J
12. Wave nature of electron was first experimentally verified by
a) Einstein
b)Huygens
c) Davisson and Germer
d) Rayleigh
13. Ozone layer situated in which layer of the atmosphere:
a) Stratosphere
b) Mesophere
c) Tropospere
d) Ionosphere
14. The ability of an optical instrument to produce separate images of two objects clearly is
a) Limits of resolution
b)Magnification
c) Resolving power
d) Polarisation
15. The source of energy in stars is due to
a) Nuclear fission
b) Nuclear fusion
c) Radioactive disintegration
d) Chain reaction
16. 1 curie is equal to
a) 3.7 x 10 10 dis/sec
b) 10 6 dis/sec
c) 37 x 10 10 dis/sec
d) 37 x 106 dis/sec
17. Which is used in voltage regular circuit?
a) Photo diode
b) p-n junction diode
c) Zener diode
d) Solar cell
18. Which is the correct relation for stress?
a)Force/Area
b) Force/Length
c) Force/Displacement
d) Force/Velocity
19. The gravitational field intensity is maximum at the
a) poles
b)Equator
c) center of the earth
d) region above the atmosphere
20. Slope of the velocity time graph gives:
a) Acceleration
b) Displacement
c) Area
d) Instantaneous velocity
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Answers:
1- b, 2-b, 3-c, 4-c, 5-b, 6-d, 7-c, 8-d, 9-b,10-c
11-b, 12-c, 13-a, 14-c, 15-b, 16-a, 17-c, 18-a, 19-b, 20-a
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