Objective Physics General knowledge - Set 08 - ObjectiveBooks

# G.K. Practice Test: Question Set - 08

1. When light passes from air into glass it experiences change of
(A) Frequency and wavelength
(B) Frequency and speed
(C) Wavelength and speed
(D) Frequency, wavelength and speed

2. When a given amount of air is cooled
(A) The amount of moisture it can hold decreases
(B) Its absolute humidity decreases
(C) Its relative humidity remains constant
(D) Its absolute humidity increases

3. When cream is separated from milk
(A) The density of milk increases
(B) The density of milk decreases
(C) The density of milk remains unchanged
(D) It becomes more viscous

4. Weight of an object put in a satellite orbiting in space around the earth is
(A) The same as on the earth
(B) Slightly more than that on the earth
(C) Less than that on the earth
(D) Reduced to zero

5. The three abundant elements in the earth's crust are aluminium, oxygen and silicon. The correct order of their abundance is
(A) Oxygen, aluminium, silicon
(B) Aluminium, silicon, oxygen
(C) Oxygen, silicon, aluminium
(D) Silicon, oxygen, aluminium

6. Out of the following, which is not emitted by radioactive substance?
(A) Electrons
(C) Alpha particles
(D) Neutrons

7. Materials for rain-proof coats and tents owe their water-proof properties to
(A) Surface tension
(B) Viscosity
(C) Specific gravity
(D) Elasticity

8. Pick out the scalar quantity
(A) Force
(B) Pressure
(C) Velocity
(D) Acceleration

9. Of the following natural phenomena, tell which one known in Sanskrit as 'deer's thirst'?
(A) Rainbow
(B) Earthshine
(C) Halo
(D) Mirage

10. On a cold day when a room temperature is 15°C, the metallic cap of a pen becomes much colder than its plastic body, though both are at the same temperature of 15°C, because
(A) Metals have higher thermal capacity than plastics
(B) Plastics have a lower density than metals
(C) Metals are good conductor of heat
(D) Plastics have a higher thermal conductivity than metals

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