Physics General Knowledge Online Practice Tests - ObjectiveBooks
Physics General Knowledge Online Practice Tests

Physics General Knowledge Online Practice Tests

GK Practice Test: Question Set - 14

1. For seeing objects at the surface of water from a submarine under water, the instrument used is
    (A) Kaleidoscope
    (B) Periscope
    (C) Spectroscope
    (D) Telescope
2. If speed of rotation of the earth increases, weight of the body
    (A) Increases
    (B) Remains unchanged
    (C) Decreases
    (D) May decrease or increase
3. The largest planet of the solar system is
    (A) Earth
    (B) Mars
    (C) Jupiter
    (D) Saturn
4. Which is the closest planet to Sun?
    (A) Mars
    (B) Venus
    (C) Jupiter
    (D) Mercury
5. What is the instrument that determines specific gravity of liquids?
    (A) Hygrometer
    (B) Hydrometer
    (C) Gravimeter
    (D) Hypsometer
6. Primitive man first learnt
    (A) To make fire
    (B) To tame animals
    (C) To make a wheel
    (D) To grow grain
7. Solar Cell converts
    (A) Light energy into heat energy
    (B) Solar energy into electrical energy
    (C) Solar energy into sound energy
    (D) Solar energy into heat energy
8. The image formed on the retina of the eye is
    (A) Real and Inverted
    (B) Upright and Real
    (C) Virtual and Upright
    (D) Enlarged and Real
9. The blue colour of the water in the sea is due to
    (A) Refraction of the blue light by the impurities in sea water
    (B) Reflection of blue sky by the sea water
    (C) Absorption of other colors except the blue colour by water molecules
    (D) Scattering of blue light by water molecules
10. The oil in the wick of a lamp rises up due to
    (A) Pressure difference
    (B) Low viscosity of oil
    (C) Capillary action
    (D) Gravitational force
11. Food is cooked in a pressure cooker quickly because
    (A) Boiling point of water decreases
    (B) Boiling point of water increases
    (C) It absorbs heat quickly
    (D) It retains heat for a longer duration
12. A glass tumbler containing ice shows droplets of water on the outer surface because
    (A) The outer surface of the tumbler shows hygroscopic effect
    (B) The moisture in the air on coming in contact with the cold surface of the tumbler condenses in the form of droplets of water
    (C) Water from inside oozes out through minute porous wall of the tumbler
    (D) Both (A) and (C)
13. The sky appears blue because
    (A) It is actually blue
    (B) The atmosphere scatters blue light more than the others
    (C) All colors interface to produce blue
    (D) In white light, blue colour dominates
14. A thick glass tumbler cracks more easily than a thin one when hot water is poured into it. Why?
    (A) Thick glass is more brittle than thin glass.
    (B) Thick glass is of inferior quality.
    (C) The inner surface of the tumbler expands more than its outer surface.
    (D) The outer surface of the tumbler expands more than its inner surface.
15. In the visible spectrum, the colour having the shortest wavelength is
    (A) Green
    (B) Yellow
    (C) Violet
    (D) Blue
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