Physics GK in English Quiz 7

1. The device employed to convert electrical energy into mechanical energy is

A.Dynamo

B.Motor

C.Voltmeter

D.Galvanometer

2. Although fog consists of fine drops of water, we cannot see clearly through it because

A.the light rays undergo total internal reflection in the drops

B.fine drops of water in fog polarise light

C.the fine drops are opaque to light

D.the drops scatter most of the light

3. What is inertia?

A.Tendency to resist change in the current state

B.Tendency to impart acceleration to a body

C.Tendency to bring a body to rest

D.Tendency to change its current state

4. Acceleration due to gravity on a planet decreases with .

A.decrease in radius of the planet

B.increase in mass of the planet

C.decrease in mass of the body

D.increase in altitude from surface of the planet

5. Light year represents

A.velocity

B.time

C.distance

D.acceleration

6. Our Earth while it revolves round the Sun, moves in one hour, a distance of _____is approximately covered

A.100,000 km

B.10,000 km

C.10,000 km

D.1000 miles

7. A transverse wave travel along Z – axis. The particles of the medium must move along

A.Z – axis

B.X – axis

C. Y – axis

D.in X-Y plane

8. Which one of the following is an insulator?

A.Copper

B.Wood

C.Mercury

D.Aluminium

9. On a cold day when a room temperature is 15oC, the metallic cap of a pen becomes much colder than its plastic body, though both are at the same temperature of 15oC, 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

10. The process in which a solid gets directly converted into gaseous state without passing through the intermediate liquid state is known as

A.Evaporation

B.Sedimentation

C.Sublimation

D. None of these