Physics GK in English Quiz 8

1. Which of the following is the correct statement? For an open circuit, the value of load

A.would be infinite

B.would be zero

C.depends on the voltage of the source

D.depends on other components of the circuits

2. A lens, immersed in a liquid, becomes invisible when

A.the focal length of the lens is zero

B.the focal length of the lens is infinite

C.the refractive index of the lens is less than the refractive index of the liquid

D.the refractive index of the lens is equal to the refractive index of the liquid

3. Nuclear sizes are expressed in a unit named

A.Fermi

B.Angstrom

C.Newton

D.Tesla

4. When a ship floats on water

A. the weight of water displaced is more than that of the ship

B.the weight of water displaced is less than that of the ship

C.the weight of water displaced equals that of the ship

D.it displaces no water

5. One nanometer is equal to _____________ meters.

A.10 raised to the power (3)

B.10 raised to the power (6)

C.10 raised to the power (9)

D.10 raised to the power (12)

6. Perspiration is maximum when

A. temp is high and air is dry

B.temp is high and air is humid

C.temp is low and air is humid

D.temp is low and air is dry

7. What was invented by J. B. Dunlop?

A.Airplane

B.Car

C.Rubber

D.Rubber

8. The velocity of sound produced by a vibrating bodyvaries

A.directly as the density of the medium

B.inversely as the density of the medium

C.directly as the frequency of the medium

D.inversely as the frequency of the medium

9. The time taken by light to travel from the Sun to the Earth is

A.15.2 min

B.8.33 min

C.4.66 min

D.1.5 min

10. An electric iron of 750 W is operated at 250 volts. Its current rating is

A.3A

B.5A

C.7A

D.10A