PHYSICS QUIZ – Jnanlok

Physics Quiz

1 / 10

Mach number is used in connection with the speed of

ships

spacecraft

sound

aircraft

2 / 10

Radiocarbon is produced in the atmosphere as a result of

action of solar radiations particularly cosmic rays on carbon dioxide present in the atmosphere

action of ultraviolet light from the sun on atmospheric oxygen

collision between fast neutrons and nitrogen nuclei present in the atmosphere

lightning discharge in atmosphere

3 / 10

The absorption of ink by blotting paper involves

viscosity of ink

capillary action phenomenon

diffusion of ink through the blotting

siphon action

4 / 10

Rainbow is due to

ionisation of water deposits

absorption of sunlight in minute water droplets

refraction and reflection of sunlight by water droplets

diffusion of sunlight through water droplets

5 / 10

On a stationary sail boat, air is blown from a fan attached to the boat. The boat

spins around

moves in the same direction in which air blows

moves in opposite direction in which the air is blown

does not move

6 / 10

Supersonic plane fly with the speed

less than the speed of sound

of sound

of light

greater than the speed of sound

7 / 10

Nuclear sizes are expressed in a unit named

tesla

newton

Fermi

angstrom

8 / 10

It is easier to roll a stone up a sloping road than to lift it vertical upwards because

work done in rolling is more than in lifting

work done in rolling a stone is less than in lifting it

work done in lifting the stone is equal to rolling it

work done in both is same but the rate of doing work is less in rolling

9 / 10

Large transformers, when used for some time, become very hot and are cooled by circulating oil. The heating of the transformer is due to

hysteresis loss alone

both the heating effect of current and hysteresis loss

the heating effect of current alone

intense sunlight at noon

10 / 10

Siphon will fail to work if

both its limbs are of unequal length

the level of the liquid in the two vessels are at the same height

the temperature of the liquids in the two vessels are the same

the densities of the liquid in the two vessels are equal

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Average statistical: 30%

Published by jnan lokin