Physics - Study Mode

[#711] Metals are good conductors of electricity because:
Correct Answer

(A) They contain free electrons.

Explanation

Solution: Metals are good conductors of electricity because they contain free electrons.

[#712] Let a thin capillary tube be replaced with another tube of insufficient length then, we find water
Correct Answer

(B) will not rise

Explanation

Solution: When length of capillary tube is insufficient then we would observe no rise on level of water because their will be no air pressure created enough to rise the water level.

[#713] Out of the following pairs, choose the pair in which the physical quantities do not have identical dimension?
Correct Answer

(C) Impulse and moment of force

Explanation

Solution: Impulse and moment of force.

[#714] If two bodies of different masses, initially at rest, are acted upon by the same force for the same time, then the both bodies acquire the same:
Correct Answer

(B) Momentum

Explanation

Solution: Since the Force and the duration of time for which it acted are same, the product of force and time will be the same for both. Since Force×time gives change in momentum of a body, and they had 0 momentum initially, their final momenta will be same.

[#715] Pick out the scalar quantity
Correct Answer

(B) Pressure

Explanation

Solution: Pressure is a scalar quantity.