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#9 | Power
(Physics) > Work,Energy and Power
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Related Practice Questions :

A body starts moving from rest in straight line under a constant power source. Its displacement in time t is proportional to

(1) ${t}^{1/2}$

(2) t

(3) ${t}^{3/2}$

(4) ${t}^{2}$

High Yielding Test Series + Question Bank - NEET 2020

Difficulty Level:

The relation between velocity (v) and time (t) is $v\propto \sqrt{\mathrm{t}}$, then which one of the following quantity is constant?

1.  Force

2.  Power

3.  Momentum

4.  Kinetic Energy

High Yielding Test Series + Question Bank - NEET 2020

Difficulty Level:

A force F is applied on a body which moves with a velocity v in the direction of the force, then the power will be

1.  ${\mathrm{Fv}}^{2}$

2.  Fv

3.  $\mathrm{F}/{\mathrm{v}}^{2}$

4.  F/v

High Yielding Test Series + Question Bank - NEET 2020

Difficulty Level:

An ice cream has a marked value of 700 kcal. How many kilowatt- hour of energy will it deliver to the body as it is digested

(1) 0.81 kWh

(2) 0.90 kWh

(3) 1.11 kWh

(4) 0.71 kWh

High Yielding Test Series + Question Bank - NEET 2020

Difficulty Level:

A body of mass m accelerates uniformly from rest to v1 in time t1. As a function of time t, the instantaneous power delivered to the body is

(1) $\frac{m{v}_{1}t}{{t}_{1}}$

(2) $\frac{m{v}_{1}^{2}t}{{t}_{1}}$

(3) $\frac{m{v}_{1}{t}^{2}}{{t}_{1}}$

(4) $\frac{m{v}_{1}^{2}t}{{t}_{1}^{2}}$