Which of the following statements are correct about power?

It is the rate of change of momentum.

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It is the rate of change of force.

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It is the rate of doing work.

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The S.I. unit of power is watt.

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Solution

The correct option is D The S.I. unit of power is watt.
Power is defined as the rate of doing work.
Mathematically power is expressed as $P o w e r = \frac{W o r k d o n e}{T i m e t a k e n}$
The S.I. unit of power is joule per second, which is equal to watt.

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