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Watt Hour Meter

The expressio...

Question

The expression of electric power $(P) =$

I R^{2}

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V I

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I R

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V R^{2}

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Solution

The correct option is B $V I$
Power is the rate at which work is done. It is the work/time ratio.
So, $P o w e r = \frac{W o r k}{T i m e}, T h a t i s, P = \frac{W}{T}$ .

The expression for work is $W o r k = F o r c e \times D i s p l a c e m e n t . T h a t i s, W = F \times s .$ , and so the expression for power can be rewritten as $P = \frac{F \times s}{t} .$

Hence, in the given expression, the symbols F and s represent Force and displacement.

$P = \frac{V I t}{t} = V I$ .

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Similar questions

Mathematical expression for electric power(P), where $I$ is current and $R$ is resistance, is;

I^{2} R

I R^{2}

\frac{V^{2}}{R}

V \times x

x

\frac{Q \times V}{t}

Q

V

A (3, 3)

B (6, 2)

I R^{2}

P

\leftarrow \to A B

A P = 4 A B

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