Question

define electric power. derive relation between power, potential difference and resistance

Answer 1

Electric power is the rate, per unit time, at which electrical energy is transferred by an electric circuit. The SI unit of power is the watt, one joule per Elevtric power is usually produced by electric generators, but can also be supplied by sources such as electric batteries.......

Relation between Power , Pd and Resistance is.. P = V^2 / R ......

where ,
p = power
V = Pd
R = resistance ...

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Answer 2

Answer: Electric power is the rate at which work is done or energy is transformed in an electrical circuit.

Expression

Let the power=work done/time taken

We know that the work done by current l when it flows for time t under potential difference v is given by:

W=V×T×I joules

So

Power=V×T×I joules per second

Power,P=V×I joules per second or watt

Relationship

Electric power is measured in watts

1watt=1joule/1sec

Current and resistance are related by following relation:

V=IR

R is the resistance in the circuit..

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Explanation: