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Define electric power. A device of resis...

Define electric power. A device of resistance R is connected across a source of V voltage and draws a current I. Derive an expression for power in terms of voltage and resistance.

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Rate at which electric energy is dissipated in an electric circuit.
`P=(V.Q)/(t) = V.I =Vxx(V)/(R) = (V^(2))/(R)`
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