write down their expression for the power of an electrical device. what is it unit?????
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Explanation:
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The rate at which electric energy is dissipated
or consumed in an electric circuit is called
electric power. It's Sl unit is Watt (W).
power = work done / time taken
we know that work done by current | when it flows for time T under potential difference V is
given by :
W = V*I*T joules
so, power = V*I*T / T joules per second Power, P = V*| joules per second or watt
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