Power dissipated by a resistor in an ac circuit derivation
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P=EvIvcosx
where x is the phase difference and we know that phase difference between voltage E and a.c current I in a circuit containing R is 0
therefore x=0
cosx=1
hence, power=EvIv
where x is the phase difference and we know that phase difference between voltage E and a.c current I in a circuit containing R is 0
therefore x=0
cosx=1
hence, power=EvIv
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