The average power dissipated in a pure induct | vedclass

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(D) The average power dissipated in an $AC$ circuit is given by the formula $ P_{av} = VI \cos \phi $,where $ V $ is the $RMS$ voltage,$ I $ is the $R

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zero

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(D) The average power dissipated in an $AC$ circuit is given by the formula $ P_{av} = VI \cos \phi $,where $ V $ is the $RMS$ voltage,$ I $ is the $RMS$ current,and $ \phi $ is the phase angle between voltage and current.In a pure inductor,the current lags behind the voltage by a phase angle of $ \phi = \pi / 2 $.Substituting this into the power formula: $ P_{av} = VI \cos(\pi / 2) $.Since $ \cos(\pi / 2) = 0 $,we get $ P_{av} = VI 	imes 0 = 0 $.Therefore,the average power dissipated in a pure inductor is zero.

The average power dissipated in a pure inductor is

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