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(D) The average power dissipated in an $AC$ circuit is given by the formula $P = V_{rms} I_{rms} \cos \phi$,where $\phi$ is the phase difference betwe

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Zero

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(D) The average power dissipated in an $AC$ circuit is given by the formula $P = V_{rms} I_{rms} \cos \phi$,where $\phi$ is the phase difference between voltage and current.In a pure capacitive circuit,the current leads the voltage by a phase angle of $\phi = 90^\circ$ (or $\pi/2$ radians).The power factor is $\cos \phi = \cos 90^\circ = 0$.Substituting this into the power formula,we get $P = V_{rms} I_{rms} 	imes 0 = 0$.Therefore,the average power dissipation in a pure capacitor is zero.

The average power dissipation in a pure capacitance in an $AC$ circuit is

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