D

In a pure inductor, the power factor is zero because the current lags the voltage by 90 degrees. The average power (C0) dissipated in an AC circuit with a pure inductor is calculated using the formula:
P = V_{rms} I_{rms} imes ext{cos}( heta), where P is the average power, V_{rms} is the root mean square voltage, I_{rms} is the root mean square current, and B8 is the phase difference. Since B8 = 90^, cos(90^) = 0.
Thus, the average power dissipated is:
P = V_{rms} I_{rms} imes 0 = 0.
Therefore, the average power dissipated in a pure inductor when an AC current is passing through it is zero.