Question

When an AC voltage of $220V$ is applied to the capacitor then

• A. The maximum voltage between plates is $220V$
• B. The current is in phase with the applied voltage
• C. The charge on the plate is not in phase with the applied voltage
• D. Power delivered to the capacitor per cycle is zero

Answer 1

Answer: (C), (D)

Power delivered to the capacitor per cycle is zero
The charge on the plate is not in phase with the applied voltage

When an ac voltage of 220 V is applied to a
capacitor C , the charge on the plates is in phase with the
applied voltage .
As the circuit is pure capacitive so , the current developed
leads the applied voltage by a phase angle of ${90}^{\circ }$ Hence ,
power delivered to the capacitor per cycle is
$P=V_{rms}{I}_{rms}\cos {90}^{\circ }=0$