Question

When an ac voltage of 220 V is applied to the capacitor C, then

• A. The maximum voltage between plates is 220 V.
• 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: (D)

Power delivered to the capacitor per cycle is Zero

Answer 2

: 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 $90^{o}$Hence, power delivered to the capacitor per cycle is

$P = V_{rms}I_{rms}\cos 90^{o} = 0$