question_answer 37)

  When an AC voltage of 220 V is applied to the capacitor C (a) the maximum voltage between plates is 220V (b) the current is in phase with the applied voltage (c) the charge on the plates is in phase with the applied voltage (d) power delivered to the capacitor is zero

Answer:

                                (c,d)When an a.c. voltage of 220 V is applied to a capacitor C, the charge on the plates is in phase with the applied voltage. As current developed leads the applied voltage by a phase angle of 90°, therefore, power delivered to the capacitor per cycle is = Zero. Choices (c) and (d) are correct.