Question

When an AC voltage of 220 V is applied to the capacitor C ______.

विकल्प

• the maximum voltage between plates is 220 V.

• the current is in phase with the applied voltage.

• the charge on the plates is in phase with the applied voltage.

• power delivered to the capacitor is zero.

Answer 1

When an AC voltage of 220 V is applied to the capacitor C the charge on the plates is in phase with the applied voltage, and power delivered to the capacitor is zero.

Explanation:

Applied Voltage, E = E₀ sin ωt

Charge on it, Q = CE₀ sin ωt

So, charge on the plates is in phase with the applied voltage.

Power applied to a circuit is P_avg = V_rms I_rms cos Φ

Since, for capacitive circuit Φ = 90°

Then, P_avg = Power delivered = zero.