Question

A small signal voltage $V(t )= V_0 \sin \, \omega t$ is applied across an ideal capacitor $C$ :

• A. Over a full cycle the capacitor C does not consume any energy from the voltage source
• B. Current I (t) is in phase with voltage V(t)
• C. Current I(t) leads voltage V(t) by $180^{\circ}$
• D. Current I(t), lags voltage V(t) by $90^{\circ}$

Answer 1

Answer: (A)

In ideal capacitor, I leads from voltage by $90^{\circ}$ and capacitor does not consume energy.