A small signal voltage V t = V 0 sin ⁡ ω t is applied across an ideal capacitor C :

Question

A small signal voltage V t = V 0 sin ⁡ ω t is applied across an ideal capacitor C :, Current I(t), lags voltage V(t) by 90 o, Over a full cycle the capacitor C does not consume any energy from the voltage source, Current I(t) is in phase with voltage V(t)., Current I(t) leads voltage V(t) by 180 o

MARKS App · Accepted Answer

In capacitor current leads the voltage by ϕ = π 2 phase. Average power dissipated in AC circuit is given by P a v = V r m s I r m s cos ϕ In capacitor ϕ = π 2 so cos π 2 is zero.

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