question_answer

A small signal voltage \[V(t)\text{ }=\text{ }{{V}_{0}}\,\sin \omega t\] is applied across an ideal capacitor C

A)  Current \[I(t),\] lags voltage \[V\left( t \right)\] by \[{{90}^{o}}\].

B)  Over a full cycle the capacitor C does not consume any energy from the voltage source.

C)  Current \[I(t)\] is in phase with voltage \[V(t)\].

D)  Current \[I(t)\] leads voltage \[V(t)\] by \[\text{18}{{\text{0}}^{o}}\].

Correct Answer: B

Solution :

[b] power

as                   (Because)

Power consumed = 0 (in one complete cycle)