A voltage applied to a circuit drives a current in the circuit

PHYSICS · Subjective · CBSE · Physics · Alternating Current · Alternating Current

Problem

A voltage

v = v_0 \sin \omega t

applied to a circuit drives a current

i = i_0 \sin (\omega t + \phi)

in the circuit. The average power consumed in the circuit over a cycle is (A) Zero (B)

i_0 v_0 \cos \phi

(C)

\frac{i_0 v_0}{2}

(D)

\frac{i_0 v_0}{2} \cos \phi