The current and voltage in ac circuit are given by $I=5 \sin \left(100 t-\frac{\pi}{2}\right) A$ and $V=200 \sin (100 t) ~V$. The power dissipated in the circuit is
Answer & explanation
Correct answer: option 3
$ P = V_{rms}I_{rms cos\phi$
$\phi = \frac{\pi}{2}$
$\Rightarrow P = 0$