Practicing Success

Target Exam

CUET

Subject

Physics

Chapter

Alternating Current

Question:

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

Options:

20 W

40 W

0

1000 V

Correct Answer:

0

Explanation:

$ P = V_{rms}I_{rms cos\phi$

$\phi = \frac{\pi}{2}$

$\Rightarrow P = 0$