Question

An alternating e.m.f. is represented as $V=10\sin 314t$. The instantaneous e.m.f. at $t=\frac{1}{600}s$ is

• A. 10 V
• B. 4 V
• C. 5 V
• D. 6 V

Answer 1

Answer: (C)

Here, $V=10\sin 314t$
$V\left(att=\frac{1}{600}s\right)=10\sin \left(314\times \frac{1}{600}\right)=10\sin \frac{\pi }{6}$
$=10\times \frac{1}{2}=5V$