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  4. An alternating e.m.f. is represented as V = 10 sin 314 t. The instantaneous e.m.f. at t = (1/600) s is

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

COMEDKCOMEDK 2008Alternating Current

Solution:

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