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NEET UG PHYSICS MCQ: ALTERNATING CURRENT

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Application +4 | -1

A generator produces a voltage that is given by

V = 240\sin 120\;t

, where t is in seconds. The frequency and r.m.s. voltage are

View answer and explanation

Correct option: C

19 Hz and 170 V

Option C (19 Hz and 170 V) is correct because the frequency is

f = \frac{\omega}{2\pi} = \frac{120}{2\pi} \approx 19

Hz and the RMS voltage is

V_{rms} = \frac{V_0}{\sqrt{2}} = \frac{240}{\sqrt{2}} \approx 170

V.

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