NEET UG PHYSICS MCQ: ALTERNATING CURRENT

1 Medium

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Application +4 | -1

In an ac circuit

V\,\,\,{\text{and}}\,\,\,I

are given by

V = 50\,\,\sin \,\,50\,t\,\,\,{\text{volt}}

and

I = 100\,\,\sin \left( {50t + \frac{\pi }{3}} \right)\,\,{\text{mA}}.

The power dissipated in the circuit is

View answer and explanation

Correct option: A

1.25 watt

Option A (1.25 watt) is correct because the power dissipated in an AC circuit is given by

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

, where

\phi

is the phase difference between voltage and current.

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