Physics

Problem

In a laboratory test, an AC circuit shows readings

V_{\text{rms}}=240\,\text{V}

and

I_{\text{rms}}=5\,\text{A}

on the voltmeter and ammeter respectively, while the wattmeter indicates an average power of

660\,\text{W}

. Determine the power factor of the circuit. a)

0.83

0.55

1.00

0.39