A circuit has a resistance of 12 ohm and an impedance of 15 ohm. The power factor will be

0.4
0.8
0.125
1.25

Correct answer: 0.8

Solution

The power factor is calculated as the ratio of resistance to impedance. In this case, 12 ohms (resistance) divided by 15 ohms (impedance) equals 0.8, indicating that 80% of the power is being effectively used.

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