1.

If the current and voltage are 90 degrees out of phase, the power factor will be?(a) 0(b) Infinity(c) 1(d) Insufficient information provided

Answer» Right choice is (a) 0

To explain I would say: The power factor is the cosine of the angle between the voltage and the current. If the angle between the voltage and the current is 90, then cos90=0. Hence, the power factor is zero.


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