Power factor of a synchronous motor is unity when
A)the armature current is maximum
B)the armature current is minimum
C)the armature current is zero
D)none of the above

Question

Quizplus · Accepted Answer

The power factor of a synchronous motor is unity when the armature current is minimum because, at this point, the motor is neither consuming reactive power (lagging) nor generating reactive power (leading), resulting in a power factor of 1.

Power Factor of a Synchronous Motor Is Unity When