If in a synchronous motor, driving a given mechanical load and drawing current at a leading power factor from constant voltage supply its field excitation is increased, its power factor
A)will become more
B)will become less
C)will remain unchanged
D)none of the above.

Question

Quizplus · Accepted Answer

Increasing the field excitation in a synchronous motor causes the power factor to become less leading (or more lagging), as the motor shifts from under-excited to over-excited operation.

If in a Synchronous Motor, Driving a Given Mechanical Load