When load on an over-excited or under excited synchronous*motor is increased, rate of change of its armature current as compared with that of power factor is
A)more
B)less
C)equal
D)twice

Question

Quizplus · Accepted Answer

When the load on a synchronous motor (whether over-excited or under-excited) is increased, the rate of change of its armature current is less compared to the rate of change of its power factor. This is because the power factor is more sensitive to changes in load due to the motor's reactance and excitation levels affecting the phase angle between voltage and current, while the armature current changes are primarily influenced by the actual load increase.

When Load on an Over-Excited or Under Excited Synchronous*motor Is