A synchronous motor is running with normal excitation. When the load is increased, the armature current drawn by it increases because
A)speed of the motor is reduced
B)power factor is decreased
C)Eb (back e.m.f.) becomes less than V (applied voltage)
D)Er (net resultant voltage) in armature is increased

Question

Quizplus · Accepted Answer

When the load on a synchronous motor is increased, the net resultant voltage (Er) in the armature increases, causing an increase in the armature current to maintain the power balance.

A Synchronous Motor Is Running with Normal Excitation