The effect of increasing the load on a synchronous motor running with normal excitation is to
A)decrease both armature current and power factor
B)decrease armature current but increase power factor
C)increase armature current but decrease power factor
D)increase both its armature current and power factor

Question

Quizplus · Accepted Answer

Increasing the load on a synchronous motor causes the armature current to increase in order to supply the additional power required by the load. The power factor decreases because the motor draws more reactive power to maintain the magnetic field against the increased load.

The Effect of Increasing the Load on a Synchronous Motor