Question

A 3 phase synchronous motor is working at normal excitation, then the flux deficient in circuit is ________

(a) given by armature winding mmf

(b) given by field winding mmf

(c) supplied to armature winding mmf

(d) supplied to field winding mmf

This question was addressed to me by my school principal while I was bunking the class.

I'm obligated to ask this question of Power Factor Control of Synchronous Machines in section Synchronous Machines of Electrical Machines

Answer 1

The correct answer is (a) given by armature winding mmf

To elaborate: it is given by armature winding mmf.