When a 3-phase synchronous generator is supplying a zero power factor lagging load, the armature field affects the main field in the following way

Related Mcqs:

The induced e.m.f. in a synchronous motor working on leading power factor will be_____________?

A. more than the supply voltage B. less than the supply voltage C. equal to the supply voltage D. None of these...

In a synchronous motor, the magnitude of stator back e.m.f. Eb depends on___________?

A. load on the motor B. d.c. excitation only C. both the speed and rotor flux D. none of the above...

A synchronous motor can be started by________?

A. pony motor B. D.C. compound motor C. providing damper winding D. any of the above...

When the stator windings are connected in such a fashion that the number of poles are made half, the speed of the rotor of a synchronous motor___________?

A. remains same as the original value B. decreases to half the original value C. tends to becomes zero D. increases to two times the original value...

Due to which of the following reasons a synchronous motor fails to pull into synchronism after applying D.C. field current?

A. High field current B. Low short circuit ratio C. High core losses D. Low field current...