The back e.m.f. of a synchronous motor depends on______________?

Related Mcqs:

Slip-rings in a synchronous motor carry____________?

A. direct current B. alternating current C. no current D. all of the above...

The armature current of the synchronous motor

A. has large values for low excitation i niy B. has large values for high excitation only C. has large values for low and high excitation D. any of the above...

A synchronous motor running with normal excitation adjusts to load increases essentially by increase in______________?

A. back e.m.f. B. armature current C. power factor D. torque angle...

Which of the following methods is used to start a synchronous motor?

A. Damper winding B. Star-delta starter C. Damper winding in conjunction with star-delta starter D. Resistance starter in the armature circuit...

For power factor correction, synchronous motors operate at____________?

A. no-load and greatly over-excited fields B. no-load and under-excited fields C. normal load with minimum excitation D. normal load with zero excitation...