The oscillations in a synchronous motor can be damped out by_______________?

Related Mcqs:

An over-excited synchronous motor takes__________?

A. leading current B. lagging current C. both A. and (b) D. none of the above...

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

A. augments it directly B. directly opposes it C. cross-magnetises it D. none of the above...

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...

When the field of a synchronous motor is under-excited, the power factor will be____________?

A. leading B. lagging C. unity D. zero...

By which of the following methods the constant speed of a synchronous motor can be changed to new fixed value ?

A. By changing the supply frequency B. By interchanging any two phases C. By changing the applied voltage D. By changing the load...