A synchronous motor can be used as a synchronous capacitor when it is____________?

Related Mcqs:

An important advantage of a synchronous motor over wound round induction motor is that

A. its power factor may be varied at will B. its speed is independent of supply frequency C. its speed may be controlled more easily D. none of the above...

A synchronous motor connected to infinite bus-bars has at constant full load, 100% excitation and unity power factor. On changing the excitation only, the armature current will have_____________?

A. no change of power factor B. lagging power factor with over-excitation C. leading power factor with under-excitation D. leading power factor with over-excitation...

The shaft of synchronous motor is made of____________?

A. mild steel B. chrome steel C. alnico D. stainless steel...

The percentage slip in case of a synchronous motor is____________?

A. 1% B. 100% C. 0.5% D. zero...

If the synchronous motor, properly synchronised to the supply is running on no load and is having negligible loss then_____________?

A. the stator current will be zero B. the stator current will be very small C. the stator current will be very high D. the back e.m.f. will be more than the supply voltage E. none of the above...