The working of a synchronous motor is similar to_____________?

Related Mcqs:

The mechanical displacement of the rotor with respect to the stator, in polyphase multipolar synchronous motors running at full load, is of the order of_____________?

A. zero degree B. two degrees C. five degrees D. ten degrees...

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 operating speed of a synchronous motor can be changed to new fixed value by___________?

A. changing the load B. changing the supply voltage C. changing frequency D. using brakes...

If excitation of a synchronous motor running with a constant load is decreased from its normal value, ignoring effects of armature reaction, it leads to____________?

A. increase in both armature current and power factor angle B. increase in back e.m.f. but decrease in armature current C. increase in both armature current and power factor which is lagging D. increase in torque angle but decrease in back e.m.f....

A synchronous motor which works on a leading power factor and does not drive a mechanical load is called as_________?

A. static condenser B. condenser C. synchronous condenser D. none of the above...