In which of the following motors the stator and rotor magnetic field rotate at the same speed?

Related Mcqs:

. In a synchronous motor which loss varies with load ?

A. Windage loss B. Bearing friction loss C. Copper loss D. Core loss...

The speed of a synchronous motor:

A. increases as the load increases B. decreases as the load decreases C. always remains constant D. none of the above...

The power factor of a synchronous motor is better than that of induction motor because

A. stator supply is relieved of responsibility of producing magnetic field B. mechanical load on the motor can be adjusted C. synchronous motor runs at synchronous speed D. synchronous motor has large air gap...

Synchronous motors are_____________?

A. not-self starting B. self-starting C. essentially self-starting D. none of the above...

If the field of a synchronous motor is underexcited, the power factor will be_____________?

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