The speed of a synchronous motor:

Related Mcqs:

The synchronous motor is not inherently self-starting because_______________?

A. the force required to accelerate the rotor to the synchronous speed in an instant is absent B. the starting device to accelerate the rotor to near synchronous speed is absent C. a rotating magnetic field does not have enough poles D. the rotating magnetic field is produced by only 50 Hz frequency currents...

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...

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...

The percentage slip in case of a synchronous motor is____________?

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

In a synchronous motor, V-curves represent relation between____________?

A. armature current and field current B. power factor and speed C. field current and speed D. field current and power factor...