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

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...

The magnitude of field flux in a 3-phase synchronous motor?

A. varies with power factor B. varies with speed C. varies with the load D. remains constant at all loads...

While starting a synchronous motor by induction motor action, field winding is usually_____________?

A. connected to D.C. supply B. short-circuited by low resistance C. kept open-circuited D. none of the above...

Under which of the following conditions hunting of synchronous motor is likely to occur?

A. Periodic variation of load B. Over-excitation C. Over-loading for long periods D. Small and constant load...

The net armature voltage of a synchronous motor is equal to the_______________?

A. vector sum of Eb and V B. arithmetic sum of Eb and V C. arithmetic difference of Eb and V D. vector difference of Eh and V...