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

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...

Which of the following motors is non-self starting ?

A. D.C. series motor B. synchronous motor C. Squirrel cage induction motor D. Wound round induction motor...

The armature current of the synchronous motor has higher values for_____________?

A. high excitation only B. low excitation only C. both A. and (b) D. none of the above...

The working of a synchronous motor is similar to_____________?

A. gear train arrangement B. transmission of mechanical power by shaft C. distribution transformer D. turbine E. none of the above...

A synchronous machine with large air gap has______________?

A. a higher value of stability limit B. a small value of inherent regulation C. a higher synchronizing power which makes the machine less sensitive to load variations D. all of the above...