The armature current of the synchronous motor

Related Mcqs:

For V-curves for a synchronous motor the graph is drawn between:_______________?

A. armature current and power factor B. terminal voltage and load factor C. power factor and field current D. field current and armature current...

If in a synchronous motor, driving mechanical load and drawing current at lagging power factor from constant voltage supply, its field excitation is increased, then its power factor__________?

A. become more B. become less C. remain constant D. none of the above...

Armature of a synchronous machine is____________?

A. of reducing number of slip rings on the rotor B. armature is associated with large power as compared to the field circuits C. of difficulty of providing high voltage insulation on rotor D. all of the above reasons...

Riunting in a synchronous motor takes place___________?

A. when supply voltage fluctuates B. when load varies C. when power factor is unity D. motor is under loaded...

In a 3-phase, 4-pole, 50 Hz synchronous motor, the frequency, pole number and load torque all are halved. The motor speed will be____________?

A. 3000 r.p.m. B. 1500 r.p.m. C. 750 r.p.m. D. none of the above...