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__________?

Related Mcqs:

Slip-rings in a synchronous motor carry____________?

A. direct current B. alternating current C. no current D. all of the above...

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

A. Universal motor B. Synchronous motor C. Induction motor D. Reluctance motor...

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...

Stability of a synchronous machine:

A. decreases with increase in its excitation B. increases with increase in its excitation C. remains unaffected with increase in excitation D. any of the above...

Which of the following losses, in a synchronous motor, does not vary with load?

A. Windage loss B. Copper losses C. Any of the above D. None of the above...