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____________?

Related Mcqs:

The mechanical displacement of the rotor with respect to the stator, in polyphase multipolar synchronous motors running at full load, is of the order of_____________?

A. zero degree B. two degrees C. five degrees D. ten degrees...

The armature current of the synchronous motor

A. has large values for low excitation i niy B. has large values for high excitation only C. has large values for low and high excitation D. any 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 motor can operate at____________?

A. lagging power factor only B. leading power factor only C. unity power factor only D. lagging, leading and unity power factors...

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

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