Synchronous Motors MCQ - Electrician (Set-1) with Answers

Synchronous Motors MCQ - Electrician (Set-1) with Answers

1) An electric motor in which both the rotor and stator fields rotates with the same speed is called _____ motor.

Answer is:

synchronous

Explanation:

.

2) When load on a normally excited synchronous motor is increased, its power factor tends to

Answer is:

become increasingly lagging

3) If the field of a synchronous motor is under excited, the power factor will be

Answer is:

lagging

4) In a synchronous motor, the rotor copper losses are met by

Answer is:

D.C. source

5) Synchronous capacitor is

Answer is:

an over excited synchronous motor running without mechanical load