# Q.The phasor addition of stator and rotor mmfs is possible In a cylindrical rotor synchronous machine because

• ATwo mmfs are rotating in opposite directions
• BTwo mmfs are rotating in same direction at different speeds
• CTwo mmfs are stationary with respect to each other
• DOne mmf is stationary and the other mmf is rotating
Correct Answer : (C)

Two mmfs are stationary with respect to each other

Hints :

The phasor addition of stator and rotor mmfs is possible In a cylindrical rotor synchronous machine because Two mmfs are stationary with respect to each other.

Alternator operates on the principles of

If the prime mover of an alternator supplying load to an infinite bus is suddenly shutdown, then it will