### Q.In a salient pole synchronous machine, the air gap is

• Auniform under the whole pole shoe
• Bleast under the middle of the pole she and increases outwards
• Clargest under the middle of the pole shoe and decreases outwards
• Dleast at one end of the pole shoe and increases to the maximum value at the other end.

least under the middle of the pole she and increases outwards

Hints :

In a salient pole synchronous machine, the air gap is least under the middle of the pole she and increases outwards.

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