In a salient pole synchronous machine, the air gap is
A. uniform under the whole pole shoe.
B. least under the middle of the pole shoe and increases outwards.
C. largest under the middle of the pole shoe and decreases outwards.
D. least at one end of the pole shoe and increases to the maximum value at the other end. [U.P.S.C. IES. 2004]
Answer:B
In a salient pole synchronous machine, the air gap is
A. uniform under the whole pole shoe. B. least under the middle of the pole shoe and increases outwards. C. largest under the middle of the pole shoe and decreases outwards. D. least at one end of the pole shoe and increases to the maximum value at the other end. [U.P.S.C. IES. 2004]