In a salient pole synchronous machine, the airgap is

1.	In a salient pole synchronous machine, the airgap 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 decrease outwards
D.	least at one end of the pole shoe and increases to the maximum value at the other end.
Answer» C. largest under the middle of the pole shoe and decrease outwards

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In a salient pole synchronous machine, the airgap is

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