Q. Compensating windings are used in D.C. generator is __.

A
To reduce eddy current by local short circuit
B
To provide path for the circulation of cooling air
C
To neutralize the cross magnetic effect of armature reaction
D
None of these
Solution:

In order to neutralize the cross magnetizing effect of armature reaction, a compensating winding is used. The compensating windings consist of a series of coils embedded in slots in the pole faces. These coils are connected in series with the armature.

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