Electrical Machines
The following statements relate to compensating winding (CW) and interpole winding (IW) of a dc machine : 1. CW neutralizes the armature reaction under a pole pitch 2. IW is connected in series with armature circuit 3. IW produces mmf in the commutating zone only 4. CWmmf is directed along the brush axis 5. Mmf produced by IW is equal to armature mmf From these, the correct statements are

 2, 3, 4
 1, 2, 3, 4 and 5
 2, 3, 4, 5
 1, 3, 4, 5

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Electrical Machines
The factors that are responsible for decrease in terminal voltage of a shunt generator are

  reduction in field current, effect of armature reaction, armature.
 armature resistance, effect of armature reaction.
  armature resistance, effect of armature reaction.
 armature resistance, inter poles, armature.

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