Electrical Machines
In double cage induction motor, the outer cage offers

  low resistance and low reactance.
  low resistance and high reactance.
  high resistance and low reactance.
  high resistance and high reactance.

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Electrical Machines
The compensating winding in a DC machine

  is located on pole shoes for avoiding the flashover at the commutator.
 is located in armature slots for compensation of the armature reaction.
  is located on pole shoes to avoid the sparking at the brushes.
 is located on commutating poles for improving commutation.

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Electrical Machines
In DC machines, the interpoles are provided

 to counteract demagnetizing effect of armature mmf in commutating zone.
  to make commutation spark less.
 to counteract the reactance voltage and the cross-magnetizi
  both (B) and (C).

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