Electrical Machines
In case of DC Shunt Motor electromagnetic torque developed is

 None of above.
 Inversely proportional to the armature current.
 Proportional to the armature current.
 Proportional to the square of armature current.

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Electrical Machines
In DC machines, the interpoles are provided

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

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