Electrical Machines
A 3 - φ induction motor can also be referred to as a

  repulsion motor.
  asynchronous motor.
  transformer.
  shunt motor.

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Electrical Machines
A 3-φ alternator has negligible stator resistance. A short circuit test is conducted on this alternator. At a particular speed, a field current of If1 is required to drive the rated armature current. If the speed of the alternator is reduced to half, the field current required to maintain rated armature current

  Cannot be predicted due to insufficient data.
 Would be equal to If1/2.
 Would be equal to If1.
 Woud be equal to 2If1.

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Electrical Machines
Consider the following statements : Interpoles in dc machines 1. reducearmature reaction effects in the interpolar region 2. have the same dimension as main polls 3. have their windings connected in series with the armature 4. have same number of turns as the armature 5. have the polarity same as that of the main pole ahead in a motor From these, the correct statements are

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

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