Electrical Machines
In normal dc machines operating at full-load conditions, the most powerful electromagnet is

 interpole winding
 interpole and compensating windings together
 armature winding
 field winding

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Electrical Machines
Two of supply terminals to a 3 - Φ induction motor get interchanged during re-connection after normal maintenance. When switched on the supply, the motor will

  get heated and damaged.
  rotate in direction opposite to that before maintenance.
  rotate in the same direction as before maintenance.
  not start at all.

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