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

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Electrical Machines
The synchronous reactance( Xs) is the

 reactance due to armature reaction of the machine
 reactance either due to armature reaction or leakage flux
 combined reactance due to armature reaction and leakage flux
 reactance due to leakage flux

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