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

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

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Electrical Machines
Where the shunt generators are widely used?

 Where voltage variation is needed over a wide load range.
  Where a constant voltage is required over a narrow load range.
 Where the load is very high.
 Where often load fluctuation is occurred.

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