Electrical Machines
In which of the following generators negative voltage regulation can occur?

 shunt generator
 series generators
 over compound generator
 both B and C

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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

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

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