Electrical Machines
The reduced air gap results in an increase

  cost of operation.
  breaking torque.
  starting torque.
  power factor.

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Electrical Machines
An alternator is feeding an infinite busbar. Its prime mover is suddenly shutdown. The alternator will

 continue to work as alternator but the direction of rotation will reverse.
 continue to work as synchronous motor with same direction of rotation.
 come to stand still.
 start working as induction motor.

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