Electrical Machines
In case of DC shunt motor if load is reduced

 The speed will increase abruptly.
 DC Shunt Motor
 The speed will increase in proportion to reduction in load.
  The speed will remains almost constant.

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

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

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