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

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

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Electrical Machines
For an ideal transformer the winding should have

 equal resistance on primary and secondary side
 no ohmic resistance on either side
 minimum resistance on primary side and maximum resistance on secondary side
 maximum resistance on primary side and least resistance on secondary side

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