Electrical Machines
In a synchronous motor hunting can be reduced to minimum possible by

  using a flywheel.
  providing damper winding in the rotor pole faces.
  designing the motor for adequate synchronizing power.
  any of above methods.

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Electrical Machines
In a DC generator, the armature reaction results in

 magnetization of leading and demagnetization of trailing pole tip.
 demagnetization of centers of poles.
  demagnetization of leading & magnetization of trailing pole tip.
  magnetization of inter poles.

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Electrical Machines
Cogging and crawling are phenomena associated with

 any of the above.
 the former at a fraction of its rate speed and the latter during starting.
 the former during starting and the latter at a fraction of its rated speed.
 cage induction machines and they are essentially the same.

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Electrical Machines
A belt-driven cumulatively-compound dc generator is delivering power to the dc mains. If the Belt snaps then the machine will run as a

 cumulative compounded motor in opposite direction
 differentially compounded motor in the opposite direction
 differentially compounded motor in the same direction
 cumulative compounded motor in the same direction

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