Electrical Machines
Why are capacitors used with large AC induction motor?

  Improve voltage level.
  Improve current level.
  Improve power factor.
  Improve power level.

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Electrical Machines
In dc machines, the field system has to be provided on stator unlike synchronous machines Where in it could be on any member, because

 commutator action is not possible otherwise
 dc machines are comparatively low rating machines.
 it reduces field structure iron losses
 it gives more uniform air-gap flux distribution

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Electrical Machines
Two synchronous generators operating in parallel 200 MW and 400 MW respectively. The drooping characteristics of their governors are 4% and 5% from no load to full load. Consider the governors operating at 50Hz on no load. How will the machine share, if the load is 600 MW?

 generator 2 gets over load
 generator 1 gets over load
 200 MW and 400MW
None of these

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