Electrical Machines
Cogging of induction motor occurs at

 low voltage and when stator and rotor poles are not equal.
 high voltage and when stator and rotor poles are equal.
 high voltage and when stator and rotor poles are not equal.
 low voltage and when stator and rotor poles are equal.

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Electrical Machines
Slip speed is the

  sum of synchronous and rotor speeds.
  half of the sum of synchronous and rotor speeds.
  difference of actual rotor speed and synchronous speed.
  difference of synchronous speed and actual rotor speed.

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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?

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

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