Electrical Machines
To get the speed of DC motor is more than normal without wastage of electrical energy _____________ is used.

  Any of above method.
  Ward Leonard control.
  Rheostatic control.
  None of above.

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Electrical Machines
In a star - delta starting of an IM

  line voltage is 57.7 % of stator voltage.
  reduced voltage is applied to the stator.
  applied voltage per stator phase is 57.7 % of a line volt
  resistance is inserted in the rotor.

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