Electrical Machines
With the increase in speed of DC motor

 Both back emf as well as line current increase.
 Both back emf as well as line current fall.
 Back emf falls and line current increase.
  Back emf increase but line current falls.

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Electrical Machines
In a star - delta starting of an IM

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

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