Electrical Machines
In circle diagram for induction motor, diameter of circle represents which of the following ?

 Running torque.
 Slip.
 Line voltage.
 Rotor current.

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Electrical Machines
Flashing the field of DC generator means

  neutralising residual magnetism.
 increasing flux density by adding extra turns of winding.
  making the magnetic losses forces parallel.
  creating residual magnetism by a DC source.

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