Electrical Machines
Compensating winding are used to rectify the flux density waveform at

None of these
 interpole region.
  region under main pole.
 throughout the air gap.

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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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