Electrical Machines
Which of following components of a DC generator plays vital role for providing direct electric current of a DC generator?

 Equalizer rings.
 Eye bolt.
 Dummy coils.
 Commutator.

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Electrical Machines
With the increase in speed of DC motor

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

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