Electrical Machines
Voltage regulation can be determined by which of the following?

 ZPF method.
 MMf method.
 Synchronous impedance method.
All of these

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

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