Electrical Machines
A series generator is connected in series to a feeder having 0.5Ω resistance to boost the voltage. The induced voltage is given by Eg = 0.6Ia, Ra = 0.2Ω and Rs = 0.3Ω. Find the voltage boosted by the generator, when delivering 400 Amp?

 60 V.
 40 V.
 90 V.
 30 V.

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Electrical Machines
With the increase in speed of DC motor

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

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