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?

 30 V.
 40 V.
 90 V.
 60 V.

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Electrical Machines
In a 3 - Φ induction motor

  power factor at starting is high as compared to that while running.
  power factor at starting is low as compared to that while running.
  power factor at starting in the same as that while running.
  none of them.

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Electrical Machines
Skewing of the rotor in a 3 - Φ squirrel cage induction motor reduces

  noise and parasitic torque, but increase starting and pull-out torque.
  noise and pullout torque, but increase parasitic and starting torque.
  noise, parasitic and starting torque, but increase pull out torque.
  noise, parasitic torque, starting torque and pull out torque.

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