Electrical Machines
A 4 pole dc motor with armature winding resistance of 0.6 ohm receives a supply of 230 Volt. If the back emf produced during running condition is equal to 210 volt. Calculate the current flowing through the armature at this point.

  33.33 Amp.
  43 Amp.
 29 Amp.
 44.47 Amp.

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Electrical Machines
Two synchronous generators operating in parallel 200 MW and 400 MW respectively. The drooping characteristics of their governors are 4% and 5% from no load to full load. Consider the governors operating at 50Hz on no load. How will the machine share, if the load is 600 MW?

 generator 2 gets over load
 200 MW and 400MW
None of these
 generator 1 gets over load

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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.
  none of them.
  power factor at starting in the same as that while running.

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Electrical Machines
DC Motor

  dc shunt motor with field weakening.
  dc shunt with armature resistance control.
  dc series motor.
  dc compound motor.

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