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.

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

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Electrical Machines
For satisfactory parallel operation of two transformers which of the following conditions is most essential,

  polarities of all transformers must be same.
 voltage ratio of all transformers must be same.
 MVA rating of all transformer inversely proportional to impedance.
 percentage impedance of all transformers must be same.

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