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Electrical Machines

Electrical Machines
When maximum starting torque is obtained, rotor power is

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Electrical Machines
Tertiary winding in a transformer is mostly

 zig - zag star connected.
 star connected.
  delta connected.
 zig - zag delta connected.

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Electrical Machines
The no load current in a transformer lags the applied voltage by

 90°.
 0°.
  about 75°.
 about 115°.

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Electrical Machines
The size of inter poles is small as compared to main poles. What is the reason?

 In order to not to get saturated.
All of these
 In order to get saturated.
 In order to get more flux.

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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.

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

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Electrical Machines
Induction motors have the advantage of

  less maintenance.
  all of below.
  less cost.
  simple in construction.

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MORE MCQ ON Electrical Machines

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