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Electrical Machines

Electrical Machines
What is power factor of a 3 - φ induction motor at no load?

  Equal to 1.
  Low.
  Same as full load.
  High.

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Electrical Machines
Which slots are used in the rotor of an induction motor?

  None of above.
  Semi closed slots.
  Open slots.
  Closed slots.

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Electrical Machines
In DC machine torque depends on which of the following?

 speed
 both A and B
 flux (φ)
 armature current (I)

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Electrical Machines
Scott connections are used for

 three phase to two phase transformation.
 any of the above.
 single phase to three phase transformation.
 three phase to single phase transformation.

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

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Electrical Machines
In a 6 pole DC machine, 90 mechanical degrees correspond to which of the following electrical degree?

 180.
 30.
  270.
 45.

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MORE MCQ ON Electrical Machines

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