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Electrical Machines

Electrical Machines
Stepper motor is used in

 food processing
 traction
All of these
 computer printers

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Electrical Machines
If s is the slip and f is the supply frequency of an induction motor, the frequency of rotor current is given by

  sf / 2.
  f / s.
  sf.
  s2.

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Electrical Machines
The current drawn by a DC motor at the time of starting is

 Very low.
 Very high.
 Normal.
 Zero.

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Electrical Machines
Which single phase motor is used for a refrigerator?

  Repulsion.
  Universal.
  Capacitor run.
  Split phase.

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Electrical Machines
In a Dc generator the magnetic neutral axis coincide with geometrical neutral axis, when

  the generator runs on designed speed.
  there is no load on the generator.
  the generator runs on full load.
  the generator runs on overload.

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Electrical Machines
In DC machine shape of main field flux distribution is?

 triangular
 flat tapped or trapezoidal
 peaky in nature
 saddle shape

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MORE MCQ ON Electrical Machines

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