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Electrical Machines

Electrical Machines
What is the frequency of rotor current of 50 Hz induction motor operating at 4% slip?

 50Hz
 2.5Hz
 1 Hz
 2HZ

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Electrical Machines
Universal motors are used in

 cranes
 food processing
 traction
All of these

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Electrical Machines
Speed of DC motor can be controlled by varying

 applied voltage.
 all of these.
 resistance of armature culture.
 its flux oer pole.

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Electrical Machines
In a 3 - φ induction motor running at full load which of these parameters is stationary with respect to the stator mmf wave?

  Both rotor and stator winding.
  Rotor mmf wave.
  Stator winding.
  Rotor winding.

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Electrical Machines
Rotating part of DC motor is known as

 Armature.
 Carbone brush.
 Starter.
 Pole.

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Electrical Machines
Which of the following motors has low ratings only?

 Capacitor start
 Resistance split phase
 Shaded pole
 Capacitor run

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MORE MCQ ON Electrical Machines

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