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Electrical Machines

Electrical Machines
Stepper motor is used in

 computer printers
All of these
 food processing
 traction

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Electrical Machines
If B is flux density, l the length of the conductor and v the velocity of the conductor, then emf is given by

 Blv2.
 Bl2v.
 Blv.
 Bl2v2.

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Electrical Machines
Direct axis reactance is defined as the ratio of

 Vmax to Imin
 Vmax to Imax
 Vmin to Imin
 Vmin to Imax

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Electrical Machines
The slip of an induction motor normally does not depend on

  core loss component.
  rotor speed.
  shaft torque.
  synchronous speed.

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Electrical Machines
Which of the following machine is invariably provided with forced ventilation?

 Fractional horse power high speed motor.
 50 MW generator in a power plant.
  Hermetically sealed motor of refrigerator.
 Fractional horse power slow speed motor.

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Electrical Machines
The sequence of induction motor is RYB, then the direction of induction motor can be changed by which of the following sequence?

 BYR
 RBY
All of these
 BRY

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MORE MCQ ON Electrical Machines

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