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Electrical Machines

Electrical Machines
At the instant of starting, the per unit slip of 3 - Φ induction motor is

  0.05.
  0.5.
  0.1.
  1.0.

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Electrical Machines
Value of specific electric loading of Induction motor is in the range of

 40 - 400 ampere conductor / metre.
  5000 - 45000 ampere conductor / metre.
  400 - 4000 ampere conductor / metre.
 30000 - 100000 ampere conductor / metre.

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Electrical Machines
The torque angle, in a synchronous motor, is the angle between

  the rotating stator flux and rotor flux.
  the supply voltage and the back emf.
  magnetizing electric current and back emf.
None of these

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

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

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Electrical Machines
In induction motors, there is large decrease in maximum power factor when the dispersion coefficient is ________________.

  increased.
 kept constant to certain value.
 decreased.
 remains same.

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Electrical Machines
In circle diagram for induction motor, diameter of circle represents which of the following ?

 Running torque.
 Rotor current.
 Slip.
 Line voltage.

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MORE MCQ ON Electrical Machines

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