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Electrical Machines

Electrical Machines
Iron losses in a DC machine are independent of variation in

  load.
 speed.
  voltage.
  speed and voltage.

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Electrical Machines
Which of the following represents the pitch factor?

 Cos α
 sin (α/2)
 Cos α²
 Cos (α/2)

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Electrical Machines
In DC machines internal characteristics are plotted between

 Eg vs load current
 Eg vs Ia
 Vt vs load current
 Vt vs Ia

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Electrical Machines
The slip of an induction motor during DC rheostatic braking is

  s.
 1 - s.
  2 - s.
 2 + s.

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Electrical Machines
Which of the following is minimized by laminating the core of a transformer?

 Hysteresis loss.
 Copper loss.
 Stray loss.
 Eddy current loss.

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Electrical Machines
The slip of an induction motor normally does not depend on which of the following?

 Shaft torque.
 Rotor speed.
  Core loss component.
 Synchronous speed.

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MORE MCQ ON Electrical Machines

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