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Electrical Machines

Electrical Machines
Hysteresis loss is proportional to

  f.
 f2.
 f3.
 f1.5.

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Electrical Machines
Which slots are used in the rotor of an induction motor?

  Open slots.
  Closed slots.
  None of above.
  Semi closed slots.

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Electrical Machines
The stator frame in an induction motor is used to

  hold armature stamping in position.
  protect the whole machine.
  provide return path for the flux.
  ventilate the armature.

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Electrical Machines
In DC machines internal characteristics are plotted between

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

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Electrical Machines
Hopkinss test in DC motor is conducted at ?

 None of these.
  Full load.
 Low load.
 No load.

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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
 BRY
All of these

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MORE MCQ ON Electrical Machines

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