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Electrical Machines

Electrical Machines
A DC generator beyond critical resistance will generate

 maximum voltage.
 maximum current.
 maximum power.
 no voltage.

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Electrical Machines
Slip rings of an induction motors are made of

  carbon.
  stainless steel.
  aluminium.
  phosphor bronze.

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Electrical Machines
For small value armature current Ia the torque developed by a DC series motor is proportional to

  Ia2.
  1/Ia.
  Ia.
  √Ia.

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Electrical Machines
A compound motor has

  tertiary winding.
  both shunt and series field winding.
  only series field winding.
  only shunt field winding.

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Electrical Machines
In a transformer which of the following losses are zero?

 Rotational loss
 Iron loss
 Copper loss
All of these

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Electrical Machines
In speed control of DC shunt motor by varying field flux, what may be the value of field regulator?

 100 ohm
 10 ohm
 0.2 ohm
 2 ohm.

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MORE MCQ ON Electrical Machines

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