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Electrical Machines

Electrical Machines
Flux density under trailing pole tips in case of generator will

 either increase or decrease
None of these
 decrease
 increase

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Electrical Machines
Open circuit in a transformer is prefered with

 rated transformer current
 high frequency supply
 direct current
 rated transformer voltage

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Electrical Machines
What type of dielectric material is used in capacitors used for fans and for power factor correction?

  Oil impregnated paper.
  Vacuum.
  Mica.
  Glass.

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Electrical Machines
If the temperature of armature resistance is increased, the speed of a series motor would

 decrease.
 increase.
 not change.
 None of above.

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Electrical Machines
Which of the following motor used in hair dryers?

  Shaded pole IM.
  Synchronous motors.
  Split phase IM.
  Cage induction motor.

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

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

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MORE MCQ ON Electrical Machines

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