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Electrical Machines

Electrical Machines
A 4-pole generator with 16 coil has a two layer lap winding. The pole pitch is

 16.
  4.
 8.
 32.

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Electrical Machines
Silicon content in steel lamination is kept within 5% as it

All of these
 Increases cost.
 makes the material brittle.
 increases hysteresis loss.

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Electrical Machines
If the no-voltage release in a DC motor starter fails to operate on failure of supply, on resumption of supply the motor will

 not start automatically.
 get damaged.
 develop very low starting torque.
 start automatically without trouble.

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Electrical Machines
Compensating winding is placed in the

 armature core
 main field
All of these
 pole shoe

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Electrical Machines
Breadth factor is defined as the ratio of

None of these
 both 1 and 2.
 emf with concentrated winding to emf with distributed winding.
 emf with distributed winding to emf with concentrated winding.

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Electrical Machines
What is power factor of a 3 - φ induction motor at no load?

  Equal to 1.
  Same as full load.
  Low.
  High.

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MORE MCQ ON Electrical Machines

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