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Electrical Machines

Electrical Machines
In a dc machine 6 pole wave winding is used. The number of parallel paths are?

 6
 2
 1
 4

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Electrical Machines
A lap wound 4 pole dc motor has 460 conductors. Find the number of parallel paths between the conductors?

 6.
  data provided is insufficient.
  4.
  2.

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Electrical Machines
Diverters are used only in

 shunt motors
 either of these
 series motors
None of these

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Electrical Machines
Which of the following is/are effects of armature reaction?

 increase the maintenance and repair
 increase the iron loss
 increases the design cost
All of these

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Electrical Machines
Current in a coil undergoing commutation is not able to get reversed completely by the end of commutation period. It is due to

  reactance voltage induced in the coil.
  coil resistance.
None of these
 armature emf.

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Electrical Machines
Stepper motor is used in

 traction
All of these
 food processing
 computer printers

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