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Electrical Machines

Electrical Machines
A 8 pole, 50 Hz single phase induction motor is running at 690 rpm. Its slip with respect to forward field is

 -1.92
 1.92
 -0.08
 0.08

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Electrical Machines
Slip exists in

  none of above.
  induction motor.
  synchronous motor.
  in both machines.

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Electrical Machines
For high current and low current rating which winding is employed to DC machine?

 Lap winding
 None of above
 Wave winding
 Both lap and wave winding

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Electrical Machines
In shapers and slotters which motor are preferred?

  Squirrel cage IM.
  Double cage motor.
  Synchronous motor.
  Slip ring IM.

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Electrical Machines
If a shunt generator delivers 100 A at 200 V, and the resistances of the shunt field and armature are 100 ohms and 0.01 ohms respectively, the generator emf will be

  any one of the connection.
  series.
  parallel.
  no resistance is connected.

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Electrical Machines
Stepper motor is used in

 food processing
 traction
 computer printers
All of these

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