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Electrical Machines

Electrical Machines
In a synchronous motor, damper windings are provided on

  pole faces.
  stator frame.
None of these
  rotor shaft.

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Electrical Machines
Cross magnetization effects which of the following?

 reduction in main field flux
 reduces the terminal voltage
 commutation
 both 2 and 3

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Electrical Machines
Eb/V ratio of a DC motor is an indication of

 Running Torque.
 Speed regulation.
  Effiency.
 Starting torque.

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Electrical Machines
In an induction motor, what is the ratio of rotor input to rotor copper loss?

 1-S
 1/S
 1/(1-S)
 S

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Electrical Machines
The emf induced in the dc generator armature winding is

None of these
 AC
 AC and DC
 DC

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Electrical Machines
Which of the following DC Motor requires 3 point starter?

  Shunt motor as well as compound motors.
  Shunt, compound and series motor.
  Series motor.
  Shunt motor.

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MORE MCQ ON Electrical Machines

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