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Electrical Machines

Electrical Machines
Compensating winding is placed in the

 pole shoe
 main field
All of these
 armature core

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Electrical Machines
What is the full form of MNP?

  Magnetic neutral plane.
  Magnetic field neutral pole.
  Magnetic neutral pole.
  Magnetic field neutral plane.

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Electrical Machines
In case of a compensated DC series motor, the compensating winding is provided

 As a separate unit.
  In series with the armature winding.
 In parallel with the armature winding.
 In parallel with the field winding.

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Electrical Machines
A 250 volt dc series motor having an armature resistance of 0.2 Ω takes a load current of 60 A. What will be the torque produced at the shaft of the motor? Consider brush drop of 1V.

 234.76 N-m.
 can not be determined.
 133.22 N-m
 266.20 N-m.

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Electrical Machines
When the rotor speed, in a synchronous machine, becomes more than the synchronous speed during hunting, the damper bars develop

  induction generator torque.
  synchronous motor torque.
  induction motor torque.
  DC motor torque.

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Electrical Machines
A shunt generator is running at 1000 rpm. If flux is reduced by half, then what is the new speed?

 1000.
 2000.
 0.
 500.

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MORE MCQ ON Electrical Machines

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