Q.In a dc machine without any brush shift, the shift of the magnetic neutral axis owing to armature reaction is 

  • AIn the direction of rotation for both the generator and the motor
  • BAgainst the direction rotation for both the generator and the motor 
  • CIn the direction of rotation for the generator and against the direction of rotation for the motor
  • DAgainst the direction of rotation for the generator and in the direction of rotation of motor
Correct Answer : (C)

In the direction of rotation for the generator and against the direction of rotation for the motor

Hints :

In a dc machine without any brush shift, the shift of the magnetic neutral axis owing to armature reaction is In the direction of rotation for the generator and against the direction of rotation for the motor.

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