Q.

For a given torque, reducing diverter resistance of a dc series motor 

  • AIncreases its speed but armature current remains the same
  • BIncreases its speed demanding more armature current decreases its speed demanding less armature current 
  • CDecreases its speed but armature current remains the same
  • DDecreases speed but armature current remains the same
Correct Answer : (B)

Increases its speed demanding more armature current decreases its speed demanding less armature current 

Hints :

For a given torque, reducing diverter resistance of a dc series motor increases its speed demanding more armature current decreases its speed demanding less armature current.

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