An electric motor with constant output power will have a torque speed characteristic in the form of a

  • AStraight line through the origin 
  • BStraight line parallel to speed axis 
  • CCircle about the origin 
  • DRectangular hyperbola
Correct Answer : (D)

Rectangular hyperbola

Hints :

The current drawn by a 120 V dc motor with back emf of 110 V and armature resistance of 0.4 ohm is


With the increase in speed of a dc motor

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