Q.

Torque developed by the armature of a dc motor is proportional to

  • A(Back emf) x (Armature current)
  • B(Magnetic flux per pole) x (Armature current)
  • C(Back emf) x (Magnetic flux per pole)
  • D(Back emf) / (Magnetic flux per pole)
Correct Answer : (B)

(Magnetic flux per pole) x (Armature current)

Hints :

Torque developed by the armature of a dc motor is proportional to (Magnetic flux per pole) x (Armature current).

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