Relation of speed of a d.c. series motor with armature current and torque developed

Q.  The speed of a d.c. series motor is
- Published on 21 Oct 15

a. Directly proportional to the both armature current and torque developed
b. Inversely proportional to the armature current and square root of torque developed
c. Directly proportional to the square of the armature current and square root of torque developed
d. Inversely proportional to the square of the armature current and square of torque developed

ANSWER: Inversely proportional to the armature current and square root of torque developed

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