The speed of a d.c. motor is

February 7, 2022

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The speed of a d.c. motor is

Q. The speed of a d.c. motor is

A. Directly proportional to flux per pole

B. Inversely proportional to flux per pole

C. Inversely proportional to the applied voltage

D. None of the above

Answer: Inversely proportional to flux per pole

The speed of a d.c. motor is

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A 500 V shunt motor runs at its normal speed of 250 RPM when the armature current is 200 A. The resistance of armature is 0.12 Ω. Calculate the speed when resistance is inserted in the field reducing the shunt field to 80% of normal value and the armature current is 100A.

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