The shaft torque (Tsh) in a d.c motor is less than total armature torque (Ta) because of ……………. in the motor.

February 7, 2022

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The shaft torque (Tsh) in a d.c motor is less than total armature torque (Ta) because of ……………. in the motor.

Q. The shaft torque (Tsh) in a d.c motor is less than total armature torque (Ta) because of ……………. in the motor.

A. Copper losses

B. Field Losses

C. Iron and Friction losses

D. None of the above

Answer: Iron and Friction losses

The shaft torque (Tsh) in a d.c motor is less than total armature torque (Ta) because of ……………. in the motor.

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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.

The shaft torque (Tsh) in a d.c motor is less than total armature torque (Ta) because of ……………. in the motor.

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Armature reaction in a DC motor is increased

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