A cumulative compound long shunt motor is driving a load at rated torque and rated speed. If the series is shunted by a resistance equal to the resistance of the series field, keeping the torque constant.

Q. A cumulative compound long shunt motor is driving a load at rated torque and rated speed. If the series is shunted by a resistance equal to the resistance of the series field, keeping the torque constant.

A.            The armature current increase

B.            The motor speed increases

C.            The armature current decreases

D.            The motor speed decreases

Answer: The armature current increases