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An unsaturated dc shunt motor drives a constant torque load at a speed at 1000 rpm taking an armature current of 20 A when 230 V is applied to the motor. If the applied voltage is reduced to 115V. the motor runs at. | |
A. | 500 rpm taking an armature current of 20 A. [Wrong Answer] |
B. | 1000 rpm taking an armature current of 20 A. [Wrong Answer] |
C. | 500 rpm taking an armature current of 40 A. [Wrong Answer] |
D. | 1000 rpm taking an armature current of 40 A. [Correct Answer] |