Find the ratio of the speed of the generator, Electrical Engineering

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Q. A dc shunt machine has an armature winding resistance of 0.12  and a shunt-?eld winding resistance of 50 . The machine may be run on 250-V mains as either a generator or a motor. Find the ratio of the speed of the generator to the speed of the motor when the total line current is 80 A in both cases.


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