Compute the full-load speed, Electrical Engineering

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A 10 - hp, 250-V shunt motor has an armature circuit resistance of 0.5  and a ?eld resistance of 200 . At no load, rated voltage, and 1200
r/min, the armature current is 3 A. At full load and rated voltage, the line current is 40A, and the flux is 5% less than its no-load value because of armature reaction. Compute the full-load speed.


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