Question: A 2 5 HP , 2 4 0 VOLT SERIES MOTOR TAKES 2 3 AMPERES WHEN ORIVING ITS RATED LOAD AT 8 0 0 RPM

A 25 HP,240 VOLT SERIES MOTOR TAKES 23 AMPERES WHEN ORIVING ITS RATED LOAD AT 800 RPM. THE ARMATURE RESISTANCE IS 0.12 ANO THE SERIES FIELD RESISTANCE IS 0.08. AT WHAT SPEED WILL THE MOTOR OPERATE IF THE LOAD IS PARTIALLY REMOVED SO THAT THE MOTOR TAKES 31 AMPERE? ASSUME THAT THE FLUX IS REDUCED BY 50% FOR A CURRENT DROP 66.67% AND THAT THE BRUSH DROP IS 2 VOLTS AT BOTH LOADS
A 2 5 HP , 2 4 0 VOLT SERIES MOTOR TAKES 2 3

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