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a 250V 15kW shunt motorhas a maximum efficiency of 88% and a speed of 700rpm when...

a 250V 15kW shunt motorhas a maximum efficiency of 88% and a speed of 700rpm when delivering 80% of its rated output. the resistance of its shunt field is 100 ohm. determine the efficiency and speed when the motor draws a current of 80A from the mains
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