An electric motor operates on a 110 V supply and draws a current of 10 A. If the motor yields a mechanical power of 330 watt, what is the efficiency of the motor ?
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Here, `V = 50 V , I = 12 A` Input power `= VI = 50 xx 12 = 600 W` Output power = 150 W Efficiency of motor, `eta = ("output power")/("input power") xx 100 = (150 xx 100)/600 = 25%`
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