percentage (%) efficiency of electric motor is: (a) 25% (b)80% (c)55% (d)3%
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When does motor efficiency peak for most motors?
Most electric motors are designed to run at 50% to 100% of rated load. Maximum efficiency is usually near 75% of rated load. Thus, a 10-horsepower (hp) motor has an acceptable load range of 5 to 10 hp; peak efficiency is at 7.5 hp. A motor's efficiency tends to decrease dramatically below about 50% load.
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