A motor in normal operation carries a direct current of 0.850 A when connected to a 120-V
Question:
(a) what is the back emf generated by the motor?
(b) At what rate is internal energy produced in the windings?
(c) What If? Suppose that a malfunction stops the motor shaft from rotating. At what rate will internal energy be produced in the windings in this case? (Most motors have a thermal switch that will turn off the motor to prevent overheating when this occurs.)
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