A motor has coils with resistance of 20 N and operates from a voltage of 120 V. When the motor is operating at its maximum speed, the back emf is 100 V. Find the current in the coils (a) when the motor is just turned on and (b) when the motor has reached its maximum speed.
A motor has coils with resistance of 20 N and operates from a voltage of 120 V. When the motor is operating at its maximum speed, the back emf is 100 V. Find the current in the coils (a) when the motor is just turned on and (b) when the motor has reached its maximum speed.
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Transcribed Image Text:A motor has coils with resistance of 20 n and operates from a voltage of 120 V. When the motor is operating at
its maximum speed, the back emf is 100 V. Find the current in the coils
(a) when the motor is just turned on and
(b) when the motor has reached its maximum speed.
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