A motor has coils with resistance of 20 Ω 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 Ω 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.
Chapter13: Electromagnetic Induction
Section: Chapter Questions
Problem 61P: A 120-V, series-wound motor has a field resistance of 80 and an armature resistance of 10. When it...
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A motor has coils with resistance of 20 Ω 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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