A motor has coils with a resistance of 25 Ω and operates from a voltage of 241 V. When the motor is operating at its maximum speed, the back emf is 140 V (a) Find the current in the coils when the motor is first turned on. ?A (b) Find the current in the coils when the motor has reached maximum speed. ?A (c) If the current in the motor were 5.0 A at some instant, what is the back emf at that time? ?v
A motor has coils with a resistance of 25 Ω and operates from a voltage of 241 V. When the motor is operating at its maximum speed, the back emf is 140 V (a) Find the current in the coils when the motor is first turned on. ?A (b) Find the current in the coils when the motor has reached maximum speed. ?A (c) If the current in the motor were 5.0 A at some instant, what is the back emf at that time? ?v
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 a resistance of 25 Ω and operates from a voltage of 241 V. When the motor is operating at its maximum speed, the back emf is 140 V
(a) Find the current in the coils when the motor is first turned on.
?A
(b) Find the current in the coils when the motor has reached maximum speed.
?A
(c) If the current in the motor were 5.0 A at some instant, what is the back emf at that time?
?v
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