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23 Nov 2019
A motor has coils with a resistance of 27 and operates from avoltage of 240 V. When the motor is operating at its maximum speed,the back emf is 145 V.
(a) Find the current in the coils when the motor is first turnedon.
A
(b) Find the current in the coils when the motor has reachedmaximum speed.
A
(c) If the current in the motor were 8.0 A at some instant, what isthe back emf at that time?
V
A motor has coils with a resistance of 27 and operates from avoltage of 240 V. When the motor is operating at its maximum speed,the back emf is 145 V.
(a) Find the current in the coils when the motor is first turnedon.
A
(b) Find the current in the coils when the motor has reachedmaximum speed.
A
(c) If the current in the motor were 8.0 A at some instant, what isthe back emf at that time?
V