A shunt-wound DC motor with the field coils and rotor connected in parallel (Figure 1) operates from a 130 V DC power line. The resistance of the field windings, Rt, is 250 N. The resistance of the rotor, R;, is 4.40 N. When the motor is running, the rotor develops an emf E. The motor draws a current of 4.50 A from the line. Compute the emf E . • View Available Hint(s) Friction losses amount to 50.0 W. νΟ ΑΣφ ? E = V Figure 1 of 1 Submit Part D + Compute the rate of development of thermal energy in the field windings. V. FR Express your answer in watts.

A shunt-wound DC motor with the field coils and rotor connected in parallel (Figure 1) operates from a 130 V DC power line. The resistance of the field windings, Rt, is 250 N. The resistance of the rotor, R;, is 4.40 N. When the motor is running, the rotor develops an emf E. The motor draws a current of 4.50 A from the line. Compute the emf E . • View Available Hint(s) Friction losses amount to 50.0 W. νΟ ΑΣφ ? E = V Figure 1 of 1 Submit Part D + Compute the rate of development of thermal energy in the field windings. V. FR Express your answer in watts.

College Physics

11th Edition

ISBN:9781305952300

Author:Raymond A. Serway, Chris Vuille

Publisher:Raymond A. Serway, Chris Vuille

Chapter1: Units, Trigonometry. And Vectors

Section: Chapter Questions

Problem 1CQ: Estimate the order of magnitude of the length, in meters, of each of the following; (a) a mouse, (b)...

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Question

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A shunt-wound DC motor with the field coils and rotor
connected in parallel (Figure 1) operates from a 130 V
DC power line. The resistance of the field windings, Rt,
is 250 N. The resistance of the rotor, R;, is 4.40 N.
When the motor is running, the rotor develops an emf E.
The motor draws a current of 4.50 A from the line.
Compute the emf E .
• View Available Hint(s)
Friction losses amount to 50.0 W.
νΟ ΑΣφ
?
E =
V
Figure
1 of 1
Submit
Part D
Compute the rate of development of thermal energy in the field windings.
Vac
Rf
E, R
Express your answer in watts.
• View Available Hint(s)
Πνα ΑΣφ
Pth,windings
W
+

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