Answered: Figure E29.31 в

University Physics Volume 2

18th Edition

ISBN:9781938168161

Author:OpenStax

Publisher:OpenStax

Chapter12: Sources Of Magnetic Fields

Section: Chapter Questions

Problem 44P: A superconducting wire of diameter 0.25 cm carries a current of 1000 A. What is the magnetic field...

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29.31 A 0.360-m-long metal bar is pulled to the left by an applied force F. The bar rides on parallel metal rails connected through a 45.0-Ohm resistor, as shown in Fig. E29.31, so the apparatus makes a complete circuit. You can ignore the resistance of the bar and rails. The circuit is in a uniform 0.650-T magnetic field that is directed out of the plane of the figure. At the instant when the bar is moving to the left at 5.90 m/s,

(a) is the induced current in the circuit clockwise or counterclockwise?

(b) What is the rate at which the applied force is doing work on the bar?

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