2. A metal bar with length L, mass m, and resistance R is placed on frictionless metal rails that are inclined at an angle ø above the horizontal. The rails have negligible resistance. A uniform magnetic field of magnitude B is directed downward as shown in the figure. The bar is released from rest and slides down the B b rails. a. Is the direction of the current induced in the bar from a to b or from b to a? Make sure to explain your answer. b. What is the terminal speed of the bar? c. What is the induced current in the bar when the terminal speed has been reached? d. After the terminal speed has been reached, at what rate is electrical energy being converted to thermal energy in the resistance of the bar? e. After the terminal speed has been reached, at what rate is work being done on the bar by gravity? How does this answer compare to your answer in part (d)?

2. A metal bar with length L, mass m, and resistance R is placed on frictionless metal rails that are inclined at an angle ø above the horizontal. The rails have negligible resistance. A uniform magnetic field of magnitude B is directed downward as shown in the figure. The bar is released from rest and slides down the B b rails. a. Is the direction of the current induced in the bar from a to b or from b to a? Make sure to explain your answer. b. What is the terminal speed of the bar? c. What is the induced current in the bar when the terminal speed has been reached? d. After the terminal speed has been reached, at what rate is electrical energy being converted to thermal energy in the resistance of the bar? e. After the terminal speed has been reached, at what rate is work being done on the bar by gravity? How does this answer compare to your answer in part (d)?

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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