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)?

Physics for Scientists and Engineers with Modern Physics

10th Edition

ISBN:9781337553292

Author:Raymond A. Serway, John W. Jewett

Publisher:Raymond A. Serway, John W. Jewett

Chapter28: Magnetic Fields

Section: Chapter Questions

Problem 16P

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Similar questions

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