Chapter7: Electricity
Section: Chapter Questions
Problem 8C
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Question
A 1.5 kg copper rod rests on two horizontal rails (see figure below) 2.4 m apart and carries a current of 35 A from one rail to the other. The coefficient of static friction between rod and rails is 0.55. What are the magnitude and angle (relative to the vertical) of the smallest magnetic field that puts the rod on the verge of sliding? (Based on the bottom picture, define to the right as the +x direction and up as the +y direction. Assume the current in the bottom picture is into the page and the magnetic force will cause the rod to slide to the right.)
magnitude | T |
direction | ° counterclockwise from the +x direction |
(please show units so that I can follow easier)
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