A conducting bar of mass m = 1kg and length l = 1m is in contact with a thin conducting circular ring as shown in the figure. The bar rotates about the pivot point o which is also the center of the ring. The ring and the bar are connected by a resistor R = i0. A uniform magnetic field B = 1T is applied perpendicular to the rotating plane of the bar and the ring. The bar is released to rotate at t = O after reaching initial angular speed w, = 100rad/s. Find the angular speed w of the rod at t = 3s. (Assume that there is a good electrical contact between bar and the ring and ignore friction forces).
A conducting bar of mass m = 1kg and length l = 1m is in contact with a thin conducting circular ring as shown in the figure. The bar rotates about the pivot point o which is also the center of the ring. The ring and the bar are connected by a resistor R = i0. A uniform magnetic field B = 1T is applied perpendicular to the rotating plane of the bar and the ring. The bar is released to rotate at t = O after reaching initial angular speed w, = 100rad/s. Find the angular speed w of the rod at t = 3s. (Assume that there is a good electrical contact between bar and the ring and ignore friction forces).
Physics for Scientists and Engineers: Foundations and Connections
1st Edition
ISBN:9781133939146
Author:Katz, Debora M.
Publisher:Katz, Debora M.
Chapter32: Faraday’s Law Of Induction
Section: Chapter Questions
Problem 73PQ
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