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 = 10. A uniform magne tic 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 att = 4s. (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 = 10. A uniform magne tic 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 att = 4s. (Assume that there is a good electrical contact between bar and the ring and ignore friction forces).

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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