A magnetic needle of magnetic moment 6.7 x 10-2 Am? and moment of inertia 7.5 x 10-6 kg m2 is performing simple harmonic oscillations in a magnetic field of 0.01 T. Time taken for 10 complete oscillations is 6.98 s (b) 8.76 s (c) 6.65 s (d) 8. 89 s

A magnetic needle of magnetic moment 6.7 x 10-2 Am? and moment of inertia 7.5 x 10-6 kg m2 is performing simple harmonic oscillations in a magnetic field of 0.01 T. Time taken for 10 complete oscillations is 6.98 s (b) 8.76 s (c) 6.65 s (d) 8. 89 s

Principles of Physics: A Calculus-Based Text

5th Edition

ISBN:9781133104261

Author:Raymond A. Serway, John W. Jewett

Publisher:Raymond A. Serway, John W. Jewett

Chapter23: Faraday’s Law And Inductance

Section23.3: Lenz’s Law

Problem 23.5QQ

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Question

A magnetic needle of magnetic moment 6.7 x 10-2 Am2
and moment of inertia 7.5 x 10-6 kg m- is performing
simple harmonic oscillations in a magnetic field of 0.01
T. Time taken for 10 complete oscillations is :
(a) 6.98 s
(b) 8.76 s
(c) 6.65 s
(d) 8. 89 s

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