You place a magnetic compass on a horizontal surface, allow the needle to settle into its equilibrium
Question:
You place a magnetic compass on a horizontal surface, allow the needle to settle into its equilibrium position, and then give the compass a gentle wiggle to cause the needle to oscillate about that equilibrium position. The frequency of oscillation is 0.312 Hz. Earth's magnetic field at the location of the compass has a horizontal component of 18.0μT. The needle has a magnetic moment of 0.680mJ/T. What is the needle's rotational inertia about its (vertical) axis of rotation?
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Step by Step Answer:
From Eq 2937 see also Eq 2936 we write the torque as r B sin ...View the full answer
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Related Book For 
Fundamentals of Physics
ISBN: 978-0471758013
8th Extended edition
Authors: Jearl Walker, Halliday Resnick
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