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A magnetic compass has its needle, of mass 0.050 kg and length 4.0 cm, aligned with the horizontal component of Earth’s magnetic field at a place where that component has the value Bh = 16 µT. After the compass is given a momentary gentle shake, the needle oscillates with angular frequency ω= 45 rad/s.Assuming that the needle is a uniform thin rod mounted at its center, find the magnitude of its magnetic dipole moment.

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Chapter 32 Solutions
FUNDAMENTALS OF PHYSICS,AP ED.
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