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July 6, 2021 7:03 am 30 pts
8. A uniformly charged spherical metal ball of mass M, radius R and charge q is rotating with an angular velocity w about one of its diameter. Then the ratio of its magnetic dipole moment to the mechanical moment (angular momentum) is (a) a/2MR, (6) q/2M, (c) q/M, (d) q/Mw
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