1.

An electron moves with a constant speed v along a circle of radius r. Its magnetic moment will be (e is the electron's charge)                                                       [MP PMT 1994]

A.            evr
B.            \[\frac{1}{2}evr\]
C.            \[\pi {{r}^{2}}ev\]              
D.            \[2\pi rev\]
Answer» C.            \[\pi {{r}^{2}}ev\]              


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