If the angular momentum of an electron is $\overrightarrow {J\,} $ then the magnitude of the magnetic moment will be
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(b)As we know for circulating electron magnetic moment
$M = \frac{1}{2}evr$ ...... $(i)$
and angular momentum $J = mvr$ ...... $(ii)$
From equation $(i)$ and $(ii)$ $M = \frac{{eJ}}{{2m}}$
$M = \frac{1}{2}evr$ ...... $(i)$
and angular momentum $J = mvr$ ...... $(ii)$
From equation $(i)$ and $(ii)$ $M = \frac{{eJ}}{{2m}}$
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