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Physics Question on Electromagnetic induction

The magnetic moment of an electron (e) revolving in an orbit around nucleus with an orbital angular momentum is given by:

A

μL⃗\vec{\mu L}=eL⃗2m\frac{\vec{eL}}{2m}

B

μL⃗\vec{\mu L}=−eL⃗2m-\frac{\vec{eL}}{2m}

C

μL⃗\vec{\mu L}=−eL⃗m\frac{\vec{eL}}{m}

D

μL⃗\vec{\mu L}=2eL⃗m\frac{\vec{2eL}}{m}

Answer

μL⃗\vec{\mu L}=−eL⃗2m-\frac{\vec{eL}}{2m}

Explanation

Solution

∵ μ⃗\vec{\mu }=qL⃗2m\frac{\vec{qL}}{2m}
μ⃗\vec{\mu }=−eL⃗2m-\frac{\vec{eL}}{2m}