If the angular momentum of an electron is `vec(J)` then the magnitude of the magnetic moment will be

Options

A. `(eJ)/m`
B. `(eJ)/(2m)`
C. eJ 2m
D. `(2m)/(eJ)`

Answer

B

Explanation

`M=pir^(2)i=(pir^(2)e)/T=(omegar^(2) e)/2=(omegamr^(2)e)/(2m)=(je)/(2m)`