Q. 11

Obtain an expression for the magnetic dipole moment of a revolving electron in a Bohr model.

Answer :

According to magnetic dipole moment of revolving electron in Bohr's model


Magnetic moment of the electron is



V is the speed


e is the charge of electron


r is the radius of the orbit



Here is the mass of electron





And also


h is the Plank’s constant


n is the quantum number




For n=1 magnetic moment will be minimum.



It is called Bohr’s model of magnetic dipole moment of an electron.


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