Question

an electron in atoms revolve around the nucleun in an orbit find the magnetic moment

Answer 1

magnetic moment = current *area

The magnetic momentum can be given as

M = I A

Where

I is a current flowing through the circular loop

i.e. I = e / T

T is a time period=1 / f

Therefore 1 / T = f

I = e f

And A is a area of circular loop i.e.

A = π r2

M = e f π r2