Question

Write the expression for magnetic dipolement of current loop.

Answer 1

Heya,

Magnetic moment is given by the current flowing through a unit area.

Pm=I.A

Let us consider an electron is revolving around the nucleus in radius R and with speed v.

Now, current in the circular path of the circuit I=e(charge on electron)/T where T is the time period.

now, T =2(pi)(omega) 

Pm=e(omega)2(pi)

(omega)=v/R 

so, Pm=ev/2(pi)R

Hope it helps:-))