Jakson/angular momentum in electric field

[freehuman79]

Homework Statement

does anybody know how we can aprove the conservation of anular momentum in electric/magnetic field? its problem 6.10 in jakson's booktahnx

Homework Equations

The Attempt at a Solution

 

[gabbagabbahey]

Hi freehuman79, welcome to PF

As per forum policy, we require that you show some attempt at the solution before we assist you. However, I'll start you off with a hint--- Try looking at the total torque on some charge and current distribution and follow a similar method as Jackson's derivation of conservation of linear momentum (eq. 6.121)

P.S. Please don't create multiple threads for the same question; that is also against forum rules. Since ths is essentially a homework problem, this is where this question belongs.

 

[freehuman79]

I am really sorry if I broke the forum policy, bet let me insure to you that it is not homework problem. it is just the key idea of my new research.
regards