Recent content by enerieire

Ok, that's right. But where does it comes from? Starting from the classical definition for the magnetic moment for a charge distribution μ=∑qr I don't find an answer Thanks

does anyone knows where this formula comes from? μ=½B(R^3) I am considering a sphere of radius R, with B its magnetic field. Who is μ? Thanks

okay, now it's clear. Could you help me with this other connected problem? https://www.physicsforums.com/threads/flux-of-the-poyntings-vector.900480/

Thank you, even if my doubt was about this form of the formula: A=(1/cr)*∫JdV

Thank you very much for the answers! I'm going to post another problem about Poynting's flux in a new question.

And if it was a space derivative of A? Would it have any sense? Do you know something about this form of the Poynting vector? S= c/4pi H^2 n

oh you're right, I used general instead of classical. Thanks

Hi! I'm not able to change the title of this post, anyway I've posted my question in that section you mentioned some minutes ago. I'm sorry fo the confusion.

I'm having some trouble with vector potential formulas. Ihave always used this one : A=(μ/4pi )*∫(J/r) dV, where r is a distance. I don't understand where this formulas comes from: 1) A=(1/cr)*∫JdV where c is the speed of light; 2) H=(1/cr) Ȧ where H is the magnetic field's vector. Can...

Hello to everyone!