Recent content by Dodig

Atoms do have magnetic fields (and the spin and precession of the electron creates magnetic fields). However these magnetic fields are tought to cancel each other in non-magnetic materials (or the magnetic field is extermely small). In some permanent magnets these spins are aligned in such...

I generally think physics is quite right about things. This is just one little obstacle that bothers me :bugeye:

Almost any path works so that issue is unimportant. If what you say is true than the Lorentz force would be nonexistant at small distances.

Okay. But I was reffering exactly to the issue of self interaction. To clarify this; the spin of the electron is exerting the force on itself by the means of magnetic field which was created by the spin. ... at least that's what theory says o:)

Yes you cannot use the macroscopic (or gradual icrease of the speed/energy) model to show that, I agree. But the start of the discussion was whether the magnet hanging from metal bar does work or not. And I think I've illustrated enough to show that work is done since you have the force with...

I didn't think that way. What I meant is that the electron spin creates magnetic field. And this magnetic field is acting on all the moving charges in that field (including the electron itself). But if you look at the direction of Lorentz force, it does not make the electron go away from the...

Here is why I do think that permanent magnets do work when producing constant magnetic field: Electrons have both spin and they rotate around the nucleus. Let's concentrate on spin only. This spin represents a tiny current which creates magnetic field. In permanent magnetic materials these...

Ok, it's true that the electron orbiting the nuclei produces the magnetic field. It's also true that electron spin is producing magnetic field. However, by doing so (in permanent magnet case) electrons produce real work. Is this then the violation of conservation of energy? To me, saying...

I was thinking of the following configuration: ------------------------------------------------------------ | Iron Bar | ------------------------------------------------------------ |...

I have very simple question which I really don't understand: If you hang a permanent magnet on the metal bar and leave it there it will hang for years there. I simply ask where does the energy come from? This is my first question on this forum so I would really like if someone could...