Deriving Joule's law from Maxwell's equations

[hobz]

I was wondering if Joule's law can be derived from Maxwell's equations, and if so, how?

[Amr Morsi]

Add quantum and material's presence and properties ..... and begin to derive the whole issue from the beginning ..... can you do it?

 

By the way, I can remember that there are 2 Joule's Laws: one for heat and the other for gases (if not one a feature to the second or 2 faces to the same coin).