Take the 2-minute tour ×  The Wikipedia page for Joule heating
explains   However, I wonder why they only talk about ions. Of
course, electrons can easier interact with particles, which also
have a long range field, but what about the non-charged
particles which are also all around?  Is Joule heating only
between electrons and ions?  share|improve this question  1
Answer 1  I guess they have metals in mind. For a solution
(electrolyte) it is clearly not the case because each charged
molecule (ion) is surrounded by neutral molecules (since most of
the molecules are neutral) and in liquid molecules can't just
fly through, they are in a constant collision.  share|improve
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