Gauss method for electric field evaluation. please help!!!! Hi ppl, I have a simple question of something that I didn't get. I guess something simple. Why in the case of Gauss solution for capacitance we add the electric field of one plate charged in positive to another charged in negative to get common electric field between two plates as you can see: http://physics.bu.edu/py106/notes/Gauss.html but in the case of two charged particles we don't do it (also in the Gauss method)? can you please give me an examples to understand it. thank you very much.