Recent content by ffdbzathf

Exercise question? This is not for school dude...it's june, school is over. I'm working out of a book called Electricity and Magnetism by Purcell, by myself, and have gotten stuck on this question. Thank you so much for being helpful.

A spherical volume of radius, a, is filled with charge of uniform density, p. We want to know the potential energy, U, of this sphere of charge, that is, the work done in assembling it. Calculate it by building the sphere up layer by layer, making use of the fact that the field outside a...