Homework Statement
Consider a charged body of finite size, (\rho=0 outside a bounded region V). \vec{E} is the electric field produced by the body. Suppose \vec{E} \rightarrow 0 at infinity. Show that the total self-force is zero: \int_V \rho \vec{E} dV = \vec{0}, i.e. the charged body does not...
Hello,
This question is from 1990 Turkey National Physics Olympics. I tried my best to translate it clearly.
1. Homework Statement
https://s23.postimg.org/cotn29afv/Hollow+Spherical+Glass.jpg
The sphere of radius 2R has an empty sphere inside with radius R. In order for the image of an object...