1. The problem statement, all variables and given/known data Two conducting spheres having same charge density and with radius “R” & “2R” are brought in contact and separated by large distance. What are their final surface charge densities ? 2. Relevant equations No equation in question. 3. The attempt at a solution Tried using the fact that distribution of charges on spheres are proportional to their radii but end up with the wrong answer. Also how to calculate charge distribution for same question but on different shapes.