1. The problem statement, all variables and given/known data Two equal isolated metallic bodies A & B start with no charge and zero potential. A is given a charge giving B the potential U. B is then Grounded giving A the potential U. What potential did A have before B was grounded? Hint: Use symmetry and use potential coefficients. 2. Relevant equations V2-V1=int(E,1,2) V=1/(4*pi*eps) * int(e_density/R dl) 3. The attempt at a solution Don't know where to start here. The answer includes only U as variable. I think it's a question about relations.