1. The problem statement, all variables and given/known data An isolated solid copper sphere of radius .12m has a positive charge of 6.4x10^-9 C. i) calculate the electric potential at a point .10 m from the center of the sphere. ii)calculate the electric potential at a point .24 m from the center of the sphere. 3. The attempt at a solution i) originally i thought the answer was 0 because since the sphere is copper it is conducting, so all the charge is on the surface of the sphere so at a distance .1 m (not reaching the surface) i assumed the potential was 0. i now know that this is incorrect. if someone could explain that to me i would appreciate it. is it because the electric potential doesn't work exactly like Gauss' law in that where the charge is matters. ii)i used the equation V=kQ/R, however instead of using the .24 meters from the center, i used .12 m as R because the charge is at the surface, so a point .12m away from the surface of the sphere is only .12 m away from the charge. its apparently wrong and i dont understand why.