Ok, this question may sound stupid to some. But still, I 'll ask. In electrostatics we frequently discuss, potential due to uniformly charged sphere.where the whole sphere's surface has positive or negative charge. So, this means, free charges of the same type(+ve or -ve) have been distributed all over the surface. Now, my question is , won't the sphere explode because of repelling forces between the free charges which are present on the surface of the sphere(as they are all postive or all negative)?