Tangential components of the electric field across an interface between two media, with no impressed magnetic current densities along the boundary of the interface, are continuous. So: $ n \times (E_2 - E_1) = 0$. Now suppose an lumped circuit with some elements that are connected with infinite electric conductivity wire $(\sigma = \nsim)$ $\longrightarrow E_1t =E_2t = 0$ (in the wire and cylinder). What makes electrons move along the cylinder when there are no tangential components of the electric field?
lumped circuits : http://en.wikipedia.org/wiki/Lumped_element_model