  In this paper we study the two disks capacitor, for equal and different
radii. The new results obtained allow a complete characterization of capacity
coefficients and forces at short distances. An extensive numerical calculation
confirms the theoretical results. The study shows the existence of a hierarchy
in the divergent behavior of the capacitance coefficients and this implies some
unusual behavior of the forces, strictly related to the dimensionality of the
near-contact zone between electrodes.
