Given two finite parallel planes of length l, width w, area A = lw, and separation d, one with total surface
charge and the other with
so
The capacitance (ignoring edge effects) then follows from the equation for voltage
as
If a current I were allowed to flow, the magnetic field is easily found as
where c is the speed of light, so
The inductance would then follow from
as
Current Sheet, Infinite Parallel Planes
