Before revision: The capacitance can then be solved by substitution, and the inductance is taken from Ampere's Law for two concentric conductors (coaxial wire) and with the definition of inductance, and where is magnetic induction, is the permeability of free space, is the magnetic flux and is the differential surface.
After revision: per unit length,The capacitance can then be solved by substitution, and the inductance is taken from Ampere's Law for two concentric conductors (coaxial wire) and with the definition of inductance, and where is magnetic induction, is the permeability of free space, is the magnetic flux and is the differential surface.