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 per unit length, and is the differential surface.
After 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 flux density , is the permeability of free space, is the magnetic flux per unit length, and is the differential surface.