A long coaxial cable consists of two thin walled concentric conducting cylinders with radii a and b. The inner cylinder carries a current I (out of page) and the outer provides the return path for that current. The current creates a magnetic field between the two cylinders.
Find: a) The magnetic flux density B between the conducting cylinders a? b) The magnetic energy density in the same region. c) The total energy for a length l of the cable is d) What is the energy stored per unit length of the cable if
