Cross-section of a coaxial cable:he radii of two concentric conductor is a and b respectively. In between, it is filled with an ideal dielectric with a permittivity e. Assume the charge in the inner conductor is Q Coulomb/meter.
a) Find the electric flux density D(value and its direction).
b)find out the electric field intensity E (value and its direction).
c)find out its Potential.
d)Find out the Capacitance per unit length C