A coaxial cable transmission line has capacitance per unit length C = 4.6x10- Fm andcharacteristic impedance Z = 75 SN. ) Calculate the phase velocity of waves propagating in this

cable. (b) The coaxial cable described above has inner conductor diameter a = 2 mm, and a dielectric which is non-magnetic and has relative permittivity ɛr = 1.1 between the inner and outer conductors. Calculate the diameter d of the outer conductor.