A long cylindrical conductor of radius a = 9.00cm and length L = 8.00 m carries a current I = 9.00 A uniformly over its cross-sectional area. The conductor is made of a material with resistivity 50.0 nano-Ohm-m.
What is the magnitude of the Poynting vector at the surface of the conductor?
What is the total power delivered by the Poynting vector to the cylinder?