Question

What is the poynting vector on the surface of a current carrying wire?

Answer 1

The Poynting vector represents the directional energy flux (the energy transfer per unit area per unit time) of an electromagnetic field. The SI unit of the Poynting vector is the watt per square metre (W/m2).

hope it helps

Answer 2

long straight wire of radius a and resistance per unit length R carries a constant current I. Find the Poynting vector N = E × H at the surface of the wire and give. a sketch showing the directions of the current, the electric field E, the magnetic field.