Total Current, Circular Cross Section

  • AIMS Maxwell 2021

    A current \(I\) flows down a cylindrical wire of radius \(R\).

    1. If it is uniformly distributed over the surface, give a formula for the surface current density \(\vec K\).
    2. If it is distributed in such a way that the volume current density, \(|\vec J|\), is inversely proportional to the distance from the axis, give a formula for \(\vec J\).