A non-ohmic material is shaped into a solid right-circular cylinder (length L, outer radius R] and a potential difference V is applied to the ends of...

A non-ohmic material is shaped into a solid right-circular cylinder (length L, outer radius R]

and a potential difference V is applied to the ends of the cylinder. The current density J

varies as a function of radial distance from the center of the wire: J = Jor-3/2.

--- Derive an expression for the magnetic field created by the current in the wire for all

values of r >0.

The current density is not constant, and it varies according to that J = J(o) r^(-3/2). The question was posted in its entirety. I hope that helps.