A long conducting rod of radius R carries a nonuniform current density given by J = J0r/R, where J0 is a constant and r is the radial distance from...

A long conducting rod of radius R carries a nonuniform current density given by J = J0r/R, where J0 is a constant and r is the radial distance from the rod's axis.(a) Find an expression for the magnetic field strength inside the rod.(b) Find an expression for the magnetic field strength outside the rod.