1. The problem statement, all variables and given/known data We have coaxial cabel with radius R and R0=3R filled with magnetic.Magnetization J(r)=(r3-R3)/(2R3)*I/(2*pi*r).What is the magnitization if r=0(center of atom)?And what a magnetization direction of atom? 2. Relevant equations 3. The attempt at a solution I think what magnitization in center of atom = -inf , but it is wrong.