# Impedance of a coil

1. Jan 11, 2006

### levi

I have to calculate the impedance (=R+j*w*L) of an infinite copper coil (par meter), with an iron core. Given data are the magnetic permeability, conductivity and radius of the copper wire, inside and outside radius of the coil, radius of the core and permeability and conductivity of the iron.

I dont have to use some formula like pouillet's law or something like that, but start from maxwell's equations or EQS or MQS approximations. The result should be a function of the frequency. Hence the symmetry of the problem I think I should use integral equations in cilindrical coordinates, but i have no idea where to start.
Can anyone help me?
thanks