Wire loop parallel to and above an infinite plane of iron

[khfrekek1992]

Homework Statement

A wire Loop R with a current I=10A running through it, is distance d above an infinite plane of iron with mu=5mu_0 R=2d. Find the force on the loop

Homework Equations

I would assume you could use image currents in the plane of iron to solve this

The Attempt at a Solution

I have no idea where to start: I drew an "image current loop" a distance d BELOW the plane, labeled I', and now I need to get I in terms of I'? How am I supposed to do that?

Thanks in advance

 

[khfrekek1992]

Or is there another way of doing this that I'm somehow missing?

 

[khfrekek1992]

I am so lost.. :(