2. A large square planar magnet with M = M(1-z/a)ý

and a thickness a lies on the x-y plane, and is held in

place on top of a similar magnet with M =

-M(1+z/a) (also thickness a).

a) Find all the bound current densities.

b)

Sketch the magnitude of the magnetic field as a

function of z, By(z).

Linear magnetic material: