4. A solid silver toroid (with square cross-section) is

wrapped by a current-carrying wire, N times, in a

configuration shown in the figure (as a cut-away view).

Note that silver is a linear diamagnetic material, which

implies that its magnetic susceptibility Xm is negative.

When a constant current I is applied through the wire

(see the arrow for its direction), find B, M, and H fields

in the interior of the silver.

Find the surface bound currents on the inner and outer radii (the surfaces at s = a and s= b).

Is the surface bound current parallel or anti-parallel to the applied current through the wire?

Find the volume bound current density in the interior of the silver.

h