A toroid with inner diameter of 3 cm, outer diameter of 5 cm,
and height of 0.1 cm is made of a body-centered-cubic (bcc)
paramagnetic material with lattice parameter equal to 0.5 nm. The
toroid is wrapped by a copper wire in 20 turns. If each atom of the
magnetic material has a magnetic moment of 1.5µB (Bohr Magneton),
(a) (1.5 pt) What is the saturation magnetization (in A/m) of the
material? (b) (1.5 pt) If a current of 2...