consider a cylinder with circular cross-section made of iron , with length L=10 cm and radius 2 cm. the cylinder is initially unmagnified , and is made to spin by angular speed 2x10^-4rad/sec about its axis
1) What should be the total spin angular momentum of the atoms in the cylinder?
2) What percentage of the atoms has their electron spin aligned in the axial direction, assuming 1 unpaired electron per atom?
3) What is the magnetization of the cylinder? (Hint: the magnetization, M, is the magnetic moment per unit volume)