Mn, Fe", Fest, Cost, Nist, Got and Hos ( the atomic numbers of Mn, Fe, Co, Ni, Gd and Ho are -25, 26, 27, 28 ,64 and 67 respectively). -- 5 (c) Find the Curie constant for one mole of Fe3+ and Gds+ ions at 300 K. -- 5 2. The ends of two metal wires, one of pure copper and other made of stainless steel, each of length 1 meter and radius 1 mm are connected separately to a 0.2-volt battery. The electrical conductivities of copper and steel at room temperature are 1 x 10 0 *mad and 1 x 106 $2-1m-1 respectively, Find the following: (a) Resistance of these two wires. -- 5 (b) If the carrier concentration in copper and steel is the same, what is the scattering time for conduction electrons in copper and steel? --- 5 (c) What is the drift velocity of electrons in each case. -5 (d) Copper forms a face centered cubic structure (lattice parameter = 0.363 nm), if each atom of copper contributes one free electron, what is the Fermi energy of copper (please answer in eV). Also find the Fermi temperature and Hall coefficient of such a free electro metal. (The atomic mass of copper is 63.54). -- 10