In Hall effect measurements in a sodium conductor the strength of a transverse field was found to be equal to E = 5.0 μV/cm with a current density j = 200 A/cm2 and magnetic induction B = 1.00 T. Find the concentration of the conduction electrons and its ratio to the total number of atoms in the given conductor.
Atomic weight of Na being 23 and its density ≈ 1, molar volume is 23 c.c. Thus number of atoms per unit volume is
Thus there is almost one conduction electron per atom.
