Q50:At saturation, when nearly all the atoms have their magnetic moments aligned, the magnetic field is equal to the permeability constant m0 multiplied by the magnetic moment per unit volume. In a sample of iron, where the number density of atoms is approxi- mately atoms/m3, the magnetic field can reach 2.00 T. If each electron contributes a magnetic moment of A?m2 (1 Bohr magneton), how many electrons per atom contribute to the satu- rated field of iron?
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