Each atom of an iron bar (5 cm × 1 cm × 1 cm) has a magnetic moment 1.8×10-23 Am2 . Knowing that the density of iron is 7.78×103 kgm-3 atomic weight is 56 and Avogadro's  number is 6.02×1023 the magnetic moment of bar in the state of magnetic saturation will be

(a) 4.75 Am2                  (b) 5.74 Am2

(c) 7.54 Am2                  (d) 75.4 Am2

Concept Videos :-

#15 | Some Important Terms
#16 | Relation b/w Rel. Magnetic Permeability & Susceptibility

Concept Questions :-

Magnetization and magnetic intensity
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