Data: A = 0.25 cm2 = 25 × 10-6 m2,
H = 4000 A∙m-1, Φ = 25 × 10-6 Wb
Magnetic induction is
B = = 1 Wb/m2
(a) B = µ0µrK
∴ The relative permeability of the material,
µr =
= = 198.91 = 199
(b) µr = 1 + χm
∴ The magnetic susceptibility of the material,
χm = µr – 1 = 199 – 1 = 198
(c) χm =
The magnetization of the rod,
Mz = χmH = 198 × 4000 = 7.92 × 105 A/m