Question

Find the magnetization of a bar magnet of length 10 cm and cross-sectional area 4 cm², if the magnetic moment is 2 A∙m².

Answer 1

Data : L = 0.1 m, 

A = 4 × 10^-4 m² , 

M = 2 A∙m²

Magnetization, M_z = \(\cfrac MV\)

= \(\cfrac M{LA}\) = \(\cfrac2{(0.1)(4\times10^{-4})}\)

= \(\cfrac{10^4}{0.2}\) = 5 × 10⁴ A/m