Question

For a ferromagnetic material, which one of the following relationships is correct between magnetic flux density and magnetization?
1. B ≅ 2μ₀M
2. B ≅ μ0M
3. B ≅ \( \frac{{{\mu _0}M}}{2}\)
4. B ≅ \( \frac{{{\mu _0}}}{M}\)
5.

Answer 1

Correct Answer - Option 2 : B ≅ μ0M

The intensity of magnetization (M), magnetic susceptibility(χ_m), relative permeability (μ_r), and magnetic flux density (B) of this material are always prominent and positive.

\(\chi_m=\frac{M}{H} \)

\(μ _r=1+\chi_m\)

\(B=μ_0(H+M)\)

μ₀→ magnetic permittivity of free space

H → Applied peripheral magnetic field strength

Here applied field H=0

B = μ₀M