Question

The magnetization within a bar of some metal alloy is 1.2×106 A/m when the H field is 200 A/m.

The permeability ′μ′ can be estimated to be:

a, 5.82×10−4H/m

b, 7.54×10−3H/m

c, 6.72×10−4H/m

d, 3.64×10−3H/m

Answer 1

Find the magnetic susceptibility:

$$\chi=\frac MH=\frac{1200000}{200}=6000.$$

The permeability is

$$\mu=\mu_0(1+\chi)=7.54·10^{-3}\text{ H/m}.$$