Question

Given that a flux density of 1.2 is produced in a piece of steel by a magnetising force of 1250. Find the relative permeability of the steel under these conditions.

Answer 1

$B=\mu \mu_0 H,$

$\mu=\frac B{\mu_0 H},$

$\mu=\frac {1.2}{4\pi\cdot 10^{-7}\cdot 1250}=764.$