In a certain magnetic circuit, the core is represented by three reluctances as shown below. Assume a relative permeability $\backslash (\backslash$mu$\_\{\backslash$mathrm$\{$r$\}\}=2200\backslash ),$ and a number of turns $\backslash (\backslash$mathrm$\{$N$\}=160\backslash )$ turns.

Find the current needed to produce a flux of $10$ mWb in the core.

Answers:

The total reluctance is

A$.$t$./$Wb

The required current is

$\backslash (\backslash$mathbf$\{$i$\}=\backslash )$ Amperes.