Chapter 12, Problem 18P

For the series-parallel magnetic circuit in Fig. 12.45, find the value of I required to establish a flux in the gap of ${\Phi }_{\text{g}}{\text{ = 2 × 10}}^{\text{-4}}\text{ Wb}$.

Area for sections other than $bg={\text{5 × 10}}^{\text{-4}}{\text{ m}}^{\text{2}}$

$l_{bc}=l_{fg}=\text{0}\text{.1m, }{l}_{cd}=l_{ef}=\text{0}\text{.099m}$

Fig. 12.45