# How do I calculate lenght in magnetic circuit that includes a rigid transversely magnetized permanen

Discussion in 'Homework Help' started by thexy, Apr 16, 2016.

1. ### thexy Thread Starter Member

Dec 13, 2015
124
0

I need to calculate l_M. Can I use Ampere's law?

$H_Ml_M+H_Ll_L=0$

and than Gauss's law $B_LA_L=B_ML_M$

and $B_M=B_R+\mu H_M$

Can I do it like this? If someone would like to finish it I would be really thankful.