4.在各向同性磁介质中实验有 M=Xm五 M=之mB=4,-1 u LoL 40 o B -H ∴.B=4(H+M4.在各向同性磁介质中实验有 M m H   =  M B m      = B r r     0 −1 = r B B 0 0    = − H B   = − 0 ( ) B 0 H M     =  +