The electromotive force around the cylinder is E=- o2(+j-2）-2pi Resistance per unit length of the cylinder surface effective relative magnetic permeability Bave πr2/a2 Meff= Ho Have 1- 1+i2p/(powr)' 0<Re('en)<1 where Bave =oHo.H= are averaged magnetic field
The electromotive force around the cylinder is L s dl ds t B E Resistance per unit length of the cylinder surface effective relative magnetic permeability where are averaged magnetic field 0 Re( ) 1 eff
Define a effective permeability r=(a,0,0) (Have)2=a-1 H.dr Jr=(0,0,0) Hm=a-o r=(0,a,0) H.dr (0,0,a) r=(0,0,a) (He)方=a-1 H·dr r=(0,0,0) Sy (Bave)s =a-2 B.ds (0,0,0) (a,0,0) ey=a2人B. (Baw).-a-2B.dS. (Left)=(Bave)x/(LoHave)z (e)y=(Bave)y/(o Have)v (Heft)z=(Bave)z/(Ho Have)z
Define a effective permeability