电磁感应习题二 1,a-r Poin 1,a-r LI= Po in Ⅰxr 单位长度上自感系数为: L po,a-r 1丌 o 如n=|dn I.ldx 27x2丌(a-x电磁感应 习题二 作者:杨茂田 2r 2r a I I l dx o x x I r l a r m − = ( ) 0 ln r l a r I L m l − = = ln 0 单位长度上自感系数为: = = l L L l r a − r ln 0 m = d m − − = + a r r ldx a x I x I [ ] 2 2 ( ) 0 0