2等效电阻Re一 I1R R R R eq o-[ uO uO KVLL=L+l2+…+Ln =(R1+R2+…+Rn)=Rni Rn=R+R2+…+R= ∑Rk K=1KVL 2. 等效电阻Req u = u + u + + u n .... 1 2 u R R R i = ( 1 + 2 + .... + n ) Req = R + R + + Rn .... 1 2 u i u1 R1 R2 u2 un 1 Rn ' 1 1 ' 1 Req i u R i = eq = = n K RK 1