二,电阻并联( Parallel connection) 等效 由KCL:i=i+i2+…+计+…+i=/Rq u/Rc=i=u/R1+u/R2+…+wRn=l(/R1+1/R2+…+1/Rn) 即 1/Req=1/R1+1/R2+…+1/Rn 然了年 Gq=G1+G2+…+Gk+.…+Gn=2Gk=2L/Rk 等效电导等于并联的各电导之和等效 由KCL: i = i1+ i2+  + ik+  + in= u / Req u/Req= i = u/R1 + u/R2 +  + u/Rn= u(1/R1+1/R2+  + 1/Rn ) 即 1/Req= 1/R1+ 1/R2+ + 1/Rn Geq=G1+G2+…+Gk+…+Gn = Gk= 1/Rk in R1 R2 Rk Rn i + u i1 i2 ik _ + u _ i Req 等效电导等于并联的各电导之和 二. 电阻并联 (Parallel Connection)