二.电阻并联( Parallel connection of resistors) 等效 RiIR R R u R 由KCL:i=i1+l+…+ik+…+ =G1+G2l+…+Gk+…+Gnl =(G+G2+…+Gk+…+Gn=G 即Gm==G1+G2+…+G+…+Gn=∑G 等效电导等于并联的各电导之和等效 由KCL: 即 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 of Resistors ) k n i = i + i ++ i ++ i 1 2 = G1 u +G2 u ++Gk u ++Gn u = (G1 +G2 ++Gk ++Gn )u = Gequ eq = = G + G + + Gk + + Gn = Gk u i G 1 2  