例求:Rb a b b 20g 1009 200 L00g21092 609 120260g2 40g2 600 50 809 a a b b 2092110092 200 00g2 100g2 60g2 40g2 Rn1=70g2
例 60 100 50 10 b a 40 80 20 求: Rab 100 60 b a 40 20 100 100 b a 20 60 100 60 b a 120 20 Rab＝70
求:R 202 59 a 200 150 b 15g9b 6 4 a 159 b 79 圈
例 15 20 b a 5 6 6 7 求: Rab 15 b a 4 3 7 15 20 b a 5 6 6 7 15 b a 4 10 Rab＝10 缩短无电阻支路