節點電壓法
等號兩邊同乘6→
12-A = A + 2(A-12),
36 = 4A,
9 = A。
──I1 = (12-9)/6 = 0.5A
17 如圖所示之電路,試求電流 I1的值? (A)0.5A (B..-阿摩線上測驗