戴维南定理解题:
I1 = 12/18 = 2/3 A
Uab = 12 * 2/3 - 15 * 2/3
= -2V
网孔电流法:
18 * I1 - 12 * Isc = 12
16 * Isc - 12 * I1 + 15 * I1 = 0
解得:
Isc = - 1/9 A
Rab = Uab / Isc = 18Ω
I = Uab / (Rab + 6) = -1/12 A
节点电压法解题:
(1/6 + 1/12 + 1/10) * Va = 12/6 + 15 * I1/10
I1 = (12 - Va) / 6
解得:
Va = 25/3 V
I1 = 11/18A
I = (Va - 15 * I1) / 10
= - 1/12 A
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