来源:学生作业帮 编辑:作业帮 分类:综合作业 时间:2024/05/09 06:36:48
用戴维南定理求下图所示各电路中的电流I,
先把戴维南定理的规则仔细看一遍.
Uab = 4 + 2 * 2
= 8 V
Rab = 2 + 3
= 5 Ω
I = Uab / (Rab + RL)
= 8 / (5 + 1)
= 4/3 A
Uab = - 1 * 2 + 2 * I1 + 2 * 5
= - 2 + 2 * (5 - 2) + 10
= 14 V
Rab = 1 + 2 + 2
= 5 Ω
I = Uab / (Rab + RL)
= 14 / (5 + 2)
= 2 A