电路题,为什么选c?
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运用节点电压法,列出3个节点方程,然后即可求解。
U1(1/R1+l/R2+1/R3)- U2/R3 - Us/R2 = Is
U2(1/R3+1/R4)- U1/R3 - Us/R4 = -B I1.
唉,手机不好回答,自己去试试吧
;
;
U1(1/R1+l/R2+1/R3)- U2/R3 - Us/R2 = Is;
U2(1/R3+1/R4)- U1/R3 - Us/R4 = -βI1;
Us(1/R2+l/R4+1/R5)- U2/R4 - U1/R2 = 0;
5U1-U2-Us=30
2U2-U1-Us=-270I1
23Us-4U2-4U1=0
U1=R1*I1;
解得:U1=1.4V,U2=-19.8V,Us=-3.2V
U1(1/R1+l/R2+1/R3)- U2/R3 - Us/R2 = Is
U2(1/R3+1/R4)- U1/R3 - Us/R4 = -B I1.
唉,手机不好回答,自己去试试吧
;
;
U1(1/R1+l/R2+1/R3)- U2/R3 - Us/R2 = Is;
U2(1/R3+1/R4)- U1/R3 - Us/R4 = -βI1;
Us(1/R2+l/R4+1/R5)- U2/R4 - U1/R2 = 0;
5U1-U2-Us=30
2U2-U1-Us=-270I1
23Us-4U2-4U1=0
U1=R1*I1;
解得:U1=1.4V,U2=-19.8V,Us=-3.2V
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