退出下一页上一页章目录总目录制作群主页P773-12用回路电流法求图示电路中电流Iα及电压Uo。解:+-α4.1I5.2215oU4V1+-48αIIl1Il2Il3αl34.1II0155.2155.24l3l2l1III14285.225.2l3l2l1IIIl1αIIA5αIA5l1IA1l2IV421484l2l1oIIU退出下一页上一页章目录总目录制作群主页P773-14用回路电流法求图示电路中Ix及CCVS的功率。解:5l1I302010101020l3l2l1IIIxl3l210501010IIIl3xII+-x10I+-50V10Ω10Ω20Ω+-30V5AIxIl3Il2Il1解得A3xIPx10IIPl1l2x10IIIA5l2I55310W0退出下一页上一页章目录总目录制作群主页解:P783-15(b)列出图示电路的结点电压方程。i1Ri6R2R4R3R1SiS5i(b)①②③S51Sn24n1432111iiuRuRRRiuRRuRn264n1411132n1RRuiS51Sn24n1432111iiuRuRRR0111n264n1324uRRuRRR退出下一页上一页章目录总目录制作群主页解:P793-18(b)列出图示电路的结点电压方程。(b)+-5.02.05.0V11123uA3+-2u1+-V2①②③④选④为参考结点。1n1u33115.012n3n2n1uuuu12315.012.0115.01n3n2n1uuun32uu424n3n2uu39n3n2uu退出下一页上一页章目录总目录制作群主页解:P803-21用结点电压法求图示电路中电压U。+-I2054U0V5+-I15+-10①②③④选④为参考结点。50n1U041412015151n3n2n1UUUIU15n320n2UIV32n2UU解得: