精选优质文档-倾情为你奉上第1章电路定律及分析方法习题+-R1R2R3I1I2I34A10V5AFigure 1.3BA1.3（支路电流法)Consider the circuit of Figure 1.3 where R1=R2=1W and R3=2W. Find the three currents, I1, I2, I3.(Answer：)1.4 (电源模型的等效互换法)Use source transformations to find the voltage U across the 1-mA current source for the circuit shown in Figure 1.4. (Answer: U = 3 V)+-600 W1400 W3000 W1 mA-+6 mAU1.4 VFigure 1.41.5 (结点电位法) 如图1.5所示电路，用结点
