(a)Find V, in Fig. 8-20.(b)To what identical value should each of the 4Q2 resistors be changed so that V2 is 180 out of phase with the source voltage?

1 If the voltage across a 5F capacitor is 2te -V, find the current and the power 2 In 5s, the voltage across a 40mF capacitor changes from 160v to 220V. Calculating the average current through the capacitor

Find the four Y parameters of the network shown in Fig

sequence. The balanced source supplies IMW and 0.2M VAR. If R, =12, find: (a) the line current;(b)Zp; ()the transmission efficiency

一、复习提问 1.任务：单灯受控闪烁 2.硬件电路和控制程序的实现 3.单片机引脚和I/O接口

1.任务描述详细描述任务，并演示本任务的结果，给同学们留下深刻的印象 2. 硬件电路与工作原理 3. 控制程序

16.1 二端口网络 16.2 二端口的方程和参数 16.3 二端口的等效电路 16.4 二端口的转移函数 16.5 二端口的连接 16.6 回转器和负阻抗转换器

1 Find F(s) if f(t) = (a)(t-3);(b)4t u(t-3); (c)4 cos to(t-3). 2 Obtain partial-fraction expansions for each of the following rational functions, and find the corresponding time functions:

6.1 PWM控制的基本原理 6.2 PWM逆变电路及其控制方法 6.3 PWM跟踪控制技术 6.4 PWM整流电路及其控制方法

1 Find the matrix equation in the circuit of Fig. 16-12 by nodal analysis method. Assume that each branch admittance of the circuit is 1S