在稳恒电流这一章中,电路分析和计算是一个 比较重要的内容,应用等效电阻把电路简化,我们 比较重视,但对于应用等效电源来简化电路分析和 计算就比较容易忽视了,下面通过一些典型实例, 介绍等效电源在电路分析和计算中的应用。 [例1]如图(1)所示的电路中,当可变电阻R 的阻值增大时( ) A.AB两点间的电压U增大 In the chapter of steady current, the circuit analysis and calculation is an important content. Using equivalent resistance to simplify the circuit, we pay more attention to it, but it is easy to overlook the use of equivalent power to simplify circuit analysis and calculation. The following uses some typical examples to introduce the application of equivalent power in circuit analysis and calculation. [Example 1] In the circuit shown in Fig. (1), when the resistance of the variable resistor R increases () The voltage U between two points A.AB increases