有一类电学综合题,题目本身没有给出电路图,必须根据题意(有时还要进行分析)画出电路简图,才可以求解,不妨把这类题形象地称为隐形类电学题.本文教你怎样使“隐形”的电路图“现形”。例1 将阻值分别为 R_1和 R_2的两只电阻 There is a class of electrical problems, the title itself does not give circuit diagrams, must be based on the meaning of the problem (and sometimes analysis) to draw a schematic circuit diagram before they can be solved, may wish to call this type of image invisible class electrical problems. How do you make the “invisible” circuit “visible”. Example 1 Two resistances with resistance values ​​of R_1 and R_2, respectively