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近年来,在各地中考试题中最后一道难度较大的压轴题,一般都出在电路计算的综合题上.电路计算综合题,涉及较多的电学基础知识解决电路汁算综合题应具备对问题的综合分析能力,准确的判断能力和灵活应用数学工具解决问题的能力.现以95年部分省(市)中考压轴题为例,说明上述看法.例1(山西题)如图1所示,R_1的电阻是24欧,R_2的电阻是8欧,电源电压不变.
In recent years, the last difficult topic in the middle school examination questions is generally on the comprehensive subject of circuit calculation. The circuit calculation comprehensive question involves more basic knowledge of electricity to solve the comprehensive problem of circuit computing. The ability of comprehensive analysis, accurate judgment, and the ability to flexibly apply mathematical tools to solve problems are now illustrated in the 95th year of the final exams in some provinces (municipalities). Example 1 (Shanxi title) is shown in Figure 1. The resistance of R_1 is 24 ohms, the resistance of R_2 is 8 ohms, and the supply voltage is unchanged.