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近年来,中考物理试题中电学图象题型经常会出现,这种类型的题目在填空、实验题、综合计算题中都有出现,很多考生本来就觉得物理电学较难,加之图象在题目中,就觉得难上加难.下面例举近几年中考题中几道题目来谈谈解决的方法.例1(2011年苏州)通过A、B两个电路元件的电流与其两端电压的关系如图1所示.将A、B串联后接入电路,当通过A的电流为0.2 A时,A和B两端的总电压是V;将A、B并联后接入电路,当通过B的电流为0.2 A时,A两端的电压是V.解析本题是欧姆定律一节习题中较为常见的一类习题,具有一定的综合性,把串联和并联电路的电流、电压特点考到了,学生在做题的难点在于不晓得在图像上寻找相应的物理
In recent years, the senior high school entrance examination questions often appear in the electrical image test questions, this type of questions in the fill in the blank, experimental questions, comprehensive calculation problems have appeared, many candidates have felt physical electricity more difficult, coupled with the image in the title In the next few examples in the examination questions to talk about ways to solve. Example 1 (Suzhou in 2011) through the A, B two circuit components of the current and its voltage across The relationship shown in Figure 1. A, B connected in series after the circuit, when the current through A is 0.2 A, A and B at both ends of the total voltage is V; A, B connected in parallel circuit, when through the B Of the current is 0.2 A, the voltage across A is V. Analysis This question is a common problem in the Ohm’s Law exercises a class of exercises, with a certain degree of comprehensiveness, the series and parallel circuit current and voltage characteristics of the test, the students The difficulty in doing the problem is that I do not know looking for the corresponding physics in the image