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初中物理电学中的动态电路,通俗地说,就是电路中某个电器元件状态或位置的改变,引起电路中接入的电阻值的变化,从而使电压、电流、电功率等相关电学量发生相应的改变的电路。考查动态电路,对学生的要求比较高,除了能熟练掌握公式,弄清各个电学量之间的基本关系外,还应该有一定的逻辑思维能力和表达能力,因为在动态电路中,除了涉及的相关量较多外,还会用到很多电学原理和计算公式,解题时一般会让学生对原理作适当的表述,写出公式推导过程,这时学生在解题过程写的是缺少顺序的,计算结果尽管正确,但是考试过程极易失分,而且这是一个容易被忽略的问题。
Generally speaking, the dynamic circuit in physics of junior middle school is the change of the state or position of an electrical component in the circuit, which causes the change of resistance value in the circuit, so that the related electrical quantities such as voltage, current, electric power and so on correspond to Change the circuit. Examine the dynamic circuit, the requirements of students is relatively high, in addition to being able to master the formula, to understand the basic relationship between the amount of electricity, there should be a certain degree of logical thinking and presentation skills, because in the dynamic circuit, in addition to involved The relevant quantity is more, but also will use a lot of electrical principles and formulas, the problem-solving will generally allow students to make appropriate statements on the principle, write formula derivation process, then students in the process of solving problems is the lack of sequence Although the calculation results are correct, the examination process can easily be divided, and this is a problem that can be easily overlooked.