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电学中的“路”分为直流与交流电路两种,两种电路的计算及变化规律都遵循闭合电路的欧姆定律当电路局部变化时将引发电路中的电流或导体两端电压的变化,这就是我们常说的电路动态变化问题。此类问题在每年的高考中都可以看到,由此能较好地考查学生的推理分析能力,所以在学习复习时我们要领悟破题之法。从表面上看,引起变化的原因有变阻器变阻、开关的闭合与断开、电路局部故障、变压器变化匝数等。不管哪种变化,分析思路是固定的、递进的,所以我们有理由抽象建模加以应用,提高分析能力。
Electrical “Road ” is divided into two kinds of DC and AC circuits, the calculation and variation of the two circuits follow the Ohm’s law of the closed circuit when the circuit changes locally will cause the circuit current or voltage across the conductor changes , This is what we often say that the circuit changes dynamically. Such problems in the annual college entrance examination can be seen, which can better examine the student’s reasoning ability, so when we study review we have to understand the problem of the law. On the surface, the causes of change are varistor rheostat, switch closure and disconnection, local circuit failure, transformer turns and so on. No matter what changes, analysis of ideas is fixed, progressive, so we have reason to abstract modeling to be applied to improve analytical skills.