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所谓变化电路,即在电路中由于滑动变阻器滑片位置的改变或电路中电键的通断等引起电路中电阻的变化,进而导致电路中电流、电压和电功率等量发生变化。常用的分析方法是先判断电路中电阻的变化情况,再用闭合电路欧姆定律计算其他量的相应变化。但有些问题中电阻的变化无法由电路结构直接获得,需借助数学方法得到结果。这种方法的优点是直观、易理解,但它有很高的数学要求:答题者能根据研究对象,熟练、综合地运用各个数学分支进行描述,计算和推导。普通高等学校招生全国统一考试(物理)也将“应用数学处理物理问题的能力”作为考查的五大
The so-called changes in the circuit, that is, in the circuit due to sliding rheostat vane position change or circuit in the key on and off caused by resistance changes in the circuit, which led to the circuit current, voltage and electric power equivalent change. Commonly used method of analysis is to first determine the resistance of the circuit changes, and then use the closed-circuit Ohm’s law to calculate the corresponding changes in other quantities. However, in some problems, the change of the resistance can not be obtained directly by the circuit structure, and the result needs to be obtained through mathematical methods. The advantages of this method are intuitive and easy to understand, but it has high mathematical requirements: the respondent can describe, calculate and derive various math branches skillfully and comprehensively according to the research object. The National Uniform Examination for General Colleges and Universities (Physics) will also be “the ability to apply mathematical treatment of physical problems” as the top five examinations