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初中物理电学计算中有一类题目,其特点是:对电路中任何一段导体,使用任一电学公式都不能求解.解决这类问题就须考虑用列方程或方程组的方法来求解,列方程或方程组的依据,大体上有两个:一是根据题意列方程;二是根据串并联电路的特点列方程.下面结合实例分析讨论如何用列方程的方法来解电学计算题.
There is a class of problems in junior high school physics calculations. Its characteristics are that any electrical conductor in a circuit cannot be solved by using any electrical formula. To solve this kind of problem, we must consider using the column equations or equations to solve the equations. The basis of the equations is generally two: one is based on the problem-solving equation; the other is based on the characteristics of the series-parallel circuit, and the equations are listed below. The following examples are used to analyze how to use the equations of the column equation to solve the electric calculation problem.