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《自感》一节教材试图从“通电自感”与“断电自感”两个基本实验出发来说明自感现象的一般规律，这不符合学生思维的一般习惯。原因在于，两个实验的电路结构比较复杂，而且实验现象迥异，如果一开始就要求学生从纷繁复杂的实验现象中分析归纳出自感电动势的概念，并确立产生
The “self-inductance” section of the textbook attempts to illustrate the general laws of self-induction phenomenon based on the two basic experiments of “power-on self-inductance” and “power-off self-inductance”. This does not meet the general habit of students’ thinking. The reason is that the circuit structure of the two experiments is relatively complicated and the experimental phenomena are very different. If we start from the beginning, students are required to analyze and sum up the concept of self-induced electromotive force from a variety of experimental phenomena and establish it.