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一、难点分析首先,学生在学习“短路”这一内容之前并未接触过电学知识,对电学知之甚少,对其缺乏感性认识;其次,目前所使用的教材中,对“短路”内容的描述比较简单,大部分仅涉及电源短路,而在练习中却经常会出现短接(部分短路)问题;更有部分教师将混联电路作为学业水平考试的重点,在电学复习中常把短路知识作为增加题目难度和灵活度的一个点,给学生的理解设置了障碍。
First, analysis of difficulties First of all, students in learning “short circuit ” before this content has not been exposed to electrical knowledge, little knowledge of electricity, lack of perceptual knowledge of them; secondly, the current teaching materials, the "Content description is relatively simple, most of them involve only the power supply short circuit, but in the practice often short-circuit (partial short circuit) problem; more some teachers will mix circuit as the focus of the academic level test in the electrical review Using short-circuiting knowledge as a point to increase the difficulty and flexibility of the subject sets the barrier for student understanding.