论文部分内容阅读
初中物理第二册《安全用电》一节中论述了人体触电。触电事故都是由于人体直接或间接跟火线连通,使电流通过人体造成的。人体触电有单线触电、双线触电、高压电弧触电和跨步电压触电等几种形式。在讲述这部分知识时一般是借助于挂图讲解(教学大纲亦只要求使用安全用电挂图),因而不够直观。尤其是高压电弧触电和跨步电压触电,由于生活中比较少见,学生在接受这部分知识时常感疑惑。为此我们利用废旧材料设计了这几种形式的人体触电模拟实验,较好地解决了这个问题。现介绍于下:
Physical shock is discussed in the second volume of “Physical Safety” in the junior high school physics book. Electric shock accidents are caused by the direct or indirect connection between the human body and the FireWire, which causes current to flow through the human body. There are several forms of human body electric shock such as single-wire electric shock, double-wire electric shock, high-voltage arc electric shock, and step-voltage electric shock. When this part of the knowledge is told, it is usually explained by means of a wall chart (the syllabus also only requires the use of safety wall charts), so it is not intuitive. Especially the high-voltage arc electric shock and step-voltage electric shock, because life is relatively rare, students often feel puzzled when receiving this part of knowledge. For this reason, we used waste materials to design these kinds of human body electrocution simulation experiments and solved this problem. Now introduced in the next: