自制“跨步电压演示器”广水市东篁镇中学（４３２７２３）沈新家图２九年义务教育教材初中物理第二册第１０章《生活用电》中讲到跨步电压触电（图１０—１４）。由于没有仪器进行演示实验，学生听后大多半信半疑，有的甚至不相信这一客观事实。对此，我自制了“跨步电压... Self-made “step voltage demonstrator” Dongshen Town Middle School of Guangshui City (432723) Shen Xinjia Figure 2 9th year compulsory education teaching materials junior high school physics second volume Chapter 10 “Household electricity consumption” talks about step voltage electric shock (Figure 10) -14). Because there are no instruments for demonstration experiments, students are mostly skeptical after listening, and some do not even believe this objective fact. In this regard, I made a "stepping voltage...