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测电笔结构简单携带方便,是电工常用工具之一,也是家庭常备工具之一,初中物理把了解测电笔的构造及使用方法作为学习目标之一.课本要求较低,讲述比较简单.为使教师对测电笔有全面的认识,我们组织了一次教研活动.现总结如下,供同行参考.一、研究的问题(1)人站在地上手持测电笔测火线时,靠人体构成回路,氖泡发光.那么人坐到木制椅子上跟地之间绝缘,测量火线时,为什么氖管也能发光?(2)检查有故障的插座时,为什么有时会出现两
Test pencil structure is simple and portable, is one of the tools used by electricians, but also one of the family standing tool, junior high school physics to understand the structure and use of measuring pencil as one of the learning objectives .Text lower, narrative is relatively simple. A comprehensive understanding of the test pencil, we organized a teaching and research activities. Are summarized below, for peer reference .A study of the problem (1) people standing on the ground when measuring the stylus firewire, the body formed by the loop, the neon bulb So people sitting in wooden chairs with the insulation between the ground, measuring the fire, why the neon tube can shine? (2) Check the faulty socket, why sometimes there will be two