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在初中物理第二册的第七章-简单的电现象,第一节“摩擦起电,两种电荷”中是用现成的实验器材:即塑料棒与毛皮,玻璃棒与丝绸摩擦后来证明电荷的种类,电荷间的相互作用关系.此实验比较麻烦,由于教室的空气湿度大,需要有烘干箱,效果有时也不明显,造成成功率低,耽误教学.为此,我多年来采用聚乙烯包装绳与本实验相结合,取得了良好的教学效果,实验现象明显,成功率高.具体方法如下:
In the seventh chapter of junior high school physics - the simple electrical phenomenon, the first section “frictional electrification, two kinds of charge ” is using ready-made experimental equipment: namely plastic rods and fur, glass rods and silk friction later Prove the type of charge, the interaction between the charge. This experiment is cumbersome. Due to the high humidity in the classroom, there is a need for a drying box. The effect is sometimes not obvious, resulting in a low success rate and delaying teaching. For many years, I have The use of polyethylene packaging ropes combined with this experiment has achieved good teaching results, the experimental phenomenon is obvious, and the success rate is high. The specific methods are as follows: