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高中物理教材中等势面的概念,学生较难理解,我们用导电蜡纸制成一块等势面示教板,制作简单,使用方便,教学效果良好。具体方法如下: (1)用一块35cm×25cm大小的纤维板,如图用木料做一个架子使它能竖直放置; (2)买一张光电扫描机上所用的导电蜡纸,用胶水将它平贴在纤维板上; (3)取两条25cm×2cm的铝皮分别放在导电蜡纸左右,并各用一只接线柱和三只螺丝夹紧; (4)用白漆在导电蜡纸上划上方格,可用细棉线浸漆后在蜡纸上轻轻一压来划成。这样,匀强电场中的等势面示教板就制成了。使用时在左端接负电,右端接上正电。(直流电压
High school physics textbook medium potential concept, students more difficult to understand, we use conductive stencil made of a potential surface teaching board, making simple, easy to use, teaching good effect. Specific methods are as follows: (1) with a 35cm × 25cm size fibreboard, as shown in a wooden rack so that it can be placed vertically; (2) Buy a photoelectric scanner on the conductive wax paper, glue it flat On the fiberboard; (3) Take two 25cm × 2cm aluminum skin were placed on the left and right of the conductive stencil, and each with a terminal and three screws clamping; (4) with white paint on the conductive stencil Grid, fine cotton thread can be used in the wax paper gently pressure to draw. In this way, uniform electric field in the equipotential surface of the teaching board is made. When used in the left end of the negative, right connected to positive. (DC voltage