为了让学生有足够的验电器进行静电实验,我们试制了一种取材方便、价格便宜的验电器(图1)。一、材料:小口厚壁玻璃瓶(由于是供学生实验用所以选用小瓶,圆底直径约3厘米,高仅6厘米)、大号钢针(缝被面用。利用针上的穿线孔,减少一般验电器中的金属棒需要钻孔的麻烦)、软木塞、纸介电容器和 In order to allow students to have enough electroscopes to conduct electrostatic experiments, we have trial-produced an electroscope that is convenient and inexpensive (Figure 1). I. Material: Small-mouthed thick-walled glass bottle (because it is for students’ experiments, so use a vial, the diameter of the round bottom is about 3 cm, and the height is only 6 cm), and the large-sized steel needle (for sewing the quilt cover. Use the threading hole on the needle, Reducing the need for drilling of metal rods in general electroscopes, cork stoppers, paper capacitors and