用一把干燥的塑料梳在干燥的头发上梳几下,再靠近纸屑和绒毛,塑料梳立刻会把这些轻小的东西吸住。因为塑料梳和头发摩擦以后,上面带了电荷,这叫做摩擦起电。冬天,在气候干燥的晚上,脱毛衣时,衣物和皮肤摩擦后就放出电火花,发出“噼啪”的爆裂声,这叫做放电。 运汽油的汽车行驶 Comb a few dry hairs with a dry plastic comb, close to the paper dust and fluff. The plastic comb will immediately suck the light and small things. Since the plastic comb and the hair are rubbed and charged on it, this is called frictional electrification. In the winter, on a dry night, when the sweater is stripped, the clothes and the skin will give off electric sparks and produce a “pop” crackle. This is called discharge. Gasoline car driving