手掌与聚苯乙烯泡沫塑料(简称泡沫塑料)摩擦,起电的效果很好,泡沫塑料带负电荷,手掌带正电荷.只要使人站在绝缘的泡沫塑料块上,人体上的电荷就不会跑掉,人就成了一个带电体.让实验者站立在一块厚5厘米以上干净干燥的泡沫塑料上,周围不与其他物体接触,用一只手与放在桌面上干净干燥大小约20×40×5厘米~3的泡沫塑料块摩擦数下,人体便带上了 The palm of the hand is rubbed with Styrofoam (abbreviated as foam), and the effect of electrification is very good. The foam has a negative charge and the palm has a positive charge. As long as people stand on the insulating foam block, the charge on the body will not Will run away, people become a charged body. Let the experimenter stand on a 5 cm thick and dry foam plastic, not around with other objects, with one hand and on the desktop clean and dry size of about 20 When the foam block of ×40×5cm~3 is rubbed, the human body takes it