1　引言　　笔者在做带电棒吸引铜屑的实验中发现在不同的条件下会出现不同的实验结果。特别是,一般认为,铜屑是导体,不可能被带电棒吸住。但实验结果却证实,在一定条件下,铜屑确确实实能被带电棒长时间吸住。　　2　实验现象与解释用丝绸摩擦玻璃棒(或用毛皮摩擦橡胶棒)使棒带 1 INTRODUCTION The author in the experiment of using electric sticks to attract copper shavings found that different experimental results will appear under different conditions. In particular, it is generally believed that copper shavings are conductors that cannot be attracted by a live rod. However, the experimental results confirm that, under certain conditions, the copper shavings can indeed be held by the charging rod for a long time. 2 Experimental phenomena and explanations Use silk to rub glass rods (or use fur to rub rubber rods) to make rods