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电荷间相互作用的实验,很多教材都是用悬挂的方法,也就是将有机玻璃棒或橡胶棒悬挂起来,再用另一根有机玻璃棒或橡胶棒去靠近,从而观察相互作用现象.但是在具体实验中,悬挂起来的棒很容易受到外界的干扰而晃动,影响了对实验现象的观察.这个实验之前已有很多物理同行在这方面做了不少的改进,实验现象也比较明显.笔者在一次课堂教学中突发灵感,发现了一种更为简单易行且现象十分明显的改进方法,具体做法如图1所示.将一根与丝绸摩擦过的有机玻璃棒放在桌子边沿,
Charge interaction experiments, many textbooks are hanging method, that is, plexiglass rods or rubber rods hanging together, and then another plexiglass rod or rubber rod to go near to observe the phenomenon of interaction, but in the In the concrete experiment, the sticks hanging up are easy to be disturbed by the outside world and swayed, which affects the observation of the experimental phenomena. Before this experiment, many physical counterparts made a lot of improvements in this respect, and the experimental phenomenon is also obvious. In a classroom teaching inspired by the discovery of a more simple and obvious phenomenon of an improved method, as shown in Figure 1. A plexiglass rod rubbed with silk on the edge of the table,