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做静电学实验须讲究:绝缘性能好,仪器干燥清洁,空气干燥纯净,不发生放电,操作熟练。本文结合具体实验过程谈点看法。 1.用法拉第圆筒做静电平衡时净电荷只分布在导体的外表的实验,先使有绝缘柄的金属球e接触已带电的C的内表面,再使球e与验电器A接触时(如图1),A的箔片应不张开,但有时却张开了。此系放电所致,C的内表面本不带电,e当然不能把电荷搬到A上,但e与C筒口之间的放电,却使球
Electrostatic experiment must pay attention to: good insulation properties, the instrument is dry and clean, the air is dry and pure, no discharge occurs, and the operation is skillful. This article discusses some ideas in the context of specific experimental procedures. 1. When the Faraday cylinder is electrostatically balanced, the net charge is distributed only on the outer surface of the conductor. The metal ball e with insulated handle is first contacted with the inner surface of the charged C, and then the ball e is contacted with the electroscope A ( As shown in Figure 1), the foil of A should not be open, but it is sometimes open. This is caused by the discharge. The inner surface of C is not energized. Of course, e cannot move the charge to A, but the discharge between e and C cartridges makes the ball