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一.静电屏蔽演示; 图1中B是一个放在绝缘桌上,带有高电压的无盖金属箱子(高压静电水箱),F是一个金属网罩,F,B用一根带开关的导线连起来。实验开始时先将K断开,然后准备把开关K闭合,此时学生很紧张,以为鸟儿将被高压电击毙。但在开关闭合后,鸟儿在带有高压电的网罩里照常活动,与网罩没有带电时无任何区别。这是由于金属网罩具有良好的屏蔽作用,罩内
1. Electrostatic Shielding Demonstration; B in Figure 1 is an uncovered metal box (high-voltage electrostatic tank) with a high voltage on an insulated table, F is a metal mesh cover, F, B is a wire with a switch Connect it. At the beginning of the experiment, K was disconnected and then the switch K was ready to be closed. At this time, the student was very nervous and thought that the bird would be hit by a high voltage electric shock. However, after the switch is closed, the bird moves as usual in a net with a high voltage, and it does not make any difference when the net is not charged. This is due to the good shielding effect of the metal mesh cover inside the cover