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全日制十年制学校初中《物理》课本第二册第二页,关于带了电的塑料尺使氖管发光的演示实验,在实际的教学过程中是很难做成功的。其原因是塑料尺的绝缘性能良好,氖管与塑料尺接触时不能使尺上的电荷全部放掉,只能把接触点上的少量电荷放掉,因而所生电流极其微弱,不易看到氖管发光。改进的方法如下实验原理:通过摩擦使绝缘的有机玻璃板带电,带电体上的电荷经过铝片的收集和传导而由氖管放掉,
In the second page of the second volume of the “Physics” textbook for a full-time 10-year school, it is difficult to be successful in the actual teaching process with regard to the demonstration experiment with the charged plastic ruler making the neon tube glow. The reason is that the plastic ruler has good insulation performance. When the fistula tube is in contact with the plastic ruler, the electric charge on the ruler cannot be completely discharged, and only a small amount of charge on the contact point can be discharged. Therefore, the generated current is extremely weak and not easy to see. Tube glows. The improved method is based on the following experimental principle: The insulated organic glass plate is charged by friction, and the charge on the electrified body is discharged from the manifold by the collection and conduction of the aluminum plate.