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原实验装置如图1所示。一根竖直悬挂的黄铜弹簧,其下端的器皿内盛有少量水银,使弹簧的下端刚刚跟水银表面相接触,当正负两电极与低压直流电源接通时,弹簧的相邻圈流过同方向的电流,相互吸引,而使弹簧收缩,其下端离开水银表面,从而使电路断电,接着弹簧又在弹力及重力的作用下伸长,下端又与水银接触。如此反复循环,使弹簧不断地上下振动,其下端和水银表面也不停地接触和断开(在水银表面跳动),并产生电火花。
The original experimental setup is shown in Figure 1. A vertically hanging brass spring has a small amount of mercury contained in the lower end of the vessel so that the lower end of the spring is just in contact with the mercury surface. When the positive and negative electrodes are connected to the low voltage DC power source, the adjacent flow of the spring is The current in the same direction attracts each other, causing the spring to contract and the lower end to leave the surface of the mercury, thereby deenergizing the circuit. The spring then stretches under the effect of elastic force and gravity, and the lower end comes into contact with mercury. This repeated cycle, the spring constantly vibrates up and down, the lower end of the mercury surface and the contact and disconnection (beat on the mercury surface), and generate sparks.