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皮雷斯金、法列也夫、克拉尾克里斯合编的七年级用的物理课本中有这样一个比喻: “假设某一个高压线与地球之间的电压是90000伏特。如果把这个导线与地球用某种导体连通,那么,在这个导体中通过每一库仑的电量时就要放出90000焦耳的能,换句话说,将作约为9000千克米的功。要有1吨重的物体下落9米时才能作这样大的功。显然,如果我们有人被9米高处落下的1吨重物打中,那只有立刻被打死。这就是高压电为什么有危险的原因,也是在高压电下工作时要特别小心的原因”(原书第117页)。
Piraezkin, Farev, Carat tail Chris Coates compiled a textbook for the seventh grade with such a metaphor: “Suppose the voltage between one of the high-voltage lines and the earth is 90,000 volts.If the wire and the earth With some type of conductor connected, then 90,000 joules of energy will be released in this conductor passing through each coulomb, in other words, it will make a work of about 9,000 kg. Obviously, if one of us was hit by a ton of heavy cargo falling 9 meters, it would only be killed immediately.This is why highvoltages are dangerous and also at high pressure Why work with extra caution ”(page 117 of the original book).