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奥涅斯发现的奇事在1911年时,一位叫卡默灵·奥涅斯的荷兰科学家,发现了一桩令人迷惑不解的事。他把水银放在摄氏零下268.84度的严寒下,然后去测量它的电阻。结果发现,电阻消失了。而当温度升高,它才重新变成有电阻。这是科学家起初没有料到的事。导体居然可以没有电阻!在导体中,一般总是有电阻的。电阻到处阻挡着电流,使电流不能顺顺当当地走路,弄得精疲力尽;也就是说耗尽了能量。因此,一旦没有电源给它补充能量,电流就会陡然中止。没有电阻,这意味着什么呢?这意味着,即使切去电源,电路还可以在闭合的电路能循环不已,永不断绝地流动下去。这样,超低温的水银竟成了电流通行无阻的阳关大道。
The Wonders Discovered by O’Neill In 1911, a Dutch scientist named Carmering O’Neill discovered a puzzling thing. He placed the mercury at minus 268.84 degrees Celsius and then measured its resistance. It was found that the resistance disappeared. And when the temperature rises, it becomes resistive again. This is something scientists did not expect at first. The conductor can actually have no resistance! In conductors, there is always a resistance. Resistors block currents everywhere, making it impossible for currents to travel smoothly and exhausted; that is, they run out of energy. Therefore, once there is no power supply to recharge it, the current will abruptly stop. Without resistance, what does this mean? This means that even if you cut off the power supply, the circuit can still cycle in the closed circuit, and will never stop flowing. In this way, the ultra-low temperature mercury has become a positive road to current flow.