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电灯的点亮,电扇的转动,电脑的运行,所有电器的正常工作都离不开电。只要我们一按下开关,一插上插头,电路马上就可以接通,这是不是因为电流流动的速度特别快呢?A:1784年,有位叫华德生的人设计了一个实验,想测出电路中电流的速度。他用1000多米长的电线做实验,电线的一端刚一通电,另一端的人立即触电。从此,人们便有个印象,认为电流流动几乎不需要时间,自由电子在金属导线里奔跑的速度
Light lighting, fan rotation, the operation of the computer, all the normal electrical work can not do without electricity. As long as we press the switch, plug the plug, the circuit can be connected immediately, this is not because the current flow is particularly fast it? A: In 1784, a man named Huade students designed an experiment, think Measure the speed of current in the circuit. He experimented with more than 1,000 meters of wire, one end of which was energized and the other end of the wire electrocuted immediately. Since then, people have the impression that the current flow almost does not require time, free electrons run in the metal wire speed