电对生产、生活的影响,我们已深有感触.电荷的定向移动形成电流,那么,是什么力量使杂乱无章的电荷能乖乖地定向移动呢?我们现在就从电压的作用和单位、测量电压的工具及电压表的正确使用三方面,认识一下这位“幕后英雄”—电压 We have a deep feeling about the impact of electricity on production and life. The charge moves in a directional direction to form a current. So what force can make the disordered charge move obediently? We now measure the voltage from the action and unit of voltage Tools and voltmeter the proper use of three aspects, to know this “behind the scenes hero ” - voltage