在高中物理阶段,当我们教授到电流产生的机制时,往往会引出一种与初中不同的导电情景,即导电粒子不仅是金属中的自由电子的情况。其最典型的例子就是电解池导电,有等电量的正、负离子同时向相反方向运动,等效于两份的正电荷朝一个方向迁移,因此电流会出现两倍的关系。那么是不是只要存在正负离子共同导电时,电流就一定双倍,我们就此进行讨论。 In high school physics, when we teach current-generating mechanisms, we tend to elicit a different conductive scenario from the junior high school, where conductive particles are not only free electrons in the metal. The most typical example is the electrolytic cell conductivity, there is such a positive and negative power ions in the opposite direction at the same time, equivalent to two positive charge in one direction, so the current will appear twice the relationship. So if there is a common positive and negative ions when the current is doubled, we will discuss.