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Summary
在这段视频中,讲解了电流的定义及其方向。电流是电荷的移动,通常以正电荷的方向来表示。虽然电子是负电荷并向相反方向移动,但历史上由本杰明·富兰克林定义的电流方向仍然沿用至今。视频解释了为什么不改变电流的方向,并强调了电流在电气和生物体内的传导方式。通过观察电荷的流动,可以计算出电流的大小,即每秒通过的电荷量。
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