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带电粒子在交变电场中的运动,由于其特殊的周期性,所以凡是涉及到交变电场的问题,往往显得比较复杂,但是笔者认为正是由于交变电场的周期性,也使得该问题又能处理得很简单。众所周知物理图象是数与形相结合的产物,是具体与抽象相结合的体现,它能够直观、形象、简洁的展现两个物理量之间的关系,清晰的表达物理过程。在高考物理中尤其是V-t图像可以结合U-t图像很好得解释交变电场中的运动问题。下面简述如何利用V-t图像巧解带电粒子在交变电场中的运动问题。
The movement of charged particles in alternating electric field, because of its special periodicity, so usually involves the problem of alternating electric field, is often more complicated, but I believe that it is precisely because of the alternating electric field of the periodic, but also makes the problem Can handle very simple. As we all know, physical image is the combination of number and form, which is the combination of concrete and abstract. It shows the relationship between two physical quantities intuitively, vividly and concisely, and clearly expresses the physical process. In the entrance exam physics, especially V-t images can be combined with U-t images well to explain the motion problems in alternating electric fields. The following briefly describes how to use the V-t image to solve the problem of the movement of charged particles in an alternating electric field.