带电粒子在匀强电场中的运动,是大家都非常熟悉的运动,其运动规律是比较容易研究的,但研究带电粒子在“交变电场”中的运动规律时,对物理过程的分析能力、想象能力均有较高的要求,它既是高考的一个热点,也是复习的难点.带电粒子在交变电场中的运动相当于质点在一个周期性的外力作用下 The movement of charged particles in a uniform electric field is a well-known movement. The movement law of charged particles is relatively easy to study. However, the study of the physical process of charged particles in the “alternating electric field” Ability, ability to imagine have higher requirements, it is not only a hot college entrance examination, but also the difficulty of review.Electrified particles in alternating electric field movement is equivalent to the particle in a periodic external force