带电粒子在电场中的运动,可以是直线运动也可以是曲线运动,综合了静电场和力学的知识,故备受命题者的青睐.分析带电粒子的受力情况和运动状态以及运动过程是解决好这类问题的关键.一、带电粒子在匀强电场中的运动根据轨迹的弯曲方向判断带电粒子所受合力方向,进而判断静电力的方向以及比较电势高低、场强大小、能量变化,这是分析动力学问题的起点. The movement of charged particles in the electric field can be linear motion or curvilinear motion, which integrates the knowledge of electrostatic field and mechanics, so it is favored by the proponents.Analysis of the force and the movement state of charged particles and the movement process are the solution The key to this kind of problem is as follows: I. The movement of charged particles in a uniform electric field The direction of the resultant force of charged particles is judged according to the bending direction of the trajectory, and then the direction of the electrostatic force and the comparison of electric potential, field strength and energy change Is the starting point for the analysis of kinetic problems.