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带电粒子在磁场中的运动是高考常考的知识点,并且是高考的重点之一,磁场的边界问题更是这类问题的重要区分点之一.高中阶段常见的磁场的边界有两种:直线边界和圆形边界;而常见的运动轨迹的动态问题也有两种:速度方向不变但大小变化的问题和速度大小恒定但方向变化的问题.这类问题组合可谓千变万化,难度也各异.如何突破这类问题,教给学生有效的解决问题的策略,是高中物理教师探索得较多的一个方向.高中物理教师讨论得较多问题之一是:如何
The movement of charged particles in the magnetic field is a common knowledge of the college entrance examination and is one of the key points of the entrance examination.The boundary problem of the magnetic field is one of the important distinguishing points of such problems.The boundary of common magnetic field in high school has two kinds: Linear boundary and circular boundary. However, there are also two kinds of dynamic problems of common motion trajectories: the problem of invariable speed but the size change and the constant speed but the change of direction, the combination of these kinds of problems can be described as ever-changing and difficult. How to break through this kind of problem and teach students how to solve the problem effectively is one direction explored by high school physics teachers.One of the more questions that high school physics teachers discuss is how