带电粒子在磁场中运动,能够综合考查受力、匀速圆周运动、磁学等多个知识要点,成为历年高考的热点,同时也成为学生认知的难点.带电粒子在磁场中运动的题型多,变化大,其中粒子在对称磁场中运动是一种典型类型.突破这类问题,一要抓住解决带粒子在磁场中的一般方法,二要紧扣 Charged particles in the magnetic field movement, can comprehensively examine the force, uniform circular motion, magnetic and other knowledge points, become the hot spot of the college entrance examination over the years, but also become a cognitive difficulty of students. Charged particles in the magnetic field in the exercise of more problems , Changes in which the particles in the symmetrical magnetic field is a typical type of movement.To break through this problem, we must seize the solution to the general method with particles in the magnetic field, the second