带电粒子在匀强磁场中的运动问题是高考的热点和重点,当然也是学生学习中的难点.解决带电粒子在磁场中的匀速圆周运动问题时,先画好草图,确定带电粒子在磁场中的运动轨迹,然后利用几何关系、运动规律求解.其中重点解决的3个基本问题是:圆心的确定,半径的计算,时间的求解.13个基 Charged particles in uniform magnetic field movement problem is the hot spot and focus of the college entrance examination, of course, is also a difficult student learning.To solve the problem of uniform circular motion of charged particles in the magnetic field, first sketch, to determine the charged particles in the magnetic field Motion trajectory, and then use the geometric relationship, the law of motion solution.Among them three key problems to be solved are: the determination of the center of the circle, the calculation of radius, the solution of time