解决粒子在磁场中运动的问题时,如何确定粒子运动的圆心是学生很难理解的问题,本文就这一问题进行研究.一、找寻解决问题的突破口带电粒子在电磁场中偏转的共同点就是最终粒子在电磁场中都做匀速圆周运动,只是运动的半径、弧长和圆心角不同,解决过程中也要用到数学和几何知识.但不难发现,解题此类问题的突破口就是要勾 To solve the problem of particles moving in the magnetic field, how to determine the center of the particle motion is difficult for students to understand, this paper studies the problem.First, to find a breakthrough to solve the problem Common to the deflection of charged particles in the electromagnetic field is the ultimate Particles in the electromagnetic field are doing uniform circular motion, but the radius of motion, arc length and central angle are different, the process of solving also need to use mathematical and geometric knowledge .But not difficult to find, solve the problem of such a breakthrough is to hook