磁场的周期性回归问题在设置题干时常常会综合带电粒子运动的周期性问题和隐含性问题,学生在处理这类问题时往往感觉思路模糊,无法解题。由于实现运动回归的粒子,运动轨迹具有一定的对称性,故从轨迹角度出发归纳可能构建的题型,并结合物理规律和数学方法,实现对该题型的处理。 Periodic regression problem of magnetic field When setting dry, the periodic and implicit problems of charged particle movement are often integrated. Students often feel fuzzy thinking in solving such problems and can not solve the problem. Due to the movement regression particles have a certain symmetry of motion trajectory, so from the perspective of trajectory induction possible questions to be constructed, combined with the laws of physics and mathematical methods to achieve the type of treatment.