带电粒子在有界匀强磁场中的运动是高中物理的一个难点,也是高考的热点。在历年的高考试题中几乎年年都有这方面的考题。此类题目综合性较强,解这类问题既要用到物理中的洛仑兹力、圆周运动的知识,又要用到数学中的平面几何中的圆及解析几 The movement of charged particles in the bounded uniform magnetic field is a difficult point of high school physics and is also a hot spot for college entrance examination. In the calendar year college entrance exam questions almost every year in this area. The comprehensiveness of such topics is strong. To solve such problems, it is necessary to use both the Lorentz force in physics, the knowledge of circular motion, and the circles and analytic geometry in plane geometry in mathematics