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带电粒子在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。带电粒子在有界磁场中的运动问题,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何知识。解决这类问题一般都要画出解题示意图,但往往由于有界磁场限制了思路而不能准确画出带电粒子的运动轨迹。
The movement of charged particles in the magnetic field is a difficult high school physics, but also the hot college entrance examination. In the calendar year college entrance exam questions almost every year in this area. The problem of motion of charged particles in a bounded magnetic field is comprehensive and strong. Solving such problems not only requires the use of Lorentz forces in physics, knowledge of circular motion, but also the circles in plane geometry of mathematics Analyze geometric knowledge. Solve these problems generally have to draw a solution diagram, but often due to the limitations of the field of thinking can not accurately draw the trajectory of charged particles.