论文部分内容阅读
带电粒子在有界磁场中做圆周运动的问题综合性较强,是高中物理教学的重点和难点,也是历年高考的一个热点。解决这类问题既要用到物理学中的洛仑兹力、圆周运动的规律,又要用到数学中的平面几何的相关知识。其中解决问题的关键是确定圆周运动的圆心,只有找到圆心的位置,才能正确做出粒子的运动轨迹,运用物理规律和数学知识解决问题。本文给出三种找圆心的常用途径。
The problem of the charged particles doing circular motion in a bounded magnetic field is comprehensive and strong, which is the focus and difficulty of high school physics teaching. It is also a hot point of the college entrance examination over the years. To solve such problems, it is necessary to use the Lorentz force in physics, the law of circular motion, and the related knowledge of plane geometry in mathematics. The key to solve the problem is to determine the center of circular motion. Only by finding the position of the center of the circle can we make particle trajectories correctly and solve the problem by using the laws of physics and mathematics. This article gives three common ways to find the center of the circle.