带电粒子只在洛伦兹力作用下做匀速圆周运动,由于多种原因会使问题形成多解,如:带电粒子的电性不确定、磁场的方向不确定、初速度的方向不确定、临界状态不唯一、运动的周期性、初速度的大小不确定等等,下面分析几个典型问题.1临界状态不唯一造成多解带电粒子只在洛伦兹力作用 The charged particles only make uniform circular motion under Lorentz force, which leads to the solution of many problems such as the uncertainty of the electrical properties of the charged particles, the uncertainty of the direction of the magnetic field, the uncertainty of the initial velocity, the criticality The state is not the only one, the periodicity of the movement, the uncertainty of the initial velocity, etc. In the following, we analyze several typical problems.1 The critical state is not the only one that leads to the Lorentz force