论文部分内容阅读
一带电粒子在匀强磁场中做匀速圆周运动,如果突然将磁场的磁感应强度加倍,粒子的速率、轨道半径将发生怎样的变化?不少有关高中物理的复习题和练习册中有这方面的选择题,而且一般都给出速率不变、轨道半径减半的参考答案。1991年第11期本刊《谈突变的磁场中带电粒子的运动》一文,指出了这个参考答案的错误,这是正确的。但是该文的计算和结论值得商榷。原文的解法,摘要如下。设一圆柱形匀强磁场区域中磁感应强度为B_1,电子
A charged particle in a uniform magnetic field in a uniform circular motion, if you suddenly double the magnetic field of the magnetic field, the particle rate and orbit radius will change how? Many review questions and workbooks on high school physics in this area Multiple-choice questions, and generally give a reference answer with the same rate and half the orbit radius. In the article “Talking about the Motion of Charged Particles in the Magnetic Field of Mutation” in the journal of the 11th issue of 1991, we pointed out the mistake of this reference answer. This is correct. However, the calculation and conclusion of this article are worth discussing. The original solution is summarized as follows. A cylindrical uniform magnetic field with a magnetic induction of B_1, electrons