带电粒子在复合场中的运动在日常生活中学生难得一见;阴极射线管能很好地向学生展示电子在磁场和电场中的运动。但要演示电子在复合场中的运动时,阴极射线管在操作上存在困难,我们设计的这一实验操作简单、现象明显、说服力强,能很好地向学生展示带电粒子在复合场中的运动。 The movement of charged particles in the composite field is rare for students in everyday life; the cathode ray tube can show students well the movement of electrons in magnetic fields and electric fields. However, in order to demonstrate the movement of electrons in the composite field, the cathode ray tube is difficult to operate. The experiment we designed is simple, phenomenal, and persuasive. It can show students well that charged particles are in the complex field. exercise.