带电粒子荷质比的测定历来是高中段电磁学的重要内容,同时也是高考考察的一大热点问题,现将带电粒子荷质比测定的常见方法简单归纳.1.双电容器法测定电子比荷例如图1所示.在真空管中由阴极K发射出电子,其初速度可以忽略不计,此电子被阴极K与阳极A间的电场加速后穿过屏障D1 Charge-to-particle charge-mass ratio measurement has always been an important part of the high school electromagnetism, but also a major hot topic of the college entrance examination study, now the common method of determining the charge-to-charge ratio of quality is summarized.1 double capacitor method for the determination of electron specific charge For example, as shown in Figure 1. In a vacuum tube by the cathode K emit electrons, the initial velocity is negligible, the electron is the cathode K and the anode A accelerated electric field across the barrier D1