论文部分内容阅读
常见到这样一个问题:如图1所示的单摆摆长为L,摆球带正电q,放在匀强磁场中,摆球的摆动平面与磁场垂直,最大摆角为a。为了使摆球能正常摆动,则磁感应强度口的值有什么限制? 当带正电的单摆在磁场中摆动时,单摆不但受到重力和细线拉力,还受到洛仑兹力的作用。当单摆自右向左摆动时,洛仑兹力沿细线背离悬点方向;当单摆自左
Such a problem is commonly seen: As shown in Figure 1, the pendulum length is L, the pendulum ball is positively charged with q, and placed in a uniform magnetic field. The pendulum plane of the pendulum ball is perpendicular to the magnetic field, and the maximum pendulum angle is a. In order to make the swing ball swing normally, what is the limit of the value of the magnetic induction port? When the positive pendulum swings in the magnetic field, the pendulum is not only subjected to gravity and thin line tension, but also receives Lorentz force. When the pendulum swings from right to left, the Lorentz force deviates from the hanging point along the thin line; when the pendulum swings from left to right