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在高中电磁学中,金属杆沿金属框架或平行金属导轨运动是较为常见的一类题型,在历年高考试题中都经常出现.在解决这类问题时,运动过程及最终状态对解题起到至关重要的作用.下面笔者就几种比较典型的问题,分别分析它们的运动过程及最终状态,以找出其中蕴含的规律.在下表所示的图1至图6中,质量均为m、有效电阻均为R的A杆和B杆,可以在相互平行的光滑水平轨道(宽、窄轨道均足够长,
In high school electromagnetism, the movement of the metal rod along the metal frame or the parallel metal guideway is a common type of questions, which are often found in college entrance examination questions over the years. In solving these problems, the movement process and the final state To the crucial role of the following author on some of the more typical problems, respectively, analysis of their movement process and the final state, in order to find out the inherent law.In the table below shown in Figure 1 to 6, the quality is m, the effective resistance is R A rod and B rod can be parallel to each other smooth horizontal track (wide and narrow orbit are long enough,