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导棒问题是高中物理电磁学中最典型的题型,出题时可将力学、电磁学等知识溶为一体,能很好地考查学生的理解、推理、分析综合及应用数学知识处理物理问题的能力,其特点是综合性强、类型繁多、物理过程复杂,有利于对学生综合运用所学的知识从多层面、多角度、全方位分析问题和解决问题的能力考查,因此导棒问题是高考中的重点、热点问题．导棒问题在磁场中大致可分为五类:发电式导棒、电动式导棒、含电容式导棒、等长双动式综合导棒、不等长双导棒综合问题．
The problem of guide rods is the most typical type of problem in high school physical electromagnetism. When problems arise, the knowledge of mechanics and electromagnetism can be dissolved into a whole. It can well examine students’ understanding, reasoning, analysis, synthesis and application of mathematical knowledge to deal with physical problems. The ability is characterized by strong comprehensiveness, variety of types, and complex physical processes, which are conducive to the students’ comprehensive use of the learned knowledge from a multi-faceted, multi-angle, all-round ability to analyze problems and solve problems. Therefore, the guide rod problem is Focus, hot issues in the college entrance examination. The problem of guide rods can be roughly classified into five categories in magnetic fields: power generation guide rods, electric guide rods, capacitive guide rods, equal-length double-acting integrated guide rods, and unequal-length double guide rods.