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电磁场问题是历年高考试题中必考的知识点,在选择、实验、计算题中所占比重很大,并经常以压轴题出现,几乎决定高考的成败.复合场问题常把电场、磁场的概念与牛顿定律、动能定理、动量等力学、电学有关知识有机地联系在一起,还侧重于应用数学工具解决物理问题方面的考查.复合场:指电场、磁场、重力场并存,或其中两场并存,或分区存在.电场力和重力对带电体做功与路径无关,而磁场力对带电体不做功运动分析(1)当带电体所受合力为零时,将处于静止或匀
The problem of electromagnetic field is the knowledge point that must be tested in the college entrance examination exams over the years, which takes up a large proportion in the choice, experiment and calculation problems and often appears as the finale, which almost determines the success or failure of the college entrance examination. And Newton’s law, kinetic energy theorem, momentum and other mechanical, electrical related knowledge organically linked, but also focused on the application of mathematical tools to solve physical problems .Complex field: refers to the electric field, magnetic field, gravity field co-exist, or two co-exist , Or partition exist.Electric field force and gravity on the charged body has nothing to do with the work and path, and magnetic field force on the charged body does not do motion analysis (1) When the charged body by force is zero, will be at rest or even