电磁感应知识在结构上具有承上启下的作用,承上——综合力学、电路、电场、能量、磁场等知识,启下——解释交流电、电磁波等知识;电磁感应知识在因果关系的分析、推理、判断,既是知识学习的重点,也是知识学习的难点.鉴此,通过以下知识索引,立足基础,理清 The knowledge of electromagnetic induction has a bearing on the structure, inheritance - comprehensive mechanics, circuit, electric field, energy, magnetic field and other knowledge, Kai - explain AC, electromagnetic waves and other knowledge; knowledge of electromagnetic induction in causal analysis, reasoning, Judgment is not only the focus of knowledge learning, but also the difficulty of knowledge learning.Through this, through the following knowledge index, based on the foundation to sort out