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磁场、电磁感应等理论抽象,电动机、发电机结构复杂,它们的工作原理难于理解,这些都是同学们学完《电磁转换》这一章节留下的主要印象。把握本章的主要知识点,突破关键难点,基础知识严格过关,配以适量的练习是同学们学好这一章的重要方法。现以11、12、13年《电磁转换》中典型的中考试题为例,期望通过总结考点、分析解题方法能帮助同学们提高应用能力。考点一磁体与磁场磁体外部的磁感线总是从N极发出,回到S
Magnetic field, electromagnetic induction and other theoretical abstractions, motor, generator structure is complicated, and their working principle is difficult to understand, these are the students left the main impression of “electromagnetic conversion” chapter. Grasp the main points of this chapter, breaking through the key difficulties, the basic knowledge of strict clearance, together with the right amount of practice is an important way for students to learn this chapter. Take 11, 12, 13 years “electromagnetic conversion” in the typical middle school exam questions as an example, expect to summarize the test center, analysis of problem solving methods can help students improve their ability to apply. Test site a magnet and magnetic field Magnetic induction lines are always issued from the N pole, back to S