在高中教材中“法拉第电磁感应定律”是非常重要的,但抽象的磁场及磁通量的变化,让学生难以理解。我们可以多设计一些实验给予验证,帮助学生把它真正弄清楚。我们可把电流表接在螺线管的两端,形成闭合电路后,以不同的速度向螺线管中插入(或拨出)条形磁铁,磁铁运动越快,表针偏转 The “Faraday’s law of electromagnetic induction” in high school textbooks is very important, but abstract magnetic fields and magnetic flux changes make it difficult for students to understand. We can design more experiments to give validation and help students really understand it. We can connect the ammeter to the two ends of the solenoid to form a closed circuit and then insert (or dial out) the bar magnet into the solenoid at different speeds. The faster the magnet moves, the hand deflects.