高中物理教材中 ,对“电磁感应”的教学 ,通常采取通过几个演示实验产生感应电流 ,然后对几个实验产生的现象进行分析归纳得出一般性结论 :只要穿过闭合回路中的磁通量发生变化 ,闭合回路中就会产生感应电流 .对于这个从个别到一般 ,从具体到抽象的认识转变 ,有些学生感到比较 In high school physics textbooks, the teaching of “electromagnetic induction” usually takes several demonstration experiments to generate induced currents, and then analyzes several experimentally generated phenomena to general conclusions: as long as the magnetic flux passes through the closed loop Changes, induced currents are generated in the closed loop. For this transition from individual to general, from concrete to abstract, some students feel that