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1引言电磁感应定律是中学物理教学中的重要内容,教材中都是介绍三种不同类型实验:1.把导体AB的两端分别用两条导线接在电流表的两个线柱上,组成闭合电路,让导体AB在磁场中切割磁感线运动,产生感应电流(如图1).图12.把螺线圈的两端接在电流表上,组成闭合回路,向螺线圈插入或取出
1 Introduction The law of electromagnetic induction is an important part of middle school physics teaching. Three different types of experiments are introduced in the textbook: 1. The two ends of the conductor AB are connected to the two posts of the ammeter by two wires, respectively. The circuit allows the conductor AB to cut the magnetic induction line motion in the magnetic field and generate the induced current (Figure 1). Figure 12. Connect the two ends of the solenoid coil to the ammeter to form a closed loop and insert or remove the solenoid coil.