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钕铁硼磁铁是当今世界上磁性最强的新一代稀土永磁材料,有“磁王”之美誉。用它和日常生活器件进行精巧的组合,可以做出效果明显的电磁感应实验,让人耳目一新。一、电磁相互作用演示器1.实验装置。实验装置如图1、图2所示。2.实验装置原理、特点及用途。(1)原理。当磁铁朝铝片运动时,铝片回路的磁通量增加,产生感应电流,感应电流磁场的方向与原磁场的方向相反而排斥,使铝片倾倒;当磁铁远离铝
NdFeB magnets are the most powerful new generation of rare earth permanent magnet materials in the world today, and have the reputation of “magnetic king”. Use it and daily life devices for sophisticated combination, you can make a significant effect of electromagnetic induction experiments, refreshing. First, the electromagnetic interaction demonstrator 1. Experimental device. The experimental setup is shown in Figure 1 and Figure 2. 2. Experimental device principle, characteristics and uses. (1) principle. When the magnet moves toward the aluminum piece, the magnetic flux of the aluminum piece increases and induces a current. The direction of the induced magnetic field is opposite to the direction of the original magnetic field to make the aluminum piece dump. When the magnet is away from the aluminum