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电磁感应定律的发现不但使人们对电磁现象的理解更为深刻,并且由此所引发了第二次工业革命,使人类对自然的认识和利用进入了新的阶段.电磁感应现象及电磁感应定律是高中物理教学的重要内容,教材中这部分内容是通过演示实验从定性到定量逐步展开的,因此教师做好演示实验对于这部分的教学就显得特别重要.如何做好这些演示实验是广大教师一直关注的问题.其中单根导线切割磁感线运动产生感生电流的实验,许多教师感到头痛.究其原因,主要是中学所用的演示检流计的灵敏度太低,不能测出单根导
The discovery of the law of electromagnetic induction not only made people understand the electromagnetic phenomenon more deeply, but also triggered a second industrial revolution, which made human’s understanding and utilization of nature enter a new stage. Electromagnetic induction phenomenon and electromagnetic induction law It is an important part of high school physics teaching. This part of the teaching material is gradually developed from qualitative to quantitative through demonstration experiments. Therefore, it is particularly important for teachers to do a demonstration experiment for this part of the teaching. How to do these demonstration experiments is the majority of teachers Concerned about the problem. Many teachers feel headaches because of the induced current induced by the movement of magnetic wire in a single wire. The main reason is that the sensitivity of the demo galvanometer used in middle school is too low to measure a single guide.