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楞次定律课是电磁感应中的难点也是重点,原因在于涉及的因素多(有原磁场,感应电流的磁场,磁通量的变化,电流方向等),而且实验条件较多、规律比较难以总结,以下介绍了课堂上常用实验手段并结合学生状况指出实验弊端,最后通过改进的创新性实验手段让楞次定律更容易为学生所理解并有更好的课堂效果。
Lenz’s law course is the difficult point in electromagnetic induction is also the focus, because of many factors involved (the original magnetic field, the induced magnetic field, the magnetic flux changes, the current direction, etc.), and the experimental conditions are more difficult to summarize the law, the following This paper introduces the commonly used experimental methods in class and points out the disadvantages of the experiment according to the students ’condition. Finally, Lenz’ s law is easier to be understood by students and has better classroom effect through improved and innovative experimental methods.