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在现行物理第二册P137关于磁感线实验中,我认为有以下不足之处:1.实验时,由于玻璃板水平放置,远处学生不易看清.2.在实验过程中,细铁屑磁化后的分布情况,不易全面得出结论;磁感线布满磁体周围整个空间,并不是在一个平面上.3.轻敲玻璃板过程中,由于晃动铁屑转动不均匀不能直观展现磁场分布.
In the current physical second book P137 about the magnetic induction line experiment, I think there are the following deficiencies: 1. During the experiment, because the glass plate is placed horizontally, students in distant places are not easy to see. 2. During the experiment, fine iron filings After the magnetization distribution, it is not easy to draw conclusions in a comprehensive way; magnetic induction lines cover the entire space around the magnets, not on a plane. 3. In the process of tapping the glass plate, the magnetic field distribution cannot be visualized due to uneven rotation of the iron shavings. .