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如何判断电磁的方向
更新时间: 2020-10-13 00:00:00  

有磁感线的就是其切线方向;直导线用右手握住导线,拇指指向电流方向,磁场就是绕线圈环状的,四个手指指尖方向即磁场方向;圆形线圈,用右手握住线圈,拇指竖起,四个指尖指向电流方向,拇指所指方向即磁场的北极。

关键词: 如何 判断 电磁 方向

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