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磁铁的正负极可以用颜色判断吗
更新时间: 2020-10-02 00:00:00  

1、颜色没有区别,磁铁不是用正负极区分的,而是用南北极区分。

2、北极的定义是磁铁在随意旋转后它的北极指向地球的北极。同样,磁铁的南极也指向地球的南极。

3、只凭眼睛是无法进行分辨,可以使用指南针贴近磁铁,指向地球北极的指针会指向磁铁的南极。

关键词: 磁铁 负极 可以 颜色 判断

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