如图所示(http://i3.6.cn/cvbnm/99/2f/11/478d86deb88cce27430b655a03a5a191.jpg),MN为两个匀强磁场的分界面,两磁场都是垂直于平面向里的磁场,且两磁场的磁感应强度大小关系为B1=2B2,一带电+q,质量为m的例子
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![如图所示(http://i3.6.cn/cvbnm/99/2f/11/478d86deb88cce27430b655a03a5a191.jpg),MN为两个匀强磁场的分界面,两磁场都是垂直于平面向里的磁场,且两磁场的磁感应强度大小关系为B1=2B2,一带电+q,质量为m的例子](/uploads/image/z/8487777-57-7.jpg?t=%E5%A6%82%E5%9B%BE%E6%89%80%E7%A4%BA%EF%BC%88http%3A%2F%2Fi3.6.cn%2Fcvbnm%2F99%2F2f%2F11%2F478d86deb88cce27430b655a03a5a191.jpg%EF%BC%89%2CMN%E4%B8%BA%E4%B8%A4%E4%B8%AA%E5%8C%80%E5%BC%BA%E7%A3%81%E5%9C%BA%E7%9A%84%E5%88%86%E7%95%8C%E9%9D%A2%2C%E4%B8%A4%E7%A3%81%E5%9C%BA%E9%83%BD%E6%98%AF%E5%9E%82%E7%9B%B4%E4%BA%8E%E5%B9%B3%E9%9D%A2%E5%90%91%E9%87%8C%E7%9A%84%E7%A3%81%E5%9C%BA%2C%E4%B8%94%E4%B8%A4%E7%A3%81%E5%9C%BA%E7%9A%84%E7%A3%81%E6%84%9F%E5%BA%94%E5%BC%BA%E5%BA%A6%E5%A4%A7%E5%B0%8F%E5%85%B3%E7%B3%BB%E4%B8%BAB1%3D2B2%2C%E4%B8%80%E5%B8%A6%E7%94%B5%2Bq%2C%E8%B4%A8%E9%87%8F%E4%B8%BAm%E7%9A%84%E4%BE%8B%E5%AD%90)
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