如图所示,一条长为l的绝缘体细线上端固定,下端栓质量为m的带电小球,将它置于一个水平方向向右,大小为E的匀强电场中,已知细线向右偏到和竖直成α角时,小球处于静止平衡状态,若将小球向
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![如图所示,一条长为l的绝缘体细线上端固定,下端栓质量为m的带电小球,将它置于一个水平方向向右,大小为E的匀强电场中,已知细线向右偏到和竖直成α角时,小球处于静止平衡状态,若将小球向](/uploads/image/z/8085618-18-8.jpg?t=%E5%A6%82%E5%9B%BE%E6%89%80%E7%A4%BA%2C%E4%B8%80%E6%9D%A1%E9%95%BF%E4%B8%BAl%E7%9A%84%E7%BB%9D%E7%BC%98%E4%BD%93%E7%BB%86%E7%BA%BF%E4%B8%8A%E7%AB%AF%E5%9B%BA%E5%AE%9A%2C%E4%B8%8B%E7%AB%AF%E6%A0%93%E8%B4%A8%E9%87%8F%E4%B8%BAm%E7%9A%84%E5%B8%A6%E7%94%B5%E5%B0%8F%E7%90%83%2C%E5%B0%86%E5%AE%83%E7%BD%AE%E4%BA%8E%E4%B8%80%E4%B8%AA%E6%B0%B4%E5%B9%B3%E6%96%B9%E5%90%91%E5%90%91%E5%8F%B3%2C%E5%A4%A7%E5%B0%8F%E4%B8%BAE%E7%9A%84%E5%8C%80%E5%BC%BA%E7%94%B5%E5%9C%BA%E4%B8%AD%2C%E5%B7%B2%E7%9F%A5%E7%BB%86%E7%BA%BF%E5%90%91%E5%8F%B3%E5%81%8F%E5%88%B0%E5%92%8C%E7%AB%96%E7%9B%B4%E6%88%90%CE%B1%E8%A7%92%E6%97%B6%2C%E5%B0%8F%E7%90%83%E5%A4%84%E4%BA%8E%E9%9D%99%E6%AD%A2%E5%B9%B3%E8%A1%A1%E7%8A%B6%E6%80%81%2C%E8%8B%A5%E5%B0%86%E5%B0%8F%E7%90%83%E5%90%91)
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