如图3所示,在光滑绝缘的水平桌面上固定放置光滑绝缘的挡板ABCD,AB段为直线挡板,BCD段是半径为R的圆弧挡板,挡板处于场强为E的匀强电场中,电场方向与圆直径MN平行.现有一带电荷量为q、质量
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![如图3所示,在光滑绝缘的水平桌面上固定放置光滑绝缘的挡板ABCD,AB段为直线挡板,BCD段是半径为R的圆弧挡板,挡板处于场强为E的匀强电场中,电场方向与圆直径MN平行.现有一带电荷量为q、质量](/uploads/image/z/11411934-6-4.jpg?t=%E5%A6%82%E5%9B%BE3%E6%89%80%E7%A4%BA%2C%E5%9C%A8%E5%85%89%E6%BB%91%E7%BB%9D%E7%BC%98%E7%9A%84%E6%B0%B4%E5%B9%B3%E6%A1%8C%E9%9D%A2%E4%B8%8A%E5%9B%BA%E5%AE%9A%E6%94%BE%E7%BD%AE%E5%85%89%E6%BB%91%E7%BB%9D%E7%BC%98%E7%9A%84%E6%8C%A1%E6%9D%BFABCD%2CAB%E6%AE%B5%E4%B8%BA%E7%9B%B4%E7%BA%BF%E6%8C%A1%E6%9D%BF%2CBCD%E6%AE%B5%E6%98%AF%E5%8D%8A%E5%BE%84%E4%B8%BAR%E7%9A%84%E5%9C%86%E5%BC%A7%E6%8C%A1%E6%9D%BF%2C%E6%8C%A1%E6%9D%BF%E5%A4%84%E4%BA%8E%E5%9C%BA%E5%BC%BA%E4%B8%BAE%E7%9A%84%E5%8C%80%E5%BC%BA%E7%94%B5%E5%9C%BA%E4%B8%AD%2C%E7%94%B5%E5%9C%BA%E6%96%B9%E5%90%91%E4%B8%8E%E5%9C%86%E7%9B%B4%E5%BE%84MN%E5%B9%B3%E8%A1%8C.%E7%8E%B0%E6%9C%89%E4%B8%80%E5%B8%A6%E7%94%B5%E8%8D%B7%E9%87%8F%E4%B8%BAq%E3%80%81%E8%B4%A8%E9%87%8F)
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