如图所示,一带正电粒子质量为m,带电量为q,从隔板ab上一个小孔p处与隔板成45度角垂直于磁感线射入磁感应强度为B的匀强磁场区,粒子初速度大小为v,则,(一)粒子经过多长时间再次到达隔板?
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![如图所示,一带正电粒子质量为m,带电量为q,从隔板ab上一个小孔p处与隔板成45度角垂直于磁感线射入磁感应强度为B的匀强磁场区,粒子初速度大小为v,则,(一)粒子经过多长时间再次到达隔板?](/uploads/image/z/14185284-60-4.jpg?t=%E5%A6%82%E5%9B%BE%E6%89%80%E7%A4%BA%2C%E4%B8%80%E5%B8%A6%E6%AD%A3%E7%94%B5%E7%B2%92%E5%AD%90%E8%B4%A8%E9%87%8F%E4%B8%BAm%2C%E5%B8%A6%E7%94%B5%E9%87%8F%E4%B8%BAq%2C%E4%BB%8E%E9%9A%94%E6%9D%BFab%E4%B8%8A%E4%B8%80%E4%B8%AA%E5%B0%8F%E5%AD%94p%E5%A4%84%E4%B8%8E%E9%9A%94%E6%9D%BF%E6%88%9045%E5%BA%A6%E8%A7%92%E5%9E%82%E7%9B%B4%E4%BA%8E%E7%A3%81%E6%84%9F%E7%BA%BF%E5%B0%84%E5%85%A5%E7%A3%81%E6%84%9F%E5%BA%94%E5%BC%BA%E5%BA%A6%E4%B8%BAB%E7%9A%84%E5%8C%80%E5%BC%BA%E7%A3%81%E5%9C%BA%E5%8C%BA%2C%E7%B2%92%E5%AD%90%E5%88%9D%E9%80%9F%E5%BA%A6%E5%A4%A7%E5%B0%8F%E4%B8%BAv%2C%E5%88%99%2C%EF%BC%88%E4%B8%80%EF%BC%89%E7%B2%92%E5%AD%90%E7%BB%8F%E8%BF%87%E5%A4%9A%E9%95%BF%E6%97%B6%E9%97%B4%E5%86%8D%E6%AC%A1%E5%88%B0%E8%BE%BE%E9%9A%94%E6%9D%BF%3F)
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