高中物理题,求解答在竖直向下的磁感应强度为B的匀强磁场中,有两根水平放置相距L且足够长的平行金属导轨AB、CD,在导轨的A、C端连接一阻值为R的电阻,一根垂直导轨放置的金属棒ab,质量为m,
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![高中物理题,求解答在竖直向下的磁感应强度为B的匀强磁场中,有两根水平放置相距L且足够长的平行金属导轨AB、CD,在导轨的A、C端连接一阻值为R的电阻,一根垂直导轨放置的金属棒ab,质量为m,](/uploads/image/z/5637144-48-4.jpg?t=%E9%AB%98%E4%B8%AD%E7%89%A9%E7%90%86%E9%A2%98%2C%E6%B1%82%E8%A7%A3%E7%AD%94%E5%9C%A8%E7%AB%96%E7%9B%B4%E5%90%91%E4%B8%8B%E7%9A%84%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%E4%B8%AD%2C%E6%9C%89%E4%B8%A4%E6%A0%B9%E6%B0%B4%E5%B9%B3%E6%94%BE%E7%BD%AE%E7%9B%B8%E8%B7%9DL%E4%B8%94%E8%B6%B3%E5%A4%9F%E9%95%BF%E7%9A%84%E5%B9%B3%E8%A1%8C%E9%87%91%E5%B1%9E%E5%AF%BC%E8%BD%A8AB%E3%80%81CD%2C%E5%9C%A8%E5%AF%BC%E8%BD%A8%E7%9A%84A%E3%80%81C%E7%AB%AF%E8%BF%9E%E6%8E%A5%E4%B8%80%E9%98%BB%E5%80%BC%E4%B8%BAR%E7%9A%84%E7%94%B5%E9%98%BB%2C%E4%B8%80%E6%A0%B9%E5%9E%82%E7%9B%B4%E5%AF%BC%E8%BD%A8%E6%94%BE%E7%BD%AE%E7%9A%84%E9%87%91%E5%B1%9E%E6%A3%92ab%2C%E8%B4%A8%E9%87%8F%E4%B8%BAm%2C)
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