急 大家快进来救命 小的在这谢谢了光滑的平行导轨倾角为x,处在磁感应强度为B的匀强磁场中,B方向竖直向下,导轨中接入电势为E,内阻为r的直流电源及定值电阻R,电路中其余电阻不计.将质量
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![急 大家快进来救命 小的在这谢谢了光滑的平行导轨倾角为x,处在磁感应强度为B的匀强磁场中,B方向竖直向下,导轨中接入电势为E,内阻为r的直流电源及定值电阻R,电路中其余电阻不计.将质量](/uploads/image/z/14708067-51-7.jpg?t=%E6%80%A5+%E5%A4%A7%E5%AE%B6%E5%BF%AB%E8%BF%9B%E6%9D%A5%E6%95%91%E5%91%BD+%E5%B0%8F%E7%9A%84%E5%9C%A8%E8%BF%99%E8%B0%A2%E8%B0%A2%E4%BA%86%E5%85%89%E6%BB%91%E7%9A%84%E5%B9%B3%E8%A1%8C%E5%AF%BC%E8%BD%A8%E5%80%BE%E8%A7%92%E4%B8%BAx%2C%E5%A4%84%E5%9C%A8%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%2CB%E6%96%B9%E5%90%91%E7%AB%96%E7%9B%B4%E5%90%91%E4%B8%8B%2C%E5%AF%BC%E8%BD%A8%E4%B8%AD%E6%8E%A5%E5%85%A5%E7%94%B5%E5%8A%BF%E4%B8%BAE%2C%E5%86%85%E9%98%BB%E4%B8%BAr%E7%9A%84%E7%9B%B4%E6%B5%81%E7%94%B5%E6%BA%90%E5%8F%8A%E5%AE%9A%E5%80%BC%E7%94%B5%E9%98%BBR%2C%E7%94%B5%E8%B7%AF%E4%B8%AD%E5%85%B6%E4%BD%99%E7%94%B5%E9%98%BB%E4%B8%8D%E8%AE%A1.%E5%B0%86%E8%B4%A8%E9%87%8F)
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