一道有关高二物理的难题21.(14分)如图所示,MN、 PH为两根竖直放置、不计电阻的弧形金属导轨.NH间有阻值R=1Ω的电阻,整个装置处于磁感强度B=0.5T的匀强磁场中,一根质量为m=0.1kg、电阻不计
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![一道有关高二物理的难题21.(14分)如图所示,MN、 PH为两根竖直放置、不计电阻的弧形金属导轨.NH间有阻值R=1Ω的电阻,整个装置处于磁感强度B=0.5T的匀强磁场中,一根质量为m=0.1kg、电阻不计](/uploads/image/z/4264299-27-9.jpg?t=%E4%B8%80%E9%81%93%E6%9C%89%E5%85%B3%E9%AB%98%E4%BA%8C%E7%89%A9%E7%90%86%E7%9A%84%E9%9A%BE%E9%A2%9821%EF%BC%8E%EF%BC%8814%E5%88%86%EF%BC%89%E5%A6%82%E5%9B%BE%E6%89%80%E7%A4%BA%2CMN%E3%80%81+PH%E4%B8%BA%E4%B8%A4%E6%A0%B9%E7%AB%96%E7%9B%B4%E6%94%BE%E7%BD%AE%E3%80%81%E4%B8%8D%E8%AE%A1%E7%94%B5%E9%98%BB%E7%9A%84%E5%BC%A7%E5%BD%A2%E9%87%91%E5%B1%9E%E5%AF%BC%E8%BD%A8.NH%E9%97%B4%E6%9C%89%E9%98%BB%E5%80%BCR%3D1%CE%A9%E7%9A%84%E7%94%B5%E9%98%BB%2C%E6%95%B4%E4%B8%AA%E8%A3%85%E7%BD%AE%E5%A4%84%E4%BA%8E%E7%A3%81%E6%84%9F%E5%BC%BA%E5%BA%A6B%3D0.5T%E7%9A%84%E5%8C%80%E5%BC%BA%E7%A3%81%E5%9C%BA%E4%B8%AD%2C%E4%B8%80%E6%A0%B9%E8%B4%A8%E9%87%8F%E4%B8%BAm%3D0.1kg%E3%80%81%E7%94%B5%E9%98%BB%E4%B8%8D%E8%AE%A1)
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