关于电磁感应的题目如图甲所示,光滑且足够长的平行金属导轨MN和PQ固定在同一水平面上,两导轨间距L=0.2m,电阻R=0.4欧,导轨上停放一质量m=0.1kg、电阻r=0.1欧的金属杆,导轨电阻忽略不计,整个装
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![关于电磁感应的题目如图甲所示,光滑且足够长的平行金属导轨MN和PQ固定在同一水平面上,两导轨间距L=0.2m,电阻R=0.4欧,导轨上停放一质量m=0.1kg、电阻r=0.1欧的金属杆,导轨电阻忽略不计,整个装](/uploads/image/z/5528090-2-0.jpg?t=%E5%85%B3%E4%BA%8E%E7%94%B5%E7%A3%81%E6%84%9F%E5%BA%94%E7%9A%84%E9%A2%98%E7%9B%AE%E5%A6%82%E5%9B%BE%E7%94%B2%E6%89%80%E7%A4%BA%2C%E5%85%89%E6%BB%91%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%A8MN%E5%92%8CPQ%E5%9B%BA%E5%AE%9A%E5%9C%A8%E5%90%8C%E4%B8%80%E6%B0%B4%E5%B9%B3%E9%9D%A2%E4%B8%8A%2C%E4%B8%A4%E5%AF%BC%E8%BD%A8%E9%97%B4%E8%B7%9DL%3D0.2m%2C%E7%94%B5%E9%98%BBR%3D0.4%E6%AC%A7%2C%E5%AF%BC%E8%BD%A8%E4%B8%8A%E5%81%9C%E6%94%BE%E4%B8%80%E8%B4%A8%E9%87%8Fm%3D0.1kg%E3%80%81%E7%94%B5%E9%98%BBr%3D0.1%E6%AC%A7%E7%9A%84%E9%87%91%E5%B1%9E%E6%9D%86%2C%E5%AF%BC%E8%BD%A8%E7%94%B5%E9%98%BB%E5%BF%BD%E7%95%A5%E4%B8%8D%E8%AE%A1%2C%E6%95%B4%E4%B8%AA%E8%A3%85)
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