如图甲,平行导轨MN、PQ水平放置,电阻不计.两导轨间距d=10cm,导体棒ab、cd放在导轨上,并与导轨垂直.每根棒在导轨间的部分,电阻均为R=1.0Ω.用长为L=20cm的绝缘丝线将两棒系住.整个装置处在匀强
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![如图甲,平行导轨MN、PQ水平放置,电阻不计.两导轨间距d=10cm,导体棒ab、cd放在导轨上,并与导轨垂直.每根棒在导轨间的部分,电阻均为R=1.0Ω.用长为L=20cm的绝缘丝线将两棒系住.整个装置处在匀强](/uploads/image/z/8585085-21-5.jpg?t=%E5%A6%82%E5%9B%BE%E7%94%B2%2C%E5%B9%B3%E8%A1%8C%E5%AF%BC%E8%BD%A8MN%E3%80%81PQ%E6%B0%B4%E5%B9%B3%E6%94%BE%E7%BD%AE%2C%E7%94%B5%E9%98%BB%E4%B8%8D%E8%AE%A1.%E4%B8%A4%E5%AF%BC%E8%BD%A8%E9%97%B4%E8%B7%9Dd%3D10cm%2C%E5%AF%BC%E4%BD%93%E6%A3%92ab%E3%80%81cd%E6%94%BE%E5%9C%A8%E5%AF%BC%E8%BD%A8%E4%B8%8A%2C%E5%B9%B6%E4%B8%8E%E5%AF%BC%E8%BD%A8%E5%9E%82%E7%9B%B4.%E6%AF%8F%E6%A0%B9%E6%A3%92%E5%9C%A8%E5%AF%BC%E8%BD%A8%E9%97%B4%E7%9A%84%E9%83%A8%E5%88%86%2C%E7%94%B5%E9%98%BB%E5%9D%87%E4%B8%BAR%3D1.0%CE%A9.%E7%94%A8%E9%95%BF%E4%B8%BAL%3D20cm%E7%9A%84%E7%BB%9D%E7%BC%98%E4%B8%9D%E7%BA%BF%E5%B0%86%E4%B8%A4%E6%A3%92%E7%B3%BB%E4%BD%8F.%E6%95%B4%E4%B8%AA%E8%A3%85%E7%BD%AE%E5%A4%84%E5%9C%A8%E5%8C%80%E5%BC%BA)
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