如图所示,ef,gh为水平放置的足够长的平行光滑导轨,导轨间距为L=1m,导轨左端连接一个R=2Ω的电阻,将一根质量为0.2kg的金属棒cd垂直地放置导轨上,且与导轨接触良好,导轨与金属棒的电阻均不计,
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![如图所示,ef,gh为水平放置的足够长的平行光滑导轨,导轨间距为L=1m,导轨左端连接一个R=2Ω的电阻,将一根质量为0.2kg的金属棒cd垂直地放置导轨上,且与导轨接触良好,导轨与金属棒的电阻均不计,](/uploads/image/z/6384690-18-0.jpg?t=%E5%A6%82%E5%9B%BE%E6%89%80%E7%A4%BA%2Cef%2Cgh%E4%B8%BA%E6%B0%B4%E5%B9%B3%E6%94%BE%E7%BD%AE%E7%9A%84%E8%B6%B3%E5%A4%9F%E9%95%BF%E7%9A%84%E5%B9%B3%E8%A1%8C%E5%85%89%E6%BB%91%E5%AF%BC%E8%BD%A8%2C%E5%AF%BC%E8%BD%A8%E9%97%B4%E8%B7%9D%E4%B8%BAL%3D1m%2C%E5%AF%BC%E8%BD%A8%E5%B7%A6%E7%AB%AF%E8%BF%9E%E6%8E%A5%E4%B8%80%E4%B8%AAR%3D2%CE%A9%E7%9A%84%E7%94%B5%E9%98%BB%2C%E5%B0%86%E4%B8%80%E6%A0%B9%E8%B4%A8%E9%87%8F%E4%B8%BA0.2kg%E7%9A%84%E9%87%91%E5%B1%9E%E6%A3%92cd%E5%9E%82%E7%9B%B4%E5%9C%B0%E6%94%BE%E7%BD%AE%E5%AF%BC%E8%BD%A8%E4%B8%8A%2C%E4%B8%94%E4%B8%8E%E5%AF%BC%E8%BD%A8%E6%8E%A5%E8%A7%A6%E8%89%AF%E5%A5%BD%2C%E5%AF%BC%E8%BD%A8%E4%B8%8E%E9%87%91%E5%B1%9E%E6%A3%92%E7%9A%84%E7%94%B5%E9%98%BB%E5%9D%87%E4%B8%8D%E8%AE%A1%2C)
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