如图所示,相距1/2L的两金属导轨FC、ED放在匀强磁场中,磁感应强度为B.长为L的裸导体棒PQ垂直置于导轨上两导轨的右端CD接一电阻R,导体棒PQ的电阻也为R,其他电阻不计.当PQ以v的速率向左移动时,
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![如图所示,相距1/2L的两金属导轨FC、ED放在匀强磁场中,磁感应强度为B.长为L的裸导体棒PQ垂直置于导轨上两导轨的右端CD接一电阻R,导体棒PQ的电阻也为R,其他电阻不计.当PQ以v的速率向左移动时,](/uploads/image/z/8108775-63-5.jpg?t=%E5%A6%82%E5%9B%BE%E6%89%80%E7%A4%BA%2C%E7%9B%B8%E8%B7%9D1%2F2L%E7%9A%84%E4%B8%A4%E9%87%91%E5%B1%9E%E5%AF%BC%E8%BD%A8FC%E3%80%81ED%E6%94%BE%E5%9C%A8%E5%8C%80%E5%BC%BA%E7%A3%81%E5%9C%BA%E4%B8%AD%2C%E7%A3%81%E6%84%9F%E5%BA%94%E5%BC%BA%E5%BA%A6%E4%B8%BAB.%E9%95%BF%E4%B8%BAL%E7%9A%84%E8%A3%B8%E5%AF%BC%E4%BD%93%E6%A3%92PQ%E5%9E%82%E7%9B%B4%E7%BD%AE%E4%BA%8E%E5%AF%BC%E8%BD%A8%E4%B8%8A%E4%B8%A4%E5%AF%BC%E8%BD%A8%E7%9A%84%E5%8F%B3%E7%AB%AFCD%E6%8E%A5%E4%B8%80%E7%94%B5%E9%98%BBR%2C%E5%AF%BC%E4%BD%93%E6%A3%92PQ%E7%9A%84%E7%94%B5%E9%98%BB%E4%B9%9F%E4%B8%BAR%2C%E5%85%B6%E4%BB%96%E7%94%B5%E9%98%BB%E4%B8%8D%E8%AE%A1.%E5%BD%93PQ%E4%BB%A5v%E7%9A%84%E9%80%9F%E7%8E%87%E5%90%91%E5%B7%A6%E7%A7%BB%E5%8A%A8%E6%97%B6%2C)
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