甲,乙两根电阻丝的阻值分别为R和R',将它们分别接在电压为U的电源两端,放出相同的热量所需的时间分别为t ,t'.现将它们串联在电压为U的电路里,仍放出同样的热量,所需的时间应为A.t B.tt' C.t'
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![甲,乙两根电阻丝的阻值分别为R和R',将它们分别接在电压为U的电源两端,放出相同的热量所需的时间分别为t ,t'.现将它们串联在电压为U的电路里,仍放出同样的热量,所需的时间应为A.t B.tt' C.t'](/uploads/image/z/6620833-1-3.jpg?t=%E7%94%B2%2C%E4%B9%99%E4%B8%A4%E6%A0%B9%E7%94%B5%E9%98%BB%E4%B8%9D%E7%9A%84%E9%98%BB%E5%80%BC%E5%88%86%E5%88%AB%E4%B8%BAR%E5%92%8CR%27%2C%E5%B0%86%E5%AE%83%E4%BB%AC%E5%88%86%E5%88%AB%E6%8E%A5%E5%9C%A8%E7%94%B5%E5%8E%8B%E4%B8%BAU%E7%9A%84%E7%94%B5%E6%BA%90%E4%B8%A4%E7%AB%AF%2C%E6%94%BE%E5%87%BA%E7%9B%B8%E5%90%8C%E7%9A%84%E7%83%AD%E9%87%8F%E6%89%80%E9%9C%80%E7%9A%84%E6%97%B6%E9%97%B4%E5%88%86%E5%88%AB%E4%B8%BAt+%2Ct%27.%E7%8E%B0%E5%B0%86%E5%AE%83%E4%BB%AC%E4%B8%B2%E8%81%94%E5%9C%A8%E7%94%B5%E5%8E%8B%E4%B8%BAU%E7%9A%84%E7%94%B5%E8%B7%AF%E9%87%8C%2C%E4%BB%8D%E6%94%BE%E5%87%BA%E5%90%8C%E6%A0%B7%E7%9A%84%E7%83%AD%E9%87%8F%2C%E6%89%80%E9%9C%80%E7%9A%84%E6%97%B6%E9%97%B4%E5%BA%94%E4%B8%BAA.t+B.tt%27+C.t%27)
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