电阻R1和R2阻值之比为1:2,分别把它们串联和并联在同一电源的两端,在相同时间里电流分别通过两电阻,产生的热量之比是?A.1:3 B.2:9 C.1:2 D.1:4
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![电阻R1和R2阻值之比为1:2,分别把它们串联和并联在同一电源的两端,在相同时间里电流分别通过两电阻,产生的热量之比是?A.1:3 B.2:9 C.1:2 D.1:4](/uploads/image/z/5193194-50-4.jpg?t=%E7%94%B5%E9%98%BBR1%E5%92%8CR2%E9%98%BB%E5%80%BC%E4%B9%8B%E6%AF%94%E4%B8%BA1%3A2%2C%E5%88%86%E5%88%AB%E6%8A%8A%E5%AE%83%E4%BB%AC%E4%B8%B2%E8%81%94%E5%92%8C%E5%B9%B6%E8%81%94%E5%9C%A8%E5%90%8C%E4%B8%80%E7%94%B5%E6%BA%90%E7%9A%84%E4%B8%A4%E7%AB%AF%2C%E5%9C%A8%E7%9B%B8%E5%90%8C%E6%97%B6%E9%97%B4%E9%87%8C%E7%94%B5%E6%B5%81%E5%88%86%E5%88%AB%E9%80%9A%E8%BF%87%E4%B8%A4%E7%94%B5%E9%98%BB%2C%E4%BA%A7%E7%94%9F%E7%9A%84%E7%83%AD%E9%87%8F%E4%B9%8B%E6%AF%94%E6%98%AF%3FA.1%EF%BC%9A3+B.2%EF%BC%9A9+C.1%EF%BC%9A2+D.1%EF%BC%9A4)
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