如图知电源电压不变,R1为定值电阻,R2为滑动变阻器,闭合开关S,当滑动变阻器由中点滑到b端时,电压表V2示数比为3:4;求(1)两次状态下电阻R1的电功率比是_______,滑动变阻器R2的电功率比是_____
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![如图知电源电压不变,R1为定值电阻,R2为滑动变阻器,闭合开关S,当滑动变阻器由中点滑到b端时,电压表V2示数比为3:4;求(1)两次状态下电阻R1的电功率比是_______,滑动变阻器R2的电功率比是_____](/uploads/image/z/2232885-21-5.jpg?t=%E5%A6%82%E5%9B%BE%E7%9F%A5%E7%94%B5%E6%BA%90%E7%94%B5%E5%8E%8B%E4%B8%8D%E5%8F%98%2CR1%E4%B8%BA%E5%AE%9A%E5%80%BC%E7%94%B5%E9%98%BB%2CR2%E4%B8%BA%E6%BB%91%E5%8A%A8%E5%8F%98%E9%98%BB%E5%99%A8%2C%E9%97%AD%E5%90%88%E5%BC%80%E5%85%B3S%2C%E5%BD%93%E6%BB%91%E5%8A%A8%E5%8F%98%E9%98%BB%E5%99%A8%E7%94%B1%E4%B8%AD%E7%82%B9%E6%BB%91%E5%88%B0b%E7%AB%AF%E6%97%B6%2C%E7%94%B5%E5%8E%8B%E8%A1%A8V2%E7%A4%BA%E6%95%B0%E6%AF%94%E4%B8%BA3%3A4%EF%BC%9B%E6%B1%82%EF%BC%881%EF%BC%89%E4%B8%A4%E6%AC%A1%E7%8A%B6%E6%80%81%E4%B8%8B%E7%94%B5%E9%98%BBR1%E7%9A%84%E7%94%B5%E5%8A%9F%E7%8E%87%E6%AF%94%E6%98%AF_______%2C%E6%BB%91%E5%8A%A8%E5%8F%98%E9%98%BB%E5%99%A8R2%E7%9A%84%E7%94%B5%E5%8A%9F%E7%8E%87%E6%AF%94%E6%98%AF_____)
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