物理选修3-1第二章检测试题如图,滑动变阻器R1的最大值为12Ω,定值电阻R2=12Ω,R3=2.5Ω,滑动变阻器的触头P处于滑动变阻器的中点,当S闭合时,电压表读数为3V,电源消耗功率为9W,求S断开时R1消耗的
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![物理选修3-1第二章检测试题如图,滑动变阻器R1的最大值为12Ω,定值电阻R2=12Ω,R3=2.5Ω,滑动变阻器的触头P处于滑动变阻器的中点,当S闭合时,电压表读数为3V,电源消耗功率为9W,求S断开时R1消耗的](/uploads/image/z/3172294-46-4.jpg?t=%E7%89%A9%E7%90%86%E9%80%89%E4%BF%AE3-1%E7%AC%AC%E4%BA%8C%E7%AB%A0%E6%A3%80%E6%B5%8B%E8%AF%95%E9%A2%98%E5%A6%82%E5%9B%BE%2C%E6%BB%91%E5%8A%A8%E5%8F%98%E9%98%BB%E5%99%A8R1%E7%9A%84%E6%9C%80%E5%A4%A7%E5%80%BC%E4%B8%BA12%CE%A9%2C%E5%AE%9A%E5%80%BC%E7%94%B5%E9%98%BBR2%3D12%CE%A9%2CR3%3D2.5%CE%A9%2C%E6%BB%91%E5%8A%A8%E5%8F%98%E9%98%BB%E5%99%A8%E7%9A%84%E8%A7%A6%E5%A4%B4P%E5%A4%84%E4%BA%8E%E6%BB%91%E5%8A%A8%E5%8F%98%E9%98%BB%E5%99%A8%E7%9A%84%E4%B8%AD%E7%82%B9%2C%E5%BD%93S%E9%97%AD%E5%90%88%E6%97%B6%2C%E7%94%B5%E5%8E%8B%E8%A1%A8%E8%AF%BB%E6%95%B0%E4%B8%BA3V%2C%E7%94%B5%E6%BA%90%E6%B6%88%E8%80%97%E5%8A%9F%E7%8E%87%E4%B8%BA9W%2C%E6%B1%82S%E6%96%AD%E5%BC%80%E6%97%B6R1%E6%B6%88%E8%80%97%E7%9A%84)
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