如图所示电路,电源压一定 ,电阻R1:R2=5:8当只闭合S1,R1小号的电功率为10W.电压表V1 V2 示数之比U1:U2=1:2 当只闭合开关S2 R4消耗的电功率为1W.电压表V1示数为5V求(1) :当只闭合开关S2时 R3消耗的
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![如图所示电路,电源压一定 ,电阻R1:R2=5:8当只闭合S1,R1小号的电功率为10W.电压表V1 V2 示数之比U1:U2=1:2 当只闭合开关S2 R4消耗的电功率为1W.电压表V1示数为5V求(1) :当只闭合开关S2时 R3消耗的](/uploads/image/z/3629184-24-4.jpg?t=%E5%A6%82%E5%9B%BE%E6%89%80%E7%A4%BA%E7%94%B5%E8%B7%AF%2C%E7%94%B5%E6%BA%90%E5%8E%8B%E4%B8%80%E5%AE%9A+%2C%E7%94%B5%E9%98%BBR1%3AR2%3D5%3A8%E5%BD%93%E5%8F%AA%E9%97%AD%E5%90%88S1%2CR1%E5%B0%8F%E5%8F%B7%E7%9A%84%E7%94%B5%E5%8A%9F%E7%8E%87%E4%B8%BA10W.%E7%94%B5%E5%8E%8B%E8%A1%A8V1+V2+%E7%A4%BA%E6%95%B0%E4%B9%8B%E6%AF%94U1%3AU2%3D1%3A2+%E5%BD%93%E5%8F%AA%E9%97%AD%E5%90%88%E5%BC%80%E5%85%B3S2+R4%E6%B6%88%E8%80%97%E7%9A%84%E7%94%B5%E5%8A%9F%E7%8E%87%E4%B8%BA1W.%E7%94%B5%E5%8E%8B%E8%A1%A8V1%E7%A4%BA%E6%95%B0%E4%B8%BA5V%E6%B1%82%EF%BC%881%EF%BC%89+%EF%BC%9A%E5%BD%93%E5%8F%AA%E9%97%AD%E5%90%88%E5%BC%80%E5%85%B3S2%E6%97%B6+R3%E6%B6%88%E8%80%97%E7%9A%84)
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