电学物理题,求高人指点!如图所示电路中,电源电压不变,当①②均为电压表时,S闭合后,V1:V2=7:12,R1消耗功率为P1,当①②均为电流表时,S闭合后,A1:A2=16:21,此时电阻R2消耗的电功率为P2',求P1:P2'
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![电学物理题,求高人指点!如图所示电路中,电源电压不变,当①②均为电压表时,S闭合后,V1:V2=7:12,R1消耗功率为P1,当①②均为电流表时,S闭合后,A1:A2=16:21,此时电阻R2消耗的电功率为P2',求P1:P2'](/uploads/image/z/13187849-41-9.jpg?t=%E7%94%B5%E5%AD%A6%E7%89%A9%E7%90%86%E9%A2%98%2C%E6%B1%82%E9%AB%98%E4%BA%BA%E6%8C%87%E7%82%B9%21%E5%A6%82%E5%9B%BE%E6%89%80%E7%A4%BA%E7%94%B5%E8%B7%AF%E4%B8%AD%2C%E7%94%B5%E6%BA%90%E7%94%B5%E5%8E%8B%E4%B8%8D%E5%8F%98%2C%E5%BD%93%E2%91%A0%E2%91%A1%E5%9D%87%E4%B8%BA%E7%94%B5%E5%8E%8B%E8%A1%A8%E6%97%B6%2CS%E9%97%AD%E5%90%88%E5%90%8E%2CV1%3AV2%3D7%3A12%2CR1%E6%B6%88%E8%80%97%E5%8A%9F%E7%8E%87%E4%B8%BAP1%2C%E5%BD%93%E2%91%A0%E2%91%A1%E5%9D%87%E4%B8%BA%E7%94%B5%E6%B5%81%E8%A1%A8%E6%97%B6%2CS%E9%97%AD%E5%90%88%E5%90%8E%2CA1%3AA2%3D16%3A21%2C%E6%AD%A4%E6%97%B6%E7%94%B5%E9%98%BBR2%E6%B6%88%E8%80%97%E7%9A%84%E7%94%B5%E5%8A%9F%E7%8E%87%E4%B8%BAP2%27%2C%E6%B1%82P1%EF%BC%9AP2%27)
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