1.R1与R2以某种方式连接时,P1=108W.以另一种方式连接时,P1'=9W,求此时R2的电功率2.一个“220V,100W”的灯泡用较长导线接在220V的电源上,P'=90.25W,求导线的电功率
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![1.R1与R2以某种方式连接时,P1=108W.以另一种方式连接时,P1'=9W,求此时R2的电功率2.一个“220V,100W”的灯泡用较长导线接在220V的电源上,P'=90.25W,求导线的电功率](/uploads/image/z/1746318-30-8.jpg?t=1.R1%E4%B8%8ER2%E4%BB%A5%E6%9F%90%E7%A7%8D%E6%96%B9%E5%BC%8F%E8%BF%9E%E6%8E%A5%E6%97%B6%2CP1%3D108W.%E4%BB%A5%E5%8F%A6%E4%B8%80%E7%A7%8D%E6%96%B9%E5%BC%8F%E8%BF%9E%E6%8E%A5%E6%97%B6%2CP1%27%3D9W%2C%E6%B1%82%E6%AD%A4%E6%97%B6R2%E7%9A%84%E7%94%B5%E5%8A%9F%E7%8E%872.%E4%B8%80%E4%B8%AA%E2%80%9C220V%2C100W%E2%80%9D%E7%9A%84%E7%81%AF%E6%B3%A1%E7%94%A8%E8%BE%83%E9%95%BF%E5%AF%BC%E7%BA%BF%E6%8E%A5%E5%9C%A8220V%E7%9A%84%E7%94%B5%E6%BA%90%E4%B8%8A%2CP%27%3D90.25W%2C%E6%B1%82%E5%AF%BC%E7%BA%BF%E7%9A%84%E7%94%B5%E5%8A%9F%E7%8E%87)
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