求解一道初三电学物理题如图中,电源电压保持不变,灯L1和L2的阻值不随温度变化.当开关s闭合时通过灯L1的电流为3A,当开关S断开时,灯L2消耗的电功率为10W,开关闭合与断开时灯L1上消耗的电功
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![求解一道初三电学物理题如图中,电源电压保持不变,灯L1和L2的阻值不随温度变化.当开关s闭合时通过灯L1的电流为3A,当开关S断开时,灯L2消耗的电功率为10W,开关闭合与断开时灯L1上消耗的电功](/uploads/image/z/8284803-51-3.jpg?t=%E6%B1%82%E8%A7%A3%E4%B8%80%E9%81%93%E5%88%9D%E4%B8%89%E7%94%B5%E5%AD%A6%E7%89%A9%E7%90%86%E9%A2%98%E5%A6%82%E5%9B%BE%E4%B8%AD%2C%E7%94%B5%E6%BA%90%E7%94%B5%E5%8E%8B%E4%BF%9D%E6%8C%81%E4%B8%8D%E5%8F%98%2C%E7%81%AFL1%E5%92%8CL2%E7%9A%84%E9%98%BB%E5%80%BC%E4%B8%8D%E9%9A%8F%E6%B8%A9%E5%BA%A6%E5%8F%98%E5%8C%96.%E5%BD%93%E5%BC%80%E5%85%B3s%E9%97%AD%E5%90%88%E6%97%B6%E9%80%9A%E8%BF%87%E7%81%AFL1%E7%9A%84%E7%94%B5%E6%B5%81%E4%B8%BA3A%2C%E5%BD%93%E5%BC%80%E5%85%B3S%E6%96%AD%E5%BC%80%E6%97%B6%2C%E7%81%AFL2%E6%B6%88%E8%80%97%E7%9A%84%E7%94%B5%E5%8A%9F%E7%8E%87%E4%B8%BA10W%2C%E5%BC%80%E5%85%B3%E9%97%AD%E5%90%88%E4%B8%8E%E6%96%AD%E5%BC%80%E6%97%B6%E7%81%AFL1%E4%B8%8A%E6%B6%88%E8%80%97%E7%9A%84%E7%94%B5%E5%8A%9F)
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