一天,小明发现家里一盏标有“220V 40W”很旧的白炽灯发光较暗,他急忙跑到楼道里观察电能表,并用手表配合测出电功率为1200W.(1)"这不可能是白炽灯的电功率” 小明检查读数和计算均无误,
来源:学生作业帮助网 编辑:作业帮 时间:2024/07/05 22:40:44
![一天,小明发现家里一盏标有“220V 40W”很旧的白炽灯发光较暗,他急忙跑到楼道里观察电能表,并用手表配合测出电功率为1200W.(1)](/uploads/image/z/5031468-36-8.jpg?t=%E4%B8%80%E5%A4%A9%2C%E5%B0%8F%E6%98%8E%E5%8F%91%E7%8E%B0%E5%AE%B6%E9%87%8C%E4%B8%80%E7%9B%8F%E6%A0%87%E6%9C%89%E2%80%9C220V+40W%E2%80%9D%E5%BE%88%E6%97%A7%E7%9A%84%E7%99%BD%E7%82%BD%E7%81%AF%E5%8F%91%E5%85%89%E8%BE%83%E6%9A%97%2C%E4%BB%96%E6%80%A5%E5%BF%99%E8%B7%91%E5%88%B0%E6%A5%BC%E9%81%93%E9%87%8C%E8%A7%82%E5%AF%9F%E7%94%B5%E8%83%BD%E8%A1%A8%2C%E5%B9%B6%E7%94%A8%E6%89%8B%E8%A1%A8%E9%85%8D%E5%90%88%E6%B5%8B%E5%87%BA%E7%94%B5%E5%8A%9F%E7%8E%87%E4%B8%BA1200W.%EF%BC%881%EF%BC%89%22%E8%BF%99%E4%B8%8D%E5%8F%AF%E8%83%BD%E6%98%AF%E7%99%BD%E7%82%BD%E7%81%AF%E7%9A%84%E7%94%B5%E5%8A%9F%E7%8E%87%E2%80%9D+%E5%B0%8F%E6%98%8E%E6%A3%80%E6%9F%A5%E8%AF%BB%E6%95%B0%E5%92%8C%E8%AE%A1%E7%AE%97%E5%9D%87%E6%97%A0%E8%AF%AF%2C)
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