天气预报15天查询> 其他> 灯泡通电后为什么会发亮

灯泡通电后为什么会发亮

更新时间: 2020-07-13 00:00:00     

灯泡里面的灯丝是钨丝,其主要成分是钨。当钨丝通电时,由于钨丝的电阻式电能转化成内能,将钨丝加热,所以温度升高。一般金属加热到一定程度后就会发光,这个现象称为白炽状态,通电时灯丝温度达到白炽状态,灯泡就会发亮。

关键词: 灯泡 通电 为什么 发亮

如有意见、反馈、侵权或投诉等情况,请联系:

电话:
邮箱:

我们将会在48小时内给与处理!

版权所有 Copyright ? 2009-2020 tianqiyubao3.com

页面:/news/view-1322394/ | 耗时:0.7265 s | 内存:1.89 MB | 查询:4 | 缓存读取:4 写入:0 | 加载文件:23
select * from tbl_Articles WHERE ArticleID=1322394 LIMIT 0,1
select * from tbl_Articles_data WHERE ArticleID=1322394 LIMIT 0,1
select * from tbl_Articles_sphinx where id=1322394 LIMIT 0,1
SELECT ArticleID,Title FROM tbl_Articles WHERE ArticleID IN(1072681,1100931,127908,1100527,219315,1108578,335085,1097797,553884,1117047,216526,398186,3256590,1968327,1110708,1092278,349960,1062618,1096737,1097583,3114482,1090034,1074300,411442,1085764,1787105,326556,203857,231670,176746) ORDER BY field (ArticleID,1072681,1100931,127908,1100527,219315,1108578,335085,1097797,553884,1117047,216526,398186,3256590,1968327,1110708,1092278,349960,1062618,1096737,1097583,3114482,1090034,1074300,411442,1085764,1787105,326556,203857,231670,176746)