天气预报15天查询> 其他> 灯泡丝断又接上变得更亮为什么

灯泡丝断又接上变得更亮为什么

更新时间: 2020-10-01 00:00:00     

灯丝断掉被搭上以后,灯丝会比原来更粗、更短 ,其电阻变小,电压U不变时,电阻R越小,功率P就越大,灯泡就越亮。

灯泡灯丝断掉又接上电阻变小的原因:

1、长度:相同材料、粗细相同的导体,长度越短,电阻越小。

2、横截面积:相同材料、相同长度的导体,横截面积越大,电阻越小。

关键词: 灯泡 为什么

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-1309417/ | 耗时:0.5113 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=1309417 LIMIT 0,1
select * from tbl_Articles_data WHERE ArticleID=1309417 LIMIT 0,1
select * from tbl_Articles_sphinx where id=1309417 LIMIT 0,1
SELECT ArticleID,Title FROM tbl_Articles WHERE ArticleID IN(1080529,1048280,1102443,1131323,3062353,1955179,2047989,1083087,1372784,2730195,1275356,2467880,1087912,1101641,1120715,1633079,1110546,260847,2014839,1092998,176183,2978667,1599196,2941114,1087825,2984218,245524,1488845,3111065,2490751) ORDER BY field (ArticleID,1080529,1048280,1102443,1131323,3062353,1955179,2047989,1083087,1372784,2730195,1275356,2467880,1087912,1101641,1120715,1633079,1110546,260847,2014839,1092998,176183,2978667,1599196,2941114,1087825,2984218,245524,1488845,3111065,2490751)