點解燈冇咗電池唔著,但唔係話電線入面有電子,點解電線連接了燈膽,個燈膽又唔著
回答 (2)
2007-01-09 2:02 am
✔ 最佳答案
Although電線入面有，但電子只可以傳導energy，本身是無energy的。而電池有energy，所以電池、電線和燈要互相連接成close circle，才能通電。
參考: I.S. Book(F.2)
2007-01-09 1:52 am
open current or no electricity flow through can't turn up any lights!
收錄日期: 2021-04-12 23:04:13
原文連結 [永久失效]:
https://hk.answers.yahoo.com/question/index?qid=20070108000051KK02744