我唔識phy pastpaper 1989 第33條呀..
希望大家解答果陣專有名詞用番英文,,其他係中文我都唔介意,thx
PHY pastpaper
2008-03-11 1:39 am
回答 (2)
2008-03-11 11:00 pm
✔ 最佳答案
係咪C 9:4?如果冇錯的話,應該係咁計:
1.First,find the equivalent resistance when K is opened
2.find the current(I) passing through resistor A
3.find the equivalent resistance when K is closed
4.find the current(I') passing through resistor A
5.P1:P2=I^2:I'^2
p.s.電池既e.m.f.係不變
2008-03-11 4:33 am
有無題目啊-.-
咁多年前的卷唔係好多人有
咁多年前的卷唔係好多人有
收錄日期: 2021-04-13 15:15:54
原文連結 [永久失效]:
https://hk.answers.yahoo.com/question/index?qid=20080310000051KK01676