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Re: [題目] 國三理化問題

[ Physics ]147 留言, 推噓總分: +22

作者: condensed - 發表於 2013/11/24 09:21(12年前)

143^F推profyang:這是有啥好戰的...11/27 12:20

[問題] 沒有電阻的導線

[ Physics ]20 留言, 推噓總分: +4

作者: skylion - 發表於 2013/11/18 12:23(12年前)

10^F→profyang:無法判定11/18 18:07

14^F推profyang:如果放安培計的話應該會接近0沒錯一般安培計內阻再怎樣11/19 16:20

15^F→profyang:小應該也不會小於導線才對11/19 16:20

[問題] 電學

[ Physics ]35 留言, 推噓總分: +7

作者: salvationist - 發表於 2013/11/17 22:11(12年前)

24^F推profyang:導體電荷分布表面絕緣體不一定 end 為啥可以扯這麼多= =11/17 23:08

33^F推profyang:它裡面電荷分配不見得是球對稱金屬裡面如果外面影響夠小11/18 22:37

34^F→profyang:就對稱的分配在表面11/18 22:37

[題目] 自感

[ Physics ]1 留言, 推噓總分: +1

作者: stman - 發表於 2013/11/15 19:51(12年前)

1^F推profyang:N^2...11/15 20:03

[問題] 光速恆定

[ Physics ]28 留言, 推噓總分: +4

作者: Chibakirino - 發表於 2013/11/13 15:49(12年前)

27^F推profyang:簡單來說牛頓坐標:光速會變!! Maxwell eq:光速不變~~11/14 15:41

28^F→profyang:然後愛因斯坦選擇相信Maxwell eq.11/14 15:41

[閒聊] 對於薛丁格的貓的批判

[ Physics ]23 留言, 推噓總分: -2

作者: chronodl - 發表於 2013/11/13 08:46(12年前)

15^F噓profyang:11/13 17:43

[請益] 請教傅立葉轉換相關問題

[ Physics ]7 留言, 推噓總分: +3

作者: baalism2 - 發表於 2013/11/12 23:04(12年前)

7^F推profyang:頻率變負的?11/13 12:39

Re: [題目] 電磁學相關問題

[ Physics ]5 留言, 推噓總分: +3

作者: profyang - 發表於 2013/11/12 22:07(12年前)

2^F→profyang:對11/12 22:10

4^F→profyang:1/4πε 高中不是都先教k再教ε的嗎? @.@11/12 22:31

[題目] 電磁學相關問題

[ Physics ]8 留言, 推噓總分: +4

作者: NCTULaoda - 發表於 2013/11/12 21:23(12年前)

1^F推profyang:可以用球殼定理算V吧?11/12 21:25

2^F推profyang:你怎麼積?外面跟裡面不一樣喔11/12 21:36

3^F推profyang:補充一下你的dv=4πr^2dr的話對於在半徑R地方的電位11/12 21:42

4^F→profyang:r<R時應用球殼定裡裡面的dr球殼對R造成電位是V=k*ρ/Rdv11/12 21:43

5^F→profyang:但是外面的話就是V=k*ρ/r*dv11/12 21:44

6^F推profyang:注意一下r是每個dr球殼的位置 R則是你要算電位的位置11/12 21:46

7^F→profyang:不然你嫌麻煩的話可以直接解laplace eq.11/12 21:48

Fw: [問題] 要如何遮蔽高頻電磁波？

[ Physics ]9 留言, 推噓總分: +3

作者: amidha - 發表於 2013/11/08 22:06(12年前)

1^F推profyang:多高頻? γ射線?XD11/08 22:13

5^F推profyang:那簡單蓋個鐵皮屋把它遮起來!!厚一點然後你家周圍都不11/08 23:33

6^F→profyang:用用電話了~11/08 23:33

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