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itoy2008 發表於 2013-2-25 11:58

導電性，傳電速度

那種金屬最快？黃銅？紫銅定有其他？請指教^^

obee 發表於 2013-2-25 12:09

http://www.cleanroom.byu.edu/Resistivities.phtml
In terms of resistance, silver wins copper by 6%.

http://en.wikipedia.org/wiki/Silver
Some manufacturers produce audio connector cables, speaker wires, and power cables using silver conductors, which have a 6% higher conductivity than ordinary copper ones of identical dimensions, but cost very much more. Though debatable, many hi-fi enthusiasts believe silver wires improve sound quality.

ropresident 發表於 2013-2-25 12:10

當然係銀啦{:6_238:}

YYSKY 發表於 2013-2-25 12:16

ropresident 發表於 2013-2-25 12:10 static/image/common/back.gif
當然係銀啦

乜唔係金ma？因為貴退而求其次至用銀，記憶係咁，不過被番晒亞sir啦，當年佢好似係咁講，有錯勿插！

ropresident 發表於 2013-2-25 12:23

YYSKY 發表於 2013-2-25 12:16 static/image/common/back.gif
乜唔係金ma？因為貴退而求其次至用銀，記憶係咁，不過被番晒亞sir啦，當年佢好似係咁講，有錯勿插！ ...

其實金既導電仲差過銅, 只係因為金既抗氧化能力非常好(幾百年都唔會氧化), 所以多數拎黎做防氧化多d, 當然亦有拎黎調聲既用處啦~~~

zoneaudio 發表於 2013-2-25 12:54

應該是一樣只係電阻損耗有差異{:8_399:}

itoy2008 發表於 2013-2-25 13:31

YYSKY 發表於 2013-2-25 12:16 static/image/common/back.gif
乜唔係金ma？因為貴退而求其次至用銀，記憶係咁，不過被番晒亞sir啦，當年佢好似係咁講，有錯勿插！ ...

好似係,所以以前CPU d腳導晒金??{:6_141:}(in my memory)

itoy2008 發表於 2013-2-25 13:32

ropresident 發表於 2013-2-25 12:23 static/image/common/back.gif
其實金既導電仲差過銅, 只係因為金既抗氧化能力非常好(幾百年都唔會氧化), 所以多數拎黎做防氧化多d, 當 ...

原來係咁(我都唔係好知啦...{:6_176:} )

itoy2008 發表於 2013-2-25 13:33

kenneth_obee 發表於 2013-2-25 12:09 static/image/common/back.gif
http://www.cleanroom.byu.edu/Resistivities.phtml
In terms of resistance, silver wins copper by 6%.



Tungsten係咩來?{:6_141:}

obee 發表於 2013-2-25 13:58

itoy2008 發表於 2013-2-25 13:33 static/image/common/back.gif
Tungsten係咩來?

The chemical element of atomic number 74, a hard steel-gray metal of the transition series. It has a very high melting point (3410°C) and is used to make electric light filaments

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