回復 10# 的帖子
因為anode同cathode 0既接觸面細, 個反應慢而external circuit比d電子transfer得快好多
你就咁放舊電係櫃唔理佢兩三年都會無左唔少電, 視乎個cell 0既 shelf life (個字已經唔記得, 錯左請提我)
[ 本帖最後由 bunbunbunbun 於 29-8-2008 02:46 編輯 ] 原帖由 samsony 於 29-8-2008 02:16 發表 http://www.nakuz.com/bbs/images/common/back.gif
但係你個種more reactive 而lose electrons......不是應該lose electrons去form salt咩.....但nowcell 呢種係lose左係個external circuit 到......點解???@@
你不如由一開頭ionic bond果課睇起...理解左咩叫ion,點解要lose e-果d野先好睇呢課[]
回復 11# 的帖子
如果係你呢個說法咁我應該係明了....thx~回復 12# 的帖子
多謝提點......但我其實明既可能言詞中唔係咁顯示到比你睇....sorry.....thx~ Anode Cathode 痴埋一齊的話,咁同將樽OA倒落樽RA度有乜分別?
你整個cell用黎發電,但係d電係邊度黎?
basic defnintion of chemical cell係乜?
electrolyte 點通電?
electron唔走external circuit唔通曉得瞬間轉移?
知唔知 metal lose 左 electron 去左邊? 點成complete circuit? 明晒先好話明. 爺又一次直斥其非[] 我對phy既問題有少少補充 :)
簡單來說 An electric field is a region where a force acts on a charged body placed in the region.
而the direction of electric field唔一定由+ve charged去-ve charged
正確來說是由高既electric potential去低既electric potential
而The direction of magnetic field at a point is taken as the direction of the force that acts on a north magnetic pole there.
如果有錯請指證 (逃 An electric field is a region where a force acts on a charged body placed in the region.
E-field gives the direction of force acting on a +ve charge.
The direction of magnetic field at a point is taken as the direction of the force that acts on a north magnetic pole there.
Nobody uses force acting on north magnetic pole as definition of magnetic field. 原帖由 【YU】 於 29-8-2008 19:20 發表 http://www4.nakuz.com/bbs/images/common/back.gif
E-field gives the direction of force acting on a +ve charge.
Nobody uses force acting on north magnetic pole as definition of magnetic field.
我諗起kennth wong 1201 佢成日講 "positive charge and negative charge" 佢個音調好正架@@
我覺得e field b field都係一種自己作出黎ge野 叫做 "會影響charge 或者 magnet 的力牆 "會唔會易明d
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