[問題] 電池串聯的問題
我有一個很笨的問題
觀念不清楚
請各位物理的大大解答一下
感激不盡!!
電池串聯就是把電壓相加大家都知道
電池的內部一定是正負之間有絕緣間隔
不讓負極的電子流到正極去
當外部正、負極接上導線
負極的電子流才會流向正極
假設現在兩顆電池串聯
(外部未接導線)
第二顆的正極接在第一顆的負極
這時不就相當於接通了?
此時第一顆負極的電子不就會流向第二顆的正極?
而第一顆正極跟第二顆負極因為無法導出或導入而無電流
我這樣的想法錯在哪裡?
還有一個觀念上的問題
兩顆電池一樣結構
壓差是由正負極端各自的電子密度或正離子密度來製造電場
使電子移動於導線中
當兩顆電池串聯
為何把第二顆的正極的電位視為等同第一顆負極的電位?
只因為接在一起就等電位
我還滿無法理解@@
假設等電位 那就代表正負電荷分佈已經平均了不是嗎
這兩個問題的盲點應該是一樣的...
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※ 發信站: 批踢踢實業坊(ptt.cc)
◆ From: 114.25.176.152
※ 編輯: TouchAgain 來自: 114.25.176.152 (09/11 02:26)
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感謝你的解說 讓問題變清楚了
可是我還是覺得問題似乎沒有被回答到
因為你所講的壓差跟電路上的計算觀念
我也會計算...
可是就像你所說 壓差是被建立的
當第二顆正極跟第一顆負極接起來時
難道不會有壓差嗎? 為何視為等電位呢
以電路上觀念同點同電位當然
可是我試圖從電池結構去理解這過程
第二顆電池正極傾向去吸引電子
而第一顆負極傾向排斥電子
這裡應該就有壓差了吧?
怎麼會把他預設為同電位呢?
(就如同你為何可以把他預設成五樓)
這就是我的問題點...
雖然從電路計算我們都算習慣了
但仔細想想 好像又有哪裡不對...
※ 編輯: TouchAgain 來自: 114.25.176.152 (09/11 03:11)
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