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第二十章 電流磁效應第 59 頁 第四題 的A選項
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Shou Lun Chang
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Apr 24, 2015, 11:44:46 AM
4/24/15
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電場與電動勢的關係
可以由P10推倒得出
ε=E L
但還是不知道怎麼算出兩者之比?
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