問題詳情
3. 如圖，兩固定的平行導線通以等值、同方向的電流，則關於兩導線間磁場強度的變化，下列何者正確？(縱軸：磁場強度B，橫軸：兩導線距離為 d) 
(A) 
(B) 
(C) 
(D) 
參考答案
無參考答案
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