問題詳情
7.( ) 有兩個相等的正電荷(以Q表示)其距離為r時，他們之間相互作用力的大小以F表示。假設距離不變，而改變其電性或電量，則下列哪一個靜電力圖是對的？
(A) 
(B) 
(C) 
(D) 
參考答案
無參考答案
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