問題詳情
如右圖所示，長度 L 之二輕繩吊 A、B 二帶同性電之小球，因其間之庫侖斥力，當其相距 X(X=XA+XB) 時呈平衡，若 XA＞XB，則
(A)B 球重力小於 A 球
(B)二球受電力大小相等
(C)A、B 二繩之張力比為 XA：XB
(D)A、B 二球重量比為 XA：XB
(E) 二球所受電力與 X2成反比。
(A)B 球重力小於 A 球
(B)二球受電力大小相等
(C)A、B 二繩之張力比為 XA：XB
(D)A、B 二球重量比為 XA：XB
(E) 二球所受電力與 X2成反比。
參考答案
答案：B,E
難度：適中0.5
統計：A(0),B(0),C(0),D(0),E(0)
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