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試卷名稱：111年 - 111 國立臺灣大學_轉學生招生考試：普通物理學(A)#125314
年份：111年
科目：研究所、轉學考(插大)◆普通物理學
15. A metal sphere of radius 2R stores an amount of charge Q initially.
It then connects to another metal sphere of radius R by a conducting
wire, which is removed after the charge is redistributed. Suppose the two spheres are far away apart.
The ratio of the electric-field strength just outside the surface of the larger sphere to that of the smaller spheres is
(A) 2:1
(B) 3:2
(C) 1:3
(D) 1:2.
