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試卷名稱：112年 - 112 學士後醫學系招生考試:物理及化學#114227
年份：112年
科目：學士後西醫物理及化學
49. A solid, insulating sphere of radius a has a uniform charge density throughout its volume and a total charge Q. Concentric with this sphere is an uncharged, conducting, hollow sphere whose inner and outer radii are b and c as shown in the figure. Find the magnitude of the electric field for r ＜ a. 
(A) 
(B) 
(C)
(D) 
(E) E = 0
