問題詳情
12. A non-conducting sphere of radius R has a total charge Q spread uniformly throughout its volume. What is the potential energy U of the sphere?k = Coulomb-law constant)
(A) kQ2/R；
(B)kQ2/2R；
(C) 3kQ2/2R；
(D) 3kQ2/4R；
(E) 3kQ2/5R.
參考答案
答案：E
難度：計算中-1
書單：沒有書單，新增