問題詳情
8. A spherical ball contains a charge +q uniformly distributed over its surface. When its diameter is D, theelectric field at its surface has magnitude E. What will the electric field be if its diameter changes to 2Dwithout changing the charge?
(A)E
(B)2E
(C)4E
(D) E/2
(E) E/4
參考答案
答案：E
難度：計算中-1
書單：沒有書單，新增