問題詳情

38. A solid insulating sphere of radius R contains positive charge that is distributed with a volumecharge density that does not depend on angle but does increase with distance from the sphere center.Which of the graphs below might give the magnitude E of the electric field as a function of thedistance r from the center of the sphere?
(A)


(B)


(C)


(D)


(E)

參考答案

答案：D
難度：計算中-1
書單：沒有書單，新增