?

AP® Physics C: E & M

Free Version

Upgrade subject to access all content

Moderate

$E$ Field Moving Away

APPHEM-RGKONB

A solid isolated charged conductor with a radius $r$ produces an electric field of $E$ at a distance $d$, which is larger than $r$. What is the electric field at a distance of $2d$?

A

$ E $

B

$ 2E $

C

$ \dfrac {E}{2} $

D

$ \dfrac {E}{4} $

E

$4E$