AP® Physics C: E & M

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Comparing Electric Field of Two Spheres

APPHEM-EKLORP

Two spheres are isolated from each other. They each have an identical net positive charge and the same radius. One sphere is solid and insulating while the other is a hollow conducting sphere whose charge is uniformly distributed.

Compare the electric field from the spheres at a distance $x$ from the center of the spheres? Assume $x$ is greater than the radius of the spheres.

A

The conducting hollow sphere has a greater E-field than the solid insulating sphere, which has a smaller E-field.

B

The insulating solid sphere has a greater E field than the hollow conducting sphere, which has a smaller E-field.

C

Both spheres have the same E field.

D

Neither sphere would cause there to be an Electric field.

E

Only the conducting sphere would cause an electric field.