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Linear $E$ in Sphere

APPHEM-V9KLUN

The diagram shows a material formed into a sphere of radius R. The diagram shows the magnitude of the electric field E as a function of distance r from the center of the sphere. Which of the following can be concluded from this graph?

The diagram shows a material formed into a sphere of radius R. The diagram shows the magnitude of the electric field E as a function of distance r from the center of the sphere. Which of the following can be concluded from this graph?

A

The sphere is made of metal.

B

The sphere is an insulator with uniform volume charge density.

C

The sphere is an insulator with volume charge density that is increases as r increases.

D

The sphere is an insulator with volume charge density that is decreases as r increases.

E

None of these conclusions is certain based on the graph.