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AP® Physics C: E & M

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Moderate

Charges of Two Spheres

APPHEM-KD0TOE

Two neutral conducting spheres are next to each other and touching each other. They are also each separated from the table with an insulating stand.

Then, a negatively charged rod is brought near, but not touching, sphere $A$. The two spheres are then separated by touching only their insulating base. Finally, the charged rod is removed.

What are the charges of sphere $A$ and sphere $B$?

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A

Sphere A is positive while sphere B is negative.

B

Sphere A is negative while sphere B is positive.

C

Both spheres are positively charged.

D

Both spheres are negatively charged.

E

Neither​ Sphere is charged.