?

AP® Physics 1 & 2

Free Version

Upgrade subject to access all content

Moderate

Rod Touches Metal Sphere

APPH12-FLKC4W

A plastic rod has a uniform negative charge distribution, as shown in the diagram.

What happens to the charge on the rod when one part of the plastic rod touches a neutral metal sphere set on an insulating stand?

A

All the negative charge on the rod is transferred into the metal sphere, leaving the plastic rod neutral.

B

Only the negative charges that touch the metal sphere are transferred onto the sphere. The plastic rod still has some negative charge on it.

C

The rod gains more excess negative charges by taking them from the metal sphere and increasing its negative charge.

D

There is no transfer of charge when the plastic rod touches the metal sphere. The plastic rod does not change its value of charge.