AP PHysics C E and M

Question

A hollow metal sphere is charged to a potential of 40 V. The potential at its center is ________.

Group of answer choices

0 V

80 V

Depends on the radius of the sphere

-49 V

40 V

-80 V

Answer 1

Ans. 40 V at the center of the sphere. There is no electric field inside a hollow metal sphere. This means the potential inside is constant everywhere and at the center. It is equal to the potential at the surface.