SAT Subject Physics Practice Question 260: Answer and Explanation

Next steps

Question: 260

31. An ellipsoid-shaped conductor is negatively charged. Which one of the following diagrams best illustrates the charge distribution and electric field lines?

A.
B.
C.
D.
E.

Correct Answer: A

Explanation:

Electric field lines are always perpendicular to the surface of a conductor, eliminating B and E. Excess charge on a conductor always resides on the surface (eliminating D), and there is a greater density of charge at points where the radius of curvature is smaller, which eliminates C.

Previous       Next