A negative test charge experiences a force to the right as a result of an electric field. Which is the best conclusion to draw based on this description?

The electric force is related to the field by F = qE. Because the test charge is negative, its force points opposite the electric field. The force is to the right, so the electric field points to the left; the correct choice is “The electric field points to the left because the force on a negative charge is opposite to the direction of the field.”

AI-written and checked against the verified answer.