In defining an electric field, a test charge is used. Is the test charge positively or negatively charged? Which describes the direction of the electric field vector? Negatively charged. The field vector is in the same direction as the force on the test charge. Negatively charged. The field is in the opposite direction from the force on the test charge. Positively charged. The field vector is in the same direction as the force on the test charge. Positively charged. The field is in the opposite direction from the force on the test charge.
