How does the image distance (d) of a convex lens compare with the image distance of a concave lens? A. Both are positive for a virtual image
B. The image distance of the convex lens is positive, and that of the concave lens is negative.
C. The image distance of the convex lens is negative, and that of the concave lens is positive
D. Both are negative for a virtual image.

Place several e-field sensors at a few points on different equipotential lines, and look at the relationship between the electric field and the equipotential lines. which statement is true? 1-at any point, the electric field is perpendicular to the equipotential line at that point, and it is directed toward lines of higher voltages. 2-at any point, the electric field is perpendicular to the equipotential line at that point, and it is directed toward lines of lower voltages. 3-at any point, the electric field is parallel to the equipotential line at that point.