(2) Equal Potential Contour Map Another important concept is equal potential contour map. Like topographic map, every point on a curve has the same height, and the curves are separated by equal drop or gain in height. One expects a steeper change in heights in an area where the curves are closely packed than another area where the curves are separated by larger spaces. At any point, the net force acting on an object will point "downhill" in the direction perpendicular to the equal potential curve. The steeper the hill, the bigger the force. Similarly, an equal potential contour map can be created around charges and has similar meaning. The closer the curves are, the stronger the electric field. Electric field points in the direction perpendicular to the equal potential line towards the lower potential. For the electric dipole, rank the strength of the field at points A, B, C and D (the strongest being the first.) Draw the directions of the field at these points on the diagram. For the quadrupole charge distribution, rank the strength of the field at the marked points A, B, and C (the strongest being the first.) Draw the directions of the field at