To calculate the electric field you were asked to measure the potential difference along a line in the area between the "plates" of pattern 1. why would you not be able to a "point charge" pattern? what is different about do this for the electric field in the second case? 4. in the experiment, the "charge" on each electrode was equal. if the charge on one of the electrodes was twice the other, would this have any effect on how the electric field lines are drawn? explain. 5. discuss the relationship(s) between equipotential lines and other types of maps. do electric field lines have any analogous "cousins" on other maps?