Clear the screen and place single positive charge on the map. Mark a few evenly spaced equipotentials (at least 6 of them). The precise values are not that important, but you need to record the values of the electric potential for each one. The electric potential should scale with the inverse of the distance for a point charge. Use the tape measure tool to measure the distance from the charge to each of the equipotentials. We can manipulate the equation V = 2 and take the natural log of both sides of the equation. (*See comment below about units.) kQ In V = In In V = In kQ - In r If you construct a graph of In V versus Inr, this has the equation of a line ? = m? + b , where ? = In V , ? = Inr , b = In kQ , and m = -1 . Therefore, the slope for this graph should be -1. Make this graph and assess whether your data is consistent with this prediction. The electric field strength should scale with the inverse of the distance squared for a point charge. Use the sensors and the tape measure tool to get a data set similar to the one you made for electric potential in the first half of this activity. We can manipulate the equation E = *2 and take the natural log of both sides of the equation. In E = In KQ In E = In kQ - 2 Inr If you construct a graph of In V versus Inr, this has the equation of a line ? = m? + b , where ? = In E , ? = Inr , b = In kQ , and m = -2 . Therefore, the slope for this graph should be -2. Make this graph and assess whether your data is consistent with this prediction