2. Choose a particular amount of positive charge, say +5 nC, measure the electric field at various points using the Sensor (the yellow button), the distance between the point charge and the point you choose (use the measuring tape tool) and record on the following table. Electric Field Strength, E (N/C) Distance, r (m) (1/m') 1 73.8 0.746 1.797 2 34.1 1.123 0.793 3 23.2 1.376 0.528 4 17.5 1.577 0.402 5 12.5 1.882 0.282 6 8.47 2.299 0.189 7 6.0 2.688 0.1383. Plot two graphs, one for E versus / and other for E versus . By analyzing these two graphs, do you believe that the electric field is inversely proportional to the square of the distance (the Coulomb's Law)? 4. Using your second graph, calculate the value for ^. and compare with the theoretical value, k. = 8.988x10" Nm'/C- . Show your detail calculation including the percent error for your experimental value