1. Use coulombs Law and the slope of the trendline from the F vs. 1/r 2 graph to determine the experimental value of the electric constant to Do not calculate uncertainties for this 3. Compare your experimental value of the electric constant so with the value of the electric constant so . Then find the percent error. Our set value of charge A was to 7 x 10-4 C and charge B to -7 x 10-4 C F 5000.000 4000.000 3000.000 2000.000 1000.000 0.000 MODO 0.200 Force vs. 1/r^2 =4410*x + 4.19E-04 R = 1 0.400 1/r^2 (m) 0.600 0.800 1.000