2c Three charges of magnitude 3.0 x 10-4 C each are located at x = 1.0 m, y = 0.0 m, at x = 0.0 m, y = 0.0 m, and at x = -1.0 m, y =0.0 m. The one in the middle is negative, while the other two are positive. What is the magnitude of the net Coulombic force exerted by them on a negative 3.0 x 10-5 C charge located at x = 0.0 m, y = 2.0 m? a. 2.8 N b. 12.0 N c. 8.7N d. 1.0 N e. 0.096 N 3a What is the strength of an electric field that a 0.010 C negative charge experiences 0.90 mm from a 0.20 C positive charge? a. 2.2 x 1015 N/C b. 5.6 x 1016 N/C c. 1.1 x 1015 N/C d. 4.7 x 1016 N/C e. 1.3 x 1016 N/C 4d Two infinite parallel surfaces carry uniform charge densities of 0.35 nC/m and -1.65 nC/m . What is the magnitude of the electric field at a point between the two surfaces? a. 94 N/C b. 56 N/C C. 147 N/C d. 113 N/C e . 73 N/C