4. An electric field E = 105 & N/C causes a 5.0 g point charge to hang at a 20% angle as shown in the figure. a. Draw a free-body diagram for the hanging charge. 209 b. Write down the sum of the forces in the 9 direction and solve for the magnitude of the 4 5.0 g tension force. c. Write down the sum of the forces in the & direction and solve for the charge of the hanging point charge.5. A collection of infinite charged plates are arranged so that they are parallel, one after the other. First, a plate of surface charge density n = -2 C/m is placed. Then a second plate with surface charge density 12 = +3 C/m' is placed separated from the first by d12 = 3 m. A third plate with surface charge density 73 = -1 C/m2 is placed separated from the second by d23 = 2 m. a. Determine the strength of the electric field in each region delineated by the charged plates. Write your answer in terms of Eg. 71 =-1 12 =+3 m = -2 (m) d12 = 3 |d23 = 2 b. Plot the voltage as a function of x for this configuration of plates. c. Draw in appropriate equipotential lines which follow the rules for equipotential lines. (This would be done as an alternative to plotting the V(x) curve.)