3. Consider a circular arc that has radius 0.5 m and subtends 0.9 radians in total.Putting 0 = 0 in the center of the arc, the arc has a non-constant

charge per angle given by the formula: Note that the nano will cancel the 109 in k = 9 x 109 N m2 / C2. Calculate the magnitude of the electric field at the center of the arc, in N/C. Your answer should be a positive number. By symmetry, the electric field will point downward, as seen in the diagram below.