Question 3: A solid sphere of radius b has a positive uniform charge density. Compare the electric flux through the surface of that sphere the flux through the surface of a sphere of radius a, where b = 2 a. A) Db = Pal 4. B) Db = Pa. C) Pb = 2Pa. D) Db = 4Pa. E) Pb = 8Pa.Question 4: The two long wires in figure have a linear charge density of +/- 2. The distance between them is ro. What is the electric field at point P that is a distance ro below the lower wire? Use E of an infinite wire, E = r . 2TEor A) E = , along -y. 2TEoro B) E = along -y. 3TEoro P. C) E = , along ty. 4TEoro 37 D) E = along ty. ATEoroQuestion 2: Which Gaussian surfaces have an electric flux of -2q/co? A) S1 B) S2 C) $3 52 D) S4 139 - 29 E) S2 and S4 F) S2 and S1