1a. Two conducting spheres, X and Y are initially uncharged. They are sitting on insulating stands and are not touching each other. A positively charged acrylic rod (insulator) is brought close to but does not touch sphere X. What are the charges on sphere X and Y? Choose from: positive (+), negative (-), neutral uncharged (NU), neutral polarized (NP). (3 points) x Y Sphere X: Sphere Y: Justify your answer: 1b. Sphere Y is brought to sphere X and is allowed to contact sphere X. What are the charges on sphere X and Y? Choose from: positive (+), negative (-), neutral uncharged (NU), neutral polarized (NP). (3 points) ++++++++ Sphere X: Y Sphere Y: Justify your answer: 1c. If 3.2 C charge is transferred, how many electrons have moved? (1 point) 2. Charge Q1=-16 C is located at +4 m on the y axis and charge Q2 = +9 C is located at +6 m on the x axis as shown in the graph. 10 a. On the graph, draw the electric field line at the origin from Q1; label it E1. Then draw the electric field line at the origin from Q2; label it E2. Finally, draw and label Exotal (3 points) b. Calculate the total electric field, magnitude and direction, at the origin. (3 points) -10-8-6-4-2 8 6 401 2 2 4 6 -2 -4 -6 -8 -10 c. Calculate the magnitude of the electric force between Q1 and Q2. (2 points) P 8 10