Determine the quantity of charge on the following questions. use 1.60 x 10" c for the charge of an electron. 3. plastic tube which has been rubbed with animal fur and gained 3.8x10 electrons. a. a (3 marks] b. a vinyl balloon which has been rubbed with animal fur and gained 1.7x102 electrons. an acetate strip which has been rubbed with wool and lost 7.3x1 0 electrons 4. a 3.6 uc charge is moved from a position where its electric potential energy is 7.2 mj to a position where its potential energy is 1.8 mj. what is the change in potential from the initial position to the final position? a. 1500 v b. 2000 v c. -2000 v d. 3500 v e. -1500 v 5. a hollow conducting sphere of radius 12 cm had a charge of 18 uc placed on it. what is the potential 20 cm from the center of the sphere? α.0 v b. 15 v