8. In which case is electrical potential energy increasing? (1) An electron moving away from a negative plate (2) Two protons moving toward each other. (3) A proton moving parallel to a negative plate. (4) An electron and proton moving closer together Proof: Explain your reasoning. 9. The order of magnitude of the electrical potential generated when 5000 electron-volts of work are done on 10 electrons is (1) 1 (2) 2 (3) 3 (4) 4 Proof: Explain your reasoning / show calculations