1. Two objects, A and B are rubbed together. If object A 6. If an object has a net negative charge of 4.0 coulombs, acquires an excess of 100 electrons object B must the object possesses have A) 6.3 x 1018 more electrons than protons A) gained 100 electrons B) 2.5 x 1019 more electrons than protons B) gained 100 protons C) 6.3 x 1018 more protons than electrons C) lost 100 electrons D) 2.5 x 1019 more protons than electrons D) lost 100 protons 7. Which fundamental force is primarily responsible for Base your answers to questions 2 and 3 on the attraction between protons and electrons? the diagram below which represents a system consisting of two charged metal spheres with equal A) strong B) weak radii. C) gravitational D) electromagnetic 8. The diagram below shows two metal spheres suspended by strings and separated by a distance of 3.0 meters. The charge on sphere A is +5.0 x 10-4 -12m coulomb and the charge on sphere B is +3.0 x 10-5 coulomb. + 2.0x10'C -8. 0x 10 c 3.0 m 2. If spheres A and B, as represented in the diagram, were touched together and then separated, the net charge on the two spheres would A B A) decrease B) increase Which statement best describes the electrical force C) remain the same between the spheres? 3. If the two spheres were touched together and then separated, the charge on sphere A would be A) It has a magnitude of 15 N and is repulsive. B) It has a magnitude of 45 N and is repulsive. A) -6.0 x 10- C B) 2.0 x 10-C C) It has a magnitude of 15 N and is attractive. )-3.0 x 10-4 C D) -8.0 x 10-4C D) It has a magnitude of 45 N and is attractive. 4. After a neutral object loses 2 electrons, it will have a 9. An electron is located 1.0 meter from a +2.0-coulomb net charge of charge, as shown in the diagram below. A A) -2 elementary charges B) +2 elementary charges C) -3.2 x 10-19 elementary charge +2.0 C D) +3.2 x 10-13 elementary charge D. 5. A particle could have a charge of -1.0 m A) 0.8 x 10-13 C B) 1.2 x 10-19 C C) 3.2 x 10-13 C D) 41 x 10-" C C The electrostatic force acting on the electron is directed toward point A) A B) B C) C D) D