An electric field has a. direction. b. magnitude. c. Both A and B

1. An electric field has a. direction. b. magnitude. c. Both A and B

2. An electric field has a. direction. b. magnitude. c. Both A and B

3. Suppose a hollow metal sphere has a large negative charge on it. The electric field strength inside the sphere is a. large and positive. b. zero. c. weak and negative. d. weak and positive. e. large and negative.

4. Suppose a hollow metal sphere has a large negative charge on it. The electric field strength inside the sphere is a. large and positive. b. zero. c. weak and negative. d. weak and positive. e. large and negative.

5. Electrical forces between charges are strongest when the charges are a. far apart. b. close together. c. The electrical force is constant everywhere.

6. Electrical forces between charges are strongest when the charges are a. far apart. b. close together. c. The electrical force is constant everywhere.

7. A difference between electrical forces and gravitational forces is that electrical forces include a. infinite range. b. repulsive interactions. c. the inverse square law. d. separation distance. e. none of the above

8. A difference between electrical forces and gravitational forces is that electrical forces include a. infinite range. b. repulsive interactions. c. the inverse square law. d. separation distance. e. none of the above

9. Two charged particles held close to each other are released. As they move, the force on each particle increases. Therefore, the particles have a. opposite signs. b. the same sign. c. charges that cannot be determined

10. Two charged particles held close to each other are released. As they move, the force on each particle increases. Therefore, the particles have a. opposite signs. b. the same sign. c. charges that cannot be determined

11. A positive charge and a negative charge held near each other are released. As they move, the force on each particle a. increases. b. stays the same. c. decreases.

12. A positive charge and a negative charge held near each other are released. As they move, the force on each particle a. increases. b. stays the same. c. decreases.

13. The SI unit of charge is the a. ohm. b. joule. c. coulomb. d. ampere. e. newton.

14. The SI unit of charge is the a. ohm. b. joule. c. coulomb. d. ampere. e. newton.

15. In a good insulator, electrons are usually a. not moving at all. b. free to move around after an impurity has been added. c. free to move around. d. tightly bound in place. e. semi-free to move around.

16. In a good insulator, electrons are usually a. not moving at all. b. free to move around after an impurity has been added. c. free to move around. d. tightly bound in place. e. semi-free to move around.

17. Charge carriers in a metal are electrons rather than protons, because electrons are a. relatively far from a nucleus. b. loosely bound. c. lighter. d. all of the above e. none of the above

18. Charge carriers in a metal are electrons rather than protons, because electrons are a. relatively far from a nucleus. b. loosely bound. c. lighter. d. all of the above e. none of the above

19. To be safe in the unlikely case of a lightning strike, it is best to be inside a building framed with a. steel. b. wood. c. either A or B.

20. To be safe in the unlikely case of a lightning strike, it is best to be inside a building framed with a. steel. b. wood. c. either A or B.

21. Much electronic equipment contains transistors and diodes that are made from semiconductors. Semiconductors a. can be very good insulators. b. can conduct electricity. c. contain helpful impurities. d. all of the above e. none of the above

22. Much electronic equipment contains transistors and diodes that are made from semiconductors. Semiconductors a. can be very good insulators. b. can conduct electricity. c. contain helpful impurities. d. all of the above e. none of the above

23. If you comb your hair and the comb becomes positively charged, your hair becomes a. uncharged. b. positively charged. c. negatively charged.

24. If you comb your hair and the comb becomes positively charged, your hair becomes a. uncharged. b. positively charged. c. negatively charged.

25. Objects can be charged by a. induction. b. friction. c. touching. d. all of the above e. none of the above

26. Objects can be charged by a. induction. b. friction. c. touching. d. all of the above e. none of the above

27. Lightning bolts occur between a. clouds and the ground. b. clouds. c. both A and B.

28. Lightning bolts occur between a. clouds and the ground. b. clouds. c. both A and B.

29. When a charged cloud passes overhead, the ground below is charged by a. induction. b. polarization. c. deduction. d. electrification.

30. When a charged cloud passes overhead, the ground below is charged by a. induction. b. polarization. c. deduction. d. electrification.

31. A rubbed balloon will stick to a wooden wall, which demonstrates charge a. transfer. b. potential. c. conservation. d. polarization.

32. A rubbed balloon will stick to a wooden wall, which demonstrates charge a. transfer. b. potential. c. conservation. d. polarization.

33. Electrical polarization occurs when a. an electron is at a different location than a proton. b. charge distribution in a neutral molecule separates. c. the electron and the proton are on different sides of an atom. d. an atom vibrates in a single direction. e. none of the above

34. Electrical polarization occurs when a. an electron is at a different location than a proton. b. charge distribution in a neutral molecule separates. c. the electron and the proton are on different sides of an atom. d. an atom vibrates in a single direction. e. none of the above

35. The reason a charged balloon will stick to a wall is that a. induced opposite charges in the wall are closer than other wall charges. b. the rubber of the balloon simply sticks to walls. c. electrons transfer back and forth between the wall and the balloon. d. the charge is slightly sticky and acts like glue. e. none of the above

36. The reason a charged balloon will stick to a wall is that a. induced opposite charges in the wall are closer than other wall charges. b. the rubber of the balloon simply sticks to walls. c. electrons transfer back and forth between the wall and the balloon. d. the charge is slightly sticky and acts like glue. e. none of the above

37. The charge of an electron is a. positive. b. negative. c. Electrons have no charge.

38. The charge of an electron is a. positive. b. negative. c. Electrons have no charge.

39. Atomic nuclei of almost all elements consist of a. only neutrons. b. protons and electrons. c. neutrons and electrons. d. only protons. e. protons and neutrons.

40. Atomic nuclei of almost all elements consist of a. only neutrons. b. protons and electrons. c. neutrons and electrons. d. only protons. e. protons and neutrons.

41. Two like charges a. neutralize each other. b. repel each other. c. must be neutrons. d. attract each other. e. have no effect on each other.

42. Two like charges a. neutralize each other. b. repel each other. c. must be neutrons. d. attract each other. e. have no effect on each other.

43. Protons and electrons a. attract each other. b. repel each other. c. do not interact.

44. Protons and electrons a. attract each other. b. repel each other. c. do not interact.

45. The net charge of a nonionized atom a. depends only on the number of electrons it has. b. is zero. c. usually cannot be determined. d. depends only on the number of protons it has.

46. The net charge of a nonionized atom a. depends only on the number of electrons it has. b. is zero. c. usually cannot be determined. d. depends only on the number of protons it has.

47. A positive ion has a. more electrons than protons. b. more protons than electrons. c. a +1 charge always. d. one proton.

48. A positive ion has a. more electrons than protons. b. more protons than electrons. c. a +1 charge always. d. one proton.

49. Conservation of charge means that a. the total amount of charge in the universe is constant. b. no experimenter has ever seen a single charge destroyed by itself. c. electrons by themselves can be neither created nor destroyed. d. charge can be neither created nor destroyed. e. all of the above

50. Conservation of charge means that a. the total amount of charge in the universe is constant. b. no experimenter has ever seen a single charge destroyed by itself. c. electrons by themselves can be neither created nor destroyed. d. charge can be neither created nor destroyed. e. all of the above