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### 79 True/False questions

1. Alternating Current (AC) -terminals causing potential difference are constantly changing sign, causes charges to just vibrate back and forth rather than flow

2. Capacitoris the ratio of the charge to the potential difference of the plates

3. increase; decreaseThe negative sign means that the PE will ____ when the charge is negative and ______ when the charge is positive

4. voltsUnit for potential difference is the

5. Capacitanceis the ratio of the charge to the potential difference of the plates

6. point chargesno change in PE, no

7. electric potential energyis the potential energy associated with a charge in an electric field

8. Drift velocity =-sum up V

9. Series Circuit-constant V

10. electric potential energyis the potential energy associated with a charge in an electric field

11. Unit: ohm (Ω)unit for resistance

12. Parallel CircuitReq=(1/Ra +1/Rb...)^-1

13. materialChanging the____ between the plates of a capacitor will change how much charge it can hold

14. Electric CurrentMovement of electric charge

15. Positive charge movementno PE for

16. zeroWhenever a charge is moved by another charge's electric field force,____ is done

17. charge carrier-one path

18. perpendicularNo work is done when a charge is moved _____ to an electric field, and the PEelectric remains constant

19. Ωvariable for ohm

20. transfer of energyWork done to move the charge is a measure of the

21. εois the permittivity in a vacuum, which is 8.85x10-12 C2/(Nm2)

22. Currentis the rate of charge transfer

23. Ohms lawResistance is____ over a range of potential differences

24. uniformpoint charges are not____ because their field weakens at a distance

25. εvariable for current

26. constantis the rate of charge transfer

27. high---lowFree electrons in a conductor move from areas of ___ electric potential to areas of ___ electric potential

28. Saltwater and perspirationLonger material =

29. greater resistanceHigher temperature =

30. Electronsa unit of energy, energy 1 electron gains when moved through a potential difference of 1V.

31. higher resistanceOpposition of the motion of charge through a conductor

32. Luigi Galvanidiscovered that animals conduct electricity - frog legs twitched when conducting electrical experiments near the frog

33. Parallel Circuit-2 or more paths

34. Rvariable for resistance

35. Electric Power -is the potential energy associated with a charge in an electric field

36. Unit: Watt (W), one joule per secondMechanical energy is conserved as long as there is

37. Vvariable for potential difference

38. Electron voltin the conductor move along a zig-zag due to their vibrations - causes collisions and energy transfer

39. dielectricCapacitors made with a _____ between the plates hold more charge - this book assumes vacuum between plates

40. energized or chargedWhen the plates are charged, the capacitor is said to be

41. Unit = farad (F), which is one coulomb/voltunit for capacitance

42. no friction or resistanceMechanical energy is conserved as long as there is

43. Potentiometer -control the amount of current in a conductor

44. Direct Current (DC) -electrons move in one direction, from low electric potential to high electric potential (remember conventional current is flow of positive charge) - conventional current moves from positive terminal to negative terminal

45. Jvariable for resistance

46. Parallel Circuit-Req= Ra+Rb+Rc....

47. mechanical energyWork done to move the charge is a measure of the

48. work doneno change in PE, no

49. Series Circuit-sum up I

50. constantResistance is____ over a range of potential differences

51. electromotive forceEMF

52. Series Circuit-Req> any R of a device

53. Series Circuit-one path

54. PEvariable for electrical energy

55. Electric potentialis the potential energy associated with a charge in an electric field

56. Avariable for ampere

57. kilowatt-hours.in the conductor move along a zig-zag due to their vibrations - causes collisions and energy transfer

58. Series Circuit-constant V

59. dvariable for electrical energy

60. Unit = ampere (A or amps), one coulomb per secondunit for current

61. equation for potential difference∆V = ∆PEelectric/q

62. Potential difference∆V = ∆PEelectric/q

63. potential difference∆V = ∆PEelectric/q

64. Batteryis the rate of charge transfer

65. Ivariable for electrical energy

66. Parallel Circuit-constant V

67. Resistorscontrol the amount of current in a conductor

68. Parallel Circuit-Req> any R of a device

69. W/s, not kWhWhenever a charge is moved by another charge's electric field force,____ is done

70. less resistanceGreater area =

71. resistanceOpposition of the motion of charge through a conductor

72. Vvariable for resistance

73. Evariable for current

74. slowlyElectrons move ____ through a conductor in the opposite direction from the electric field - however E reaches the electrons at nearly c

75. ohmic materialsOhm's law only applies to materials that have constant resistance - called

76. workWhen discharged, the charges move between the plates until the potential difference is

77. positive----negativeNegative charges inside the battery move from the ___ terminal to the ____

78. volt (V)unit for EMF

79. connected to a material that conductsOhm's law only applies to materials that have constant resistance - called