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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