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### 68 Matching questions

1. uniform
2. Capacitance
3. equation for potential difference
4. ε
5. slowly
6. increase; decrease
7. Capacitor
8. J
9. positive----negative
10. dielectric
11. material
12. Ω
13. mechanical energy
14. ohmic materials
15. Positive charge movement
16. V
17. Current
18. Direct Current (DC) -
19. Alternating Current (AC) -
20. potential difference
21. kilowatt-hours.
22. Electron volt
23. R
24. Electric potential
25. charge carrier
26. greater resistance
27. constant
28. high---low
29. connected to a material that conducts
30. work
31. A
32. Parallel Circuit
33. E
34. less resistance
35. Saltwater and perspiration
36. d
37. Potentiometer -
38. point charges
39. Potential difference
40. Luigi Galvani
41. I
42. volts
43. higher resistance
44. PE
45. Ohms law
46. Unit = ampere (A or amps), one coulomb per second
47. energized or charged
48. volt (V)
49. Resistors
50. W/s, not kWh
51. electric potential energy
52. no friction or resistance
53. perpendicular
54. Drift velocity =
55. resistance
56. work done
57. Electrons
58. Electric Power -
59. Unit: Watt (W), one joule per second
60. electromotive force
61. Unit = farad (F), which is one coulomb/volt
62. Electric Current
63. Unit: ohm (Ω)
64. Battery
65. transfer of energy
66. Series Circuit
67. εo
68. zero
1. a -sum up V
2. b variable for electrical energy
3. c Potential difference maintains ____ in a circuit
4. d -2 or more paths
5. e Capacitors made with a _____ between the plates hold more charge - this book assumes vacuum between plates
6. f The negative sign means that the PE will ____ when the charge is negative and ______ when the charge is positive
7. g Electric potential energy is a form of
8. h control the amount of current in a conductor
9. i When discharged, the charges move between the plates until the potential difference is
10. j is the rate of charge transfer
11. k Mechanical energy is conserved as long as there is
12. l is the change in electric potential
13. m When the plates are charged, the capacitor is said to be
14. n unit for EMF
15. o terminals causing potential difference are constantly changing sign, causes charges to just vibrate back and forth rather than flow
16. p When a charge is moved in a uniform electric field, the change in location relates to a change in
17. q discovered that animals conduct electricity - frog legs twitched when conducting electrical experiments near the frog
18. r Whenever a charge is moved by another charge's electric field force,____ is done
19. s is the potential energy associated with a charge in an electric field
20. t Longer material =
21. u A charged capacitor stores
22. v 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
23. w Conventional current =
24. x no change in PE, no
25. y is the permittivity of the material,
26. z Unit for potential difference is the
27. aa a unit of energy, energy 1 electron gains when moved through a potential difference of 1V.
28. ab variable for volt
29. ac The plates become charged by connecting them to a source of
30. ad rate of energy conversion
31. ae Changing the____ between the plates of a capacitor will change how much charge it can hold
32. af variable for joule
33. ag SI unit for electrical energy is
34. ah unit for capacitance
35. ai Greater area =
36. aj variable for ampere
37. ak Opposition of the motion of charge through a conductor
38. al device used to store electric potential energy
39. am Higher temperature =
40. an Negative charges inside the battery move from the ___ terminal to the ____
41. ao in the conductor move along a zig-zag due to their vibrations - causes collisions and energy transfer
42. ap is the permittivity in a vacuum, which is 8.85x10-12 C2/(Nm2)
43. aq No work is done when a charge is moved _____ to an electric field, and the PEelectric remains constant
44. ar Work done to move the charge is a measure of the
45. as Electrons move ____ through a conductor in the opposite direction from the electric field - however E reaches the electrons at nearly c
46. at Once a capacitor is charged it will remain so until
47. au point charges are not____ because their field weakens at a distance
48. av Free electrons in a conductor move from areas of ___ electric potential to areas of ___ electric potential
49. aw lower the body's resistance
50. ax unit for electric power
51. ay variable for ohm
52. az V = IR
53. ba variable for current
54. bb Movement of electric charge
55. bc EMF
56. bd unit for resistance
57. be Ohm's law only applies to materials that have constant resistance - called
58. bf variable for resistance
59. bg is the displacement from reference point
60. bh Power companies measure energy usage in
61. bi Current motion is actually made up of positive, negative or movement of both - called
62. bj unit for current
63. bk is the ratio of the charge to the potential difference of the plates
64. bl no PE for
65. bm a type of resistor that allows the user to change the potential difference across a conductor - used on volume control knobs, dimmer light switch, video game controllers
66. bn net velocity of the charge carriers, very small (~25mm/s)
67. bo ∆V = ∆PEelectric/q
68. bp energy storage unit that maintains a constant potential difference between two locations called terminals