Science vocab chapter 11

  1. Electric circuit
  2. A closed path along which electrons that are powered can flow
    E.g. parallel, series
  3. Voltaic cell
  4. A source of energy that generates electric current by chemical reactions involving two different metal compounds separated by a conducting solution
    E.g. a circuit involving two electrodes in vinegar
  5. Battery
  6. A connection of two or more cells
    E.g. AA, AAA, C, D, 9V
  7. Electrode
  8. One of two metal terminals in a cell or battery
    E.g. an aluminum strip in a voltaic cell
  9. Electrolyte
  10. A solution or paste that conducts charge
    E.g. battery acid
  11. Dry cell
  12. A cell that contains an electrolyte made of paste
    E.g. a  AA battery contains pasty acid
  13. Wet cell
  14. A cell that contains a liquid electrolyte
    E.g. a car battery
  15. Primary cell
  16. A cell that can be used only once
    E.g. a “regular” AA battery
  17. Secondary cell
  18. A cell that can be recharged
    E.g. a rechargeable battery
  19. Fuel cell
  20. A cell that generates electricity through the chemical reactions of fuel that is stored outside the cell
    E.g. windmills, hydro plants & solar panels  
  21. Solar cell
  22. A cell that converts sunlight into electrical energy
    E.g. solar panels
  23. Terminal
  24. A position on a cell that must be connected to other components to form a circuit
    E.g. the positive and negatives on a battery
  25. Switch
  26. A control device that can complete or break the circuit to which it is connectedE.g. a light switch on a wall
  27. Open circuit
  28. A circuit that contains a gap or a break
    E.g. an open switch
  29. Electric current
  30. A measure of the number of charged particles that pass by a point in an electric circuit each second
    E.g. measured in amps
  31. Coulomb (C)
  32. The quantity of charge that is equal to the charge of 6.25 x 1018 electrons
    E.g. kind of self-explanatory
  33. Ampere (A)
  34. The unit of electric current, equivalent to one coulomb per second
    E.g. the higher the amperage the more electrons per second
  35. Electrical resistance
  36. The property of a substance that hinders electrical current and converts electrical energy into other forms of energy
    E.g. lamps have resistance
  37. Resistor
  38. A device used in an electric to decrease the current through a component by a specific amount
    E.g. resisting something by 10 ohms
  39. Load
  40. A resistor or any device that transforms electrical energy into heat, motion, sound, or light
    E.g. lamp, iPod, stove, electric car
  41. Potential difference (voltage)
  42. The difference between the electrical potential energy per unit of charge at two points in a circuit
    E.g. measured with a voltmeter, measured in volts
  43. Volt
  44. The unit for potential difference; equivalent to one joule (J) per coulomb (C)
    E.g. a 9V battery
  45. Circuit diagram
  46. A diagram that uses standard symbols to represent the components in an electric circuit and their connections
    • E.g. ___ is used to show cell
    •         --
  47. Series circuit
  48. A circuit in which there is only one path along which electrons can flow
    E.g. a basic light circuit
  49. Parallel circuit
  50. A circuit in which there is more than one path along which electrons can flow
    E.g. many household electrical outlets
  51. Ohm’s law
  52. The ratio of potential difference to current is a constant called resistance
    E.g. R=V/I
  53. Ohm (Ω)
  54. The unit for resistance, equivalent to one volt per ampere (V/A)
    E.g. the more ohms, the more the resistance
  55. Superconductor
  56. A material in which electric charge can flow with no resistance
    E.g. a super cooled metal
  57. Non-ohimic
  58. Not following ohm’s law
    E.g. a diode
  59. Loads in series
  60. The potential difference is shared among the loads, but the current remains the same
    E.g. Vt = V1 + V2
  61. Loads in parallel
  62. The potential difference remains the same, but the current is shared among the paths
    E.g. Vt = V1 = V2
Card Set
Science vocab chapter 11
Science vocab chapter 11