Conductors and insulators

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Conductors and insulators

  1. 1. Conductors and insulators
  2. 2. <ul><li>When it comes to the flow of electric current, all materials fall into three categories: </li></ul>
  3. 3. <ul><li>When it comes to the flow of electric current, all materials fall into three categories: </li></ul><ul><li>insulators </li></ul>
  4. 4. <ul><li>When it comes to the flow of electric current, all materials fall into three categories: </li></ul><ul><li>insulators </li></ul><ul><li>conductors </li></ul>
  5. 5. <ul><li>When it comes to the flow of electric current, all materials fall into three categories: </li></ul><ul><li>insulators </li></ul><ul><li>conductors </li></ul><ul><li>resistors </li></ul>
  6. 6. Insulator – Any material that does not allow electric current to pass through it <ul><li>plastic </li></ul><ul><li>rubber </li></ul><ul><li>glass </li></ul><ul><li>like the protective coating on wires </li></ul>
  7. 7. Insulator – Any material that does not allow electric current to pass through it <ul><li>plastic </li></ul><ul><li>cloth </li></ul><ul><li>wood </li></ul><ul><li>like the protective coating on wires </li></ul>
  8. 8. Insulator – Any material that does not allow electric current to pass through it <ul><li>plastic </li></ul><ul><li>rubber </li></ul><ul><li>glass </li></ul><ul><li>cloth </li></ul><ul><li>wood </li></ul><ul><li>like the protective coating on wires </li></ul>
  9. 9. Insulator – Any material that does not allow electric current to pass through it <ul><li>plastic </li></ul><ul><li>rubber </li></ul><ul><li>glass </li></ul><ul><li>cloth </li></ul><ul><li>wood </li></ul><ul><li>like the protective coating on wires </li></ul>
  10. 10. Insulator – Any material that does not allow electric current to pass through it <ul><li>plastic </li></ul><ul><li>rubber </li></ul><ul><li>glass </li></ul><ul><li>cloth </li></ul><ul><li>wood </li></ul><ul><li>like the protective coating on wires </li></ul>
  11. 11. Insulator – Any material that does not allow electric current to pass through it <ul><li>plastic </li></ul><ul><li>rubber </li></ul><ul><li>glass </li></ul><ul><li>cloth </li></ul><ul><li>wood </li></ul><ul><li>like the protective coating on wires </li></ul>
  12. 12. Insulators like plastic and rubber are used as a covering for electric wires. This makes electric wires safer to handle because the insulator protects you from the current.
  13. 13. Conductor – insulator conductor Any material that allows electric current to pass through it
  14. 14. Conductor – <ul><li>copper </li></ul>insulator conductor Any material that allows electric current to pass through it
  15. 15. Conductor – <ul><li>copper </li></ul><ul><li>aluminum </li></ul>insulator conductor Any material that allows electric current to pass through it
  16. 16. Conductor – <ul><li>copper </li></ul><ul><li>aluminum </li></ul><ul><li>steel </li></ul>insulator conductor Any material that allows electric current to pass through it
  17. 17. Conductor – <ul><li>copper </li></ul><ul><li>aluminum </li></ul><ul><li>steel </li></ul><ul><li>any metal </li></ul>insulator conductor Any material that allows electric current to pass through it
  18. 18. Conductive material (metal) is used for wires that will carry electricity. insulator conductor
  19. 19. A material or a device that allows some current to pass but converts some of the current to another form of energy. Resistor Light energy Motion energy Heat energy Sound energy
  20. 20. into light energy Motion energy eat energy Sound energy These appliances have resistors that convert electrical energy into light energy.
  21. 21. Light energy Motion energy Heat energy Sound energy These appliances have resistors that turn electrical energy into motion energy.
  22. 22. Light energy Motion energy Heat energy Sound energy These appliances have resistors that change electrical energy into heat energy.
  23. 23. These appliances have resistors that convert electrical energy into sound energy.
  24. 24. Useful electric current can only move through a path of conductive material.
  25. 25. Useful electric current can only move through a path of conductive material. This path is called a …..
  26. 26. Circuit A path for electric current
  27. 27. An electric circuit might be open or closed. A path for electric current
  28. 28. Closed Circuit An unbroken path for electric current (no gaps, current can flow). The light is on
  29. 29. Open Circuit A path for electric current that has a gap (no current can flow). gap The light is off
  30. 30. Most electrical devices have a switch in the circuit to make it easy to close (turn on) and open (turn off) the circuit.
  31. 31. Switch A tool to open and close a circuit switch
  32. 32. A circuit can also be opened and closed by touching two wires together. Open circuit Closed circuit No current can flow current can flow
  33. 33. A circuit can also be closed by touching those two wires to a conductor. ed circuit current can flow

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