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Electrical conductors
   and insulators
 An electric circuit is a path along which
  current flows.

 Current can only flow through a closed circuit.

 Battery...
Do all materials allow electricity to flow
through them?

What kind of materials allow electricity
to flow through them?
Identify electrical conductors and
electrical insulators.
Infer that good conductors of
electricity are generally good
conductors of heat.
Heat conductors are materials that allow
heat to pass through it easily.
Examples: Metals - silver, iron, copper, aluminum...
Electrical conductors are materials that
allow electric current to flow through.
What types of materials are good electrical
conductors?




 Alumiuium?       Rubber?         Wood?
Electrical insulators are materials that do
not allow electric current to flow through.
What types of materials are electrical
insulators?




      Glass?            Pencil lead?
Use of a circuit tester: To test whether the
material is a good electrical conductor.




          Example of a circuit t...
Step 1: Set up the circuit   Step 2: Place the object
tester as shown above.       between the open ends of the
          ...
If the bulb lights up, it
means the material allows
electric current to flow
through the closed circuit.


 The brighter...
 Place the two aluminum
plates into the liquid
tested.
 If the bulb lights up, a
closed circuit is formed,
allowing curr...
 Electrical conductors are materials that allow
electric current to flow through.
Examples: salt water, metals such as co...
 Good electrical conductors are generally
good heat conductors. Examples: steel, iron
 Electrical insulators are materials that do
  not allow electric current to flow through.
  Examples: plastics, wood, ru...
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Electrical Conductors And Insulators

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Transcript of "Electrical Conductors And Insulators"

  1. 1. Electrical conductors and insulators
  2. 2.  An electric circuit is a path along which current flows.  Current can only flow through a closed circuit.  Battery provides energy in a closed circuit and current transports energy from the battery to the bulb.
  3. 3. Do all materials allow electricity to flow through them? What kind of materials allow electricity to flow through them?
  4. 4. Identify electrical conductors and electrical insulators.
  5. 5. Infer that good conductors of electricity are generally good conductors of heat.
  6. 6. Heat conductors are materials that allow heat to pass through it easily. Examples: Metals - silver, iron, copper, aluminum. Silver Copper
  7. 7. Electrical conductors are materials that allow electric current to flow through.
  8. 8. What types of materials are good electrical conductors? Alumiuium? Rubber? Wood?
  9. 9. Electrical insulators are materials that do not allow electric current to flow through.
  10. 10. What types of materials are electrical insulators? Glass? Pencil lead?
  11. 11. Use of a circuit tester: To test whether the material is a good electrical conductor. Example of a circuit tester
  12. 12. Step 1: Set up the circuit Step 2: Place the object tester as shown above. between the open ends of the wire or crocodile clips.
  13. 13. If the bulb lights up, it means the material allows electric current to flow through the closed circuit.  The brighter the bulb, the better the conductor of electricity is the material.
  14. 14.  Place the two aluminum plates into the liquid tested.  If the bulb lights up, a closed circuit is formed, allowing current to flow through it.  The liquid is a conductor of electricity.
  15. 15.  Electrical conductors are materials that allow electric current to flow through. Examples: salt water, metals such as copper, aluminium and non-metals like graphite (a form of carbon). Copper Aluminium Graphite
  16. 16.  Good electrical conductors are generally good heat conductors. Examples: steel, iron
  17. 17.  Electrical insulators are materials that do not allow electric current to flow through. Examples: plastics, wood, rubber, glass. plastic rubber
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