02 insulators and conductors

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  • https://www.youtube.com/watch?v=x_yHtfGH0nI
  • https://www.youtube.com/watch?v=x_yHtfGH0nI
  • 02 insulators and conductors

    1. 1. Insulators and Conductors 1
    2. 2. Insulators and ConductorsInsulators An electrical insulator is a substance in which electrons cannot move freely from surface to surface. Electricians wear safety clothing with thick layers of insulating material to avoid electrocution. 2
    3. 3. Insulators and ConductorsInsulatorsThe charge on the surface ofan insulator stays until it isgrounded or neutralized. 3
    4. 4. Holding a charge 4
    5. 5. Insulators and ConductorsInsulators A positive or a negative charge can build up on an insulator. 5
    6. 6. Insulators and ConductorsConductors An electrical conductor is a substance in which electrons move freely throughout. 6
    7. 7. Insulators and ConductorsConductors Solid conductors are usually metals. Most aqueous solutions are conductors. 7
    8. 8. Freely moving charge 8
    9. 9. Insulators and ConductorsWhy do we get more static shocks in thewinter than in the summer? 9
    10. 10. Insulators and ConductorsBecause winter air is dryer than in thesummer and dry air is an insulator. 10
    11. 11. Insulators and ConductorsSo the winter air does not remove any of thecharges our bodies pick up. 11
    12. 12. Insulators and ConductorsThen when we touch another conductor (likea doorknob) we receive a shock as electronspass through our hand and the doorknob. 12
    13. 13. Insulators and ConductorsAirplanes are made of conductors and insulators toensure safety if struck by lighteningLightening striking 747 (@ 26:00) 13
    14. 14. Insulators and ConductorsThe airplane surface is made of a conductor so thatelectrons can pass through. 14
    15. 15. Insulators and ConductorsThe airplane surface is made of a conductor so thatelectrons can pass through. 15
    16. 16. Insulators and ConductorsThe airplane interior is made of insulators so that theelectrons cannot pass through to the passenger cabin 16
    17. 17. Insulators and Conductors 17

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