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Static Electricity

Static Electricity. Review: What is inside the atom?. The atom is made of 3 kinds of particles. The electron The proton The neutron. The Atom. -. -. +. o. o. -. +. +. +. o. o. o. +. +. +. -. -. -. -. Charges. +. +. -. -. Charges. +. -.

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Static Electricity

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  1. Static Electricity

  2. Review:What is inside the atom? • The atom is made of 3 kinds of particles. The electron The proton The neutron

  3. The Atom - - + o o - + + + o o o + + + - - - -

  4. Charges + + - -

  5. Charges + -

  6. Insulators and Conductors • Insulators don’t let electrons flow through them • Conductors let electrons flow through them Electrons stay stuck on the surface and don’t move— That’s STATIC ELECTRICITY!

  7. Charged Objects + - + - + - Neutral Object + + + - + + + - - - + - Positively Charged Object Negatively Charged Object

  8. How Do They Become Charged? • Contact Electrons get passed from one object to the other when they touch • Induction Electrons in the object move away or towards another charged object is placed close to it

  9. Friction

  10. - + - + + - - + - - + + + - + - - + - +

  11. - - + - + + - - + - - + + + - + - + - +

  12. - - - + - + + - - + - + + + - + - + - +

  13. - - - - + - + + - - + - + + + - + - + +

  14. - - - - - + - + + - - + - + + + + - + +

  15. - + - + - + - - + - + + - - + - + + - +

  16. What happens when you rub a balloon on your head and put it against the wall?

  17. http://phet.colorado.edu/sims/balloons/balloons_en.jnlp

  18. Uses of Static Electricity Spraying a Car Positive Car Negative Spraygun The paint spreads out as each negative drop repels No paint is wasted as the positive car attracts the negative paint

  19. Removing Smoke from Power Station Chimnies No smoke leaves the chimney Positive Plate Negative Plate Charge up the Smoke

  20. Earthing Petrol Tankers Petrol rubbing against the pipe can build up a static charge which could cause an explosion The tanker is joined to the ground with a wire to stop a charge building up

  21. Lightning

  22. What causes lightning? • Lightning is actually just static electricity on a much larger scale. • The rubbing is caused by air moving around • In thunderclouds bottom is usually negative and top is positive.

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