Static electricity

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REVISON AND BASICS FOR STATIC ELECTRICITY :)

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Static electricity

  1. 1. STATIC ELECTRICITY
  2. 2. Only two types of charge! Positive Charge(protons – therefore innuclei of atoms ) Negative Charge(electrons – thereforeorbiting atoms – andcan be ‘brushed off’onto other atomsmaking ions
  3. 3. Only electrons move… Positive ChargedObject – too fewelectrons Negative ChargedObject – too manyelectrons Net charge is ALWAYSdue to ELECTRONtransfer – protonsmoving about wouldchange the elementsyou are dealing with.
  4. 4. Opposite Charges attract
  5. 5. …Like Charges Repel
  6. 6. It all depends on gravity… Whether you can see acharged object ‘react’ toanother one depends onweight. Two forces are inoperation – electric forceand gravitational force. If the electric force isbigger the object can beseen defy gravity… or inthe case of the object onthe left inertia andfriction !
  7. 7. Charging by Friction Some objects are more attractiveto electrons than others. If yourub a balloon (very attractive toother atoms’ electrons) togetherwith a woollen jumper. It will‘steal’ some of the electrons andleave the jumper postive. The balloon will have becomepositively charged by friction.
  8. 8. Charging by Induction If the balloon is brought near to aneutral object the charged regionaround it (its electric field) will affect theelectrons in the neutral object. It willmake them move away from it – givingthe surface of the neutral object near tothe balloon a positive charge. The balloon will then be attracted to itand will stick to it.
  9. 9. THE END
  10. 10. THE END

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