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Electrostatics - PowerPoint PPT Presentation

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Electrostatics. Electrostatics. The branch of science dealing with static charges and their electric fields The Greek word for amber, ήλεκτρον electron, was the source of the word \'electricity\'. Static Electricity. A little history.

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  • The branch of science dealing with static charges and their electric fields
  • The Greek word for amber, ήλεκτρον electron, was the source of the word \'electricity\'
a little history
A little history
  • The science of electricity has its roots in observation, known in 600 BC that a piece of amber rubbed with animal fur would attract straw, feathers
  • Thales of Miletos (Greece) in credited with this discovery
what is amber
What is amber?
  • Amber is the fossilized form of tree resin…not the same as sap.
  • Resin is similar to our scabs. It flows out of the tree to plug a hole.
benjamin franklin
Benjamin Franklin
  • 1752 By tying a key onto a kite string during a storm, Ben Franklin , proved that static electricity and lightning were the same.
the leyden jar
The Leyden Jar
  • Progress quickened after the Leyden jar was invented in 1745
  • The Leyden jar stored electricity and therefore could be studied at length
the battery
The Battery
  • A new interest in current began with the invention of the battery. Luigi Galvani had noticed (1786) that a discharge of static electricity made a frog\'s leg jerk.
  • Galvani thought the leg supplied electricity, but Alessandro Volta thought otherwise. He showed that the metal plate and the Leyden jar were different metals and produced a current. He built the voltaic pile, an early type of battery, as proof.
a quick review of the atom
A quick review of the atom

Every atom has a ______ charged nucleus surrounded by ____ charged electrons.




  • _______ move in and out of fixed pathways around the nucleus
  • Two kinds: positive and negative (terms coined by Benjamin Franklin)
  • Like charges ________
  • Unlike charges ______



be glad you are not a cat
Be glad you are not a cat
  • http://www.youtube.com/watch?v=bcLDx_oiSMY
let s review
Let’s review


Balloon on wall

let s review1
Let’s review



let s review2
Let’s review


Water and balloon

let s review3
Let’s Review

#5 2 balloons held near each other

bill nye
Bill Nye
  • http://www.youtube.com/watch?v=Z-77IzaXGcg