Conductors/Insulators, and Field Lines Static Electricity Conductors/Insulators, and Field Lines

Electrostatics Study of electric charges that can be collected and held in one place

Opposites Attract I will call these positive and negative Two like charges (positive/positive or negative/negative will repel) Two unlike charges will attract

I found the electron! I am the master!! Back to the Basics Thomson and Rutherford discovered the electron and proton When energy is added the electron can jump from their atom When two neutral objects are rubbed together they will become charged (electrons move to one) You wouldn’t be anything without my protons!

Conductor/ Insulators Insulator- Charges cannot flow easily through it (rubber, plastic, glass, dry air) Conductor- Allow charges to move easily through (metal) Think- How does the electroscope work?

Critical Thinking… Originally it was proposed that electric charge is a type of fluid that flows from objects with an excess of the fluid to objects with a deficit. Why is the current two-charge model better than the single-fluid model?

Ways to Charge: Conduction- a charged object touches a neutral body Induction-charges do not move to or from the material but go to separate sides- NO touching

A force?.. It’s Electric Boogie, woogie, woogie! Can be attractive or repulsive It is stronger when the charges are closer together

Coulomb’s Law F=Kqaqb/r2 Force is Inversely related to the square of distance Directly related to the charge Unit of charge- C- the coulomb K- constant 9x109

Think What would happen to the charge is The distance doubled The distance halved The charge doubled The charge halved

Electric Fields Michael Faraday If an electrically charged particle can create a force on another object , then it must be changing the change the space in between them! I will call this Electric Fields! Michael Faraday

More Vectors! The arrows represent strength of the charge and direction The strength of the field is represented by the spacing between the lines Always point away from positive and towards negative

What a single field looks like Who says science isn’t cool?!

More than one charge……

Draw in the missing field lines + - +

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