KB001.1: Electric Charges, Static Electricity

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Charged Particles

Charges are the Particles with Electric Potentials, 2 types
- Positive charges (+)
- Negative charge (-)
Like-charges Repel each other
Unlike-charges Attract each other

Free 🔵Electrons(-): The Tiny Magic Players

Some materials, like copper, have Free 🔵Electrons(-) in outer shell of the atom, they easily drift randomly from atom to atom
Free 🔵Electrons(-) play most of the tricks of electricity (current, static electricity, flash, etc.)

Charges and field (by phet.colorado.edu)

Example with balloons (by phet.colorado.edu)

Example with door opening (by phet.colorado.edu)

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