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11 Cards in this Set
- Front
- Back
Atoms
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Made of
-Protons -Electrons -Neutrons Protons have positive charge, electrons have negative charge. Neutrons are neutral. Electrons move from atom to atom. More electrons=Negative charge More protons=Positive charge |
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Force
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Attraction between oppositely charged particles.
Same charge=repel each other |
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Electric Fields
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Area over which an electric charge exerts a force.
Strongest near charged particle. --See Figure 1-3 |
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Law of conservation of charge
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Charge is never created or destroyed. Charge is transfered from one object to another.
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Friction Method
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-Rubbing two objects together causes charge.
-Balloon & hair |
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Conduction Method
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-Direct contact
-electrons flow from one object to the other -conductors let charges move freely -insulators don't |
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Induction Method
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-rearrangement of electric charges
-neutral comes close to charged -no contact |
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Static electricity
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transfer of electrons from one object to another w/o further movement
-buildup of electric charges on an object |
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Elctric discharge
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the loss of static electricity as electric charges move off an object
-example: lightning |
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lightning rods/grounding
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put on top of buildings as lightning protection
-earth is good conductor; easily accepts or gives up electric charges -lightning rods attached to ground through wire -lightning goes into earth when in contact w/ rod |
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electroscope
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-detects electric charges
-neutral: leaves together +/- repel eachother |