static electricity...van de graaff generators mon 6:43 am q search add slide static electricity...
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Static Electricity
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Charges• If an object has lots of electrons, it is negatively
charged. • If it does not have many, it is positively charged. • Negative charges are able to move because electrons
are able to move. Protons are ‘stuck’ in the nuclei of atoms, so positive charges can’t move.
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STATIC = NOT MOVING• Static electricity does not flow
• Instead it causes charge separation: when a negatively charged objects comes near neutral objects.
The negatively charged object repels the electrons in the neutral object, leaving an area of positive charge.
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Induction• Because electrons can move, objects can take on a
charge when an another charged object is brought close to it.
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Van De Graaff
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1) Like charges repel 2) Opposite charges attract.
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Static• The buildup of electrons in an object gives it a static
charge.
• During a discharge, electrons “jump” from an object with many electrons to an object without many.
• Electricity always “wants” to flow into the ground and find the easiest path to the ground. This is another way to discharge an object.
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Exit Slip1. Explain how the Van de Graaff generator builds up a
static charge?
2. What is the basis of static electricity?
3. Where does electricity come from?
4. What does it mean to be charged?