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Transcript
Script: What is electricity?
Where does electricity come from?
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Atoms contain particles that have charge
Positively charged particle = proton
Negatively charged particle = electron
Neutral or particles with no charge are called neutrons
Protons and Neutrons are found in the nucleus of the atom.
What causes electricity?
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Most of the time atoms are electrically neutral meaning they have equal numbers
of protons and electrons
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Neutral atoms have an overall charge of zero.
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Since electrons are free to move from atom to atom some atoms are left with more
protons than electrons making them positively charged atoms.
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Other atoms gain electrons giving them a negative charge.
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The movement of this electric charge generates electricity.
Electric Charge
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A charge is a measure of the extra positive or negative particles that an object has.
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When charge is separated static electricity results.
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The positive charge always stays on an object & the negative charges move to
other atoms when charge becomes separated.
Example
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When you rub a balloon on your head, you remove electrons from your hair and
leave protons in your hair.
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Since like charges repel, the strands of hair begin to push away from each other.
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If you bring the negatively charged balloon back close to your hair, it will stick to
the balloon.
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Unlike charges like that on the balloon and in your hair attract one another.
What exactly is Electricity?
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Electricity is the flow of electric charge in wires, motors, light bulbs, and other
devices.
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Electric current carries the energy (the charges) over great distances.
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The current moves along a wire or a path called a circuit.