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13 Cards in this Set
- Front
- Back
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When you rub two objects together, what can happen?
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negative electric charges can move from one object to the other
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What are insulators?
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A material through which electric current does not pass easily.
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What two types of charges can an object have?
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negative and positive
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What must you have to run machines at home?
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A strong electric current
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Usually the negative and postive charges an object has are _______?
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balanced
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When two object have the same charge what happens?
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They repel each other or push away.
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What is resistance?
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Does not allow current to flow easily through it.
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How does a battery provide an electric current?
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Whent he battery is in a closed circuit, the negative charges flow out from the negative end, through the wiresm and back to the positive end.
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What is a conductor?
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a material through which electric current passes easily.
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What causes you to feel an electric shock?
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Negative charges can build up on you and then floe to another object when you touch it.
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When two objects have different charges, what happens?
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They pull together.
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An electric current must have what to flow?
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A closed path, or a closed circuit.
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What is an electric current?
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The flow of negative charges through matter.
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