Term
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Definition
| a push or a pull exerted by a magnet |
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Term
| What must all magnets have? |
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Definition
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Term
| What happens if two north ends of a magnet are brought together? |
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Definition
| they repel or push each other away |
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Term
| What happens if a north enad and a south end of magnets are brought together? |
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Definition
| they attract or pull towards each other |
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Term
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Definition
| the area surrounding a magnet in which the magnetic force exists |
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Term
| Where is the magnetic force the strongest? |
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Definition
| at the poles of the magnet |
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Term
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Definition
| the production of a magnetic field by an electric current |
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Term
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Definition
| a magnet that is made by passing an electric current through a coil of wire wrapped around an iron core |
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Term
| Why are electromagnets useful? (2 things) |
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Definition
| they can be turned on and off; their strength can be controlled |
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Term
| How can you increase the strenght of an electromagnet? |
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Definition
| add more coils of wire, increase the size of the iron core, increase the strength of the energy source |
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