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Electromagnets_Coelho.notebook
Electromagnets
Energy Interactions 5T1U2A05
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In the past, scientists wondered if electric charge and magnetism were related.
They knew that charged objects and magnets both produce a force that can pull or push without touching.
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The discovery that an electric current can turn a compass needle proved that the two forces are related.
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Electromagnets_Coelho.notebook
What is this?? How does it produce electricity??
How does an electromagnet use a switch to make it a working system?
Electromagnet:
a temporary magnet created when electricity passes through wire wrapped around an iron bar
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Electromagnets_Coelho.notebook
**Make electromagnets then...
Discuss:
1. Explain how you designed and made your strongest electromagnet. How many paper clips were you able to life from the tabletop?
2. How is an electromagnet different from a bar magnet? How is it the same?
Electromagnets can be turned on and off by closing the electrical circuit; bar magnets cannot. Both types of magnets are attracted to only certain types of materials and not others. Both attract materials at either end.
3. How is an electromagnet a system?
An electromagnet has parts that work together in order to make a complete electrical circuit that produces magnetic effects. Removing ay part of the electromagnet would cause it to not work.
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Attachments
5T1U2A07 CUC Phys. Sci. Junkyard Science.ppt