Download Welcome Back Scientists!

Welcome Back Scientists!
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Today:
Return Electromagnets Inquiry Scores
Discuss the Revision Process
Interactions between permanent and
Electromagnets: Building a Motor
More on Magnets and Electricity
Making an Electric Motor
Follow the
Instructions
Carefully!!
We Know That Electric Currents Produce
Magnetic Forces
So moving electrons create a magnetic force
 And magnetic fields can interact to create motion (motors!)
 But what about the opposite? What is the effect of magnetic
force on electrons?
 http://phet.colorado.edu/en/simulation/legacy/faraday
 https://www.youtube.com/watch?v=yA8gZM3fghc
 So magnetic fields can cause electrons to move in a wire
 And electrons moving in a wire is called…
 Electricity!!! – so the reverse process of a motor
GENERATES electricity (what do you think we call that?
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So…
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Electricity creates magnetism which we use to create motors that change
electrical energy into kinetic energy
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And kinetic energy can be used to move magnets around coils of wire
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This creates a current in the wire
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The current in the wire can be transmitted and used by other things (like motors)