Magnetic fields.

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Presentation transcript:

Magnetic fields

MAGNETS, NON MAGNETS, AND MAGNETIC (REVIEW) What makes a material a permanent magnet? What makes a material magnetic? On your worksheet draw at least 5 arrows in each material to demonstrate what happens in a magnetic material when it is brought near a magnet.

So the magnetic field causes the change in the domains of the magnetic material (like a paperclip) Is it possible for us to “See” the magnetic field?

iron filings near a magnet https://www.youtube.com/watch?v=j8XNHlV6Qxg

Ferrofluids and magnetic fields https://www.youtube.com/watch?v=L8cCvAITGWM

Looking to the future MSMs Magnetic Shape Memory alloys (MSMs) are metals that change their size and shape when exposed to a magnetic feild

Uses of MSMs “micropumps” for delivering small amounts of medicine What do you think we could do if we could shape metal when we wanted?