Magnets.

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Presentation transcript:

Magnets

What are magnets? 5 minutes – what do they do Rules Stay away from computers Don’t get anything out of the cupboards Remember to record your results stick don’t stick repel attract metal plastic rubber glass wood fabric paper

What are the rules of magnetism?

The rules of magnetism repel Poles that are the same will Poles that are different will repel attract

How does a magnet work? Magnetic field (lines go from N to S)

What might the magnetic field of the Earth look like?

Are all magnets the same? Making an electromagnet… The voltage should be set to 3v. It should only be turned higher if your teacher tells you to.

Test your magnet

breaks demagnetises stops working works better lines up deflects particles helps navigate attracts repels poles What is it like inside a magnet? Magnetic field lines help us explain how magnets work. What happens if you drop a magnet? What happens if you heat a magnet? Why is the magnetic field of the Earth useful?