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8J MAGNETS AND ELECTROMAGNETS

8J MAGNETS AND ELECTROMAGNETS. Magnets. What is magnetism ? Where do we use magnets ? What materials are magnetic ?. Where do we use magnets ?. Find something magnetic in the class. Aim : To investigate which metals are magnetic. 1. Brass 2. Copper 3. Aluminium 4. Iron

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8J MAGNETS AND ELECTROMAGNETS

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  1. 8J MAGNETS AND ELECTROMAGNETS

  2. Magnets • Whatismagnetism? • Where do we use magnets? • Whatmaterials are magnetic?

  3. Where do we use magnets?

  4. Findsomethingmagnetic in theclass.

  5. Aim: Toinvestigatewhichmetals are magnetic • 1. Brass • 2. Copper • 3. Aluminium • 4. Iron • 5. Zinc • 6. Tin • 7. Lead • 8. Scissors (Steel)

  6. Magnetic Materials Gold Nickel Steel / Iron Ceramics Stone Copper Wood Plastic Cobalt Aluminium Glass

  7. Magneticpoles • What are thetwoends of a magnetcalled? • Whathappenswhenyouputtwo of thesamepolesneareachother? • Whathappenswhenyouputtwodifferentpolesneareachother?

  8. Attraction & Repulsion

  9. Magneticfields • Whatdoes a magneticfield show? • Sketch themagneticfield round a bar magnet.

  10. Magnetism S N

  11. Magnetism • Which direction is the magnetic field? • Where is the magnetic field strongest? S N

  12. Now, drawthemagneticfield round a bar magnetusing a plottingcompass

  13. The Earth’s Magnetic Field

  14. Makingmagnets • Whatis a magnet? • Whatis a magnetic material? • Are magneticmaterialsalwaysmagnets? • How can youmake a magnet?

  15. Turnthenailinto a magnet…

  16. Design a compass Design a compass Theequipmentyou can use is: • a paper clip • foam • Dish withwater • A compass (tocheckyoursisright) Ifyouneedany more equipmentask Ms. Stamp.

  17. Ferrofluid - DEMO • http://youtu.be/XUz1ZI-w6LQ

  18. AF2- individual worksheet

  19. ELECTROMAGNETS • What is an electromagnet? • Why are electromagnets useful? • Where are electromagnets used?

  20. Makinganelectromagnet • Makeanelectromagnet, seehowmanypaper clips it can pick up Draw a diagram of theelectromagnet Writeabouthowyoumadeit.

  21. Maglev Train • http://youtu.be/VuSrLvCVoVk • http://youtu.be/2--43eAS1iY Extra http://youtu.be/weWmTldrOyo

  22. Labreportassessment Investigatehowone factor affectselectromagnetstrength

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