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MAGNETISM

MAGNETISM. DEFINITION. MAGNET: A polarized piece of metal that produces a magnetic field which pulls on other materials (like iron and other metals). A magnet will also attract and repel other magnets. DEFINITION. MAGNETIC FIELD:

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MAGNETISM

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  1. MAGNETISM

  2. DEFINITION • MAGNET: • A polarized piece of metal that produces a magnetic field which pulls on other materials (like iron and other metals). A magnet will also attract and repel other magnets

  3. DEFINITION • MAGNETIC FIELD: • Magnetic forces create a field with both direction and strength

  4. Magnetic field continued • STRENGTH:Some magnets are more powerful than others based on how polarized it is (how shifted the electrons are.)Also the force of the magnetic field is stronger closer to either of the poles.

  5. Magnetic field continued • DIRECTION: The direction of a magnetic field is always from the north pole to the south pole.

  6. SOUTH POLE Extra electrons causes the south pole of a magnet to have a negative charge NORTH AND SOUTH POLES • NORTH POLE • An absence of electrons results in a positive charge at the north pole of a magnet

  7. HOW MAGNETS INTERACT • 2 TYPES OF MAGNETS: • Bar magnet – magnet that is a straight lineso that the north and south poles point in opposite directions, it does not matter how short it is or if its a box or cylinder

  8. 2 types continued • Horse-shoe magnet • Also called u-magnetand bent-magnet • These magnets are bent so that both poles of the magnet are facing the same direction.

  9. HOW MAGNETS INTERACT • OPPOSITE POLES: • OPPOSITES ATTRACT • LIKE POLES: • LIKE POLES REPEL

  10. HOW MAGNETS INTERACT • Please draw the appropriate magnetic fields for the following pairs of magnets: NS S N N S N S

  11. HOW MAGNETS INTERACT • MAKING NEW MAGNETS: • New magnets are primarily made by rubbing them against existing magnets. • This causes the metallic bonds to become polarized because they are being subjected to a large charge, either drawing all the electrons towards it, or repelling them from it. • Which pole of a magnet would draw the electrons of a metal object toward it? Which would repel electrons?

  12. How magnets interact N S N S

  13. HOW MAGNETS INTERACT • Based on the last picture, what you know about electrons and protons, and metallic and polarized metallic bonds is it possible to cut a magnet in half so that you have only a north pole on one of the resulting pieces of metal and only a south pole on the other? EXPLAIN:

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