Mag Elec

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Mag Elec

  1. 1. Pa Ly Magnets & Electricity
  2. 2. Your Thoughts <ul><li>What are magnets? </li></ul><ul><li>How do we use magnets? </li></ul><ul><li>How do magnets work? </li></ul>
  3. 3. Magnets <ul><li>Magnets come in different shapes and sizes. </li></ul><ul><li>Horseshoe shaped magnets. </li></ul>
  4. 4. Magnets continues… <ul><li>Circular Magnet. </li></ul>
  5. 5. Magnets continues… <ul><li>Bar shaped magnet </li></ul><ul><li>Notice: N orth and S outh poles of the bar magnet. </li></ul>
  6. 6. Magnetic Field Lines <ul><li>Magnetic field lines travel from the magnet’s north pole to it’s south pole. </li></ul><ul><li>The poles cause electrons to spin the in the same direction. </li></ul><ul><li>Field lines cannot be seen with your eyes. </li></ul>
  7. 7. Moving Magnet <ul><li>Faraday discovered that when a magnet is moved inside a coil of wire, electrical current flows in the wire. </li></ul><ul><li>Copper is a good metal to use for a wire because it has electrons that are loosely held. </li></ul>
  8. 8. Magic Magnets <ul><li>Watch magnets in action! </li></ul>
  9. 9. Inclass Assignment <ul><li>Group activity. 4 students/group. </li></ul><ul><li>Develop 5 questions about the magnet. </li></ul><ul><li>Ex. Where are the poles located on a circular magnet? </li></ul><ul><li>Ex. How many paper clips linked in a chain can a bar magnet hold? </li></ul><ul><li>Work together for the next 20 minutes to answer the 5 questions, followed by group presentations. </li></ul>
  10. 10. Conclusion/Summary <ul><li>Questions? </li></ul><ul><li>Textbook </li></ul><ul><li>Homework </li></ul>

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