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Monday, April 28

  1. page 3. Electric Currents and Magnetism edited ... Electric Currents and Magnetism Around a magnet is an invisible force called a magnetic field…
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    Electric Currents and Magnetism
    Around a magnet is an invisible force called a magnetic field. Field lines are used to represent where the field is located. We can "see" a magnetic field by sprinkling iron filings on a magnet.
    http://m.youtube.com/watch?v=N1as-po1rGw
    The movement of charges cause magnetism. Electric currents are basically moving electrons; they produce magnetic fields. If you have a "live" wire, the field lines are in a circle around the wire. In the same way, an electric current can be produced by changing magnetic fields. If you put a metal loop between the south pole and the north pole of two different magnets and move the loop in and out of the fields, you can produce an electric current.
    Take a moment to check your understanding with the following quiz:
    (view changes)
    3:56 pm

Saturday, May 1

  1. page 5. Real World Applications edited ... Consider this assignment: You are working at your summer job, cleaning up a job site for a ho…
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    Consider this assignment:
    You are working at your summer job, cleaning up a job site for a house builder. Now that you know how to make an electromagnet, your assignment is to make a larger one that you could use to pick up nails and tacks. Good luck, and go save some tires!
    {nails.png} {file:///C:/Users/FAMILY%7E1/AppData/Local/Temp/moz-screenshot.png} {nails.png}
    {magnet_and_nail.gif} Click here to go on. . .

    (view changes)
    5:53 pm
  2. page 5. Real World Applications edited ... How would you use this knowledge outside of picking up BBs? One day you may become an enginee…
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    How would you use this knowledge outside of picking up BBs?
    One day you may become an engineer and be asked to design a huge electromagnet that picks up scrap metal or junk cars. But beyond that, electromagnets are used in everyday life. They can be found in doorbells, in security systems, in televisions, in loudspeakers, and the list goes on.
    YouConsider this assignment:
    You
    are working
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    one that a carpenteryou could use
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    and tacks. You couldGood luck, and go save a lot of tires that way!
    some tires!
    {nails.png}

    (view changes)
    5:48 pm
  3. file nails.png uploaded
    5:47 pm
  4. page 5. Real World Applications edited Real-World Applications How would you use this knowledge outside of picking up BBs? One day yo…

    Real-World Applications
    How would you use this knowledge outside of picking up BBs?
    One day you may become an engineer and be asked to design a huge electromagnet that picks up scrap metal or junk cars. But beyond that, electromagnets are used in everyday life. They can be found in doorbells, in security systems, in televisions, in loudspeakers, and the list goes on.
    You are working at your summer job, cleaning up a job site for a house builder. Now that you know how to make an electromagnet, your assignment is to make a larger one that a carpenter could use to pick up nails and tacks. You could save a lot of tires that way!

    (view changes)
    5:43 pm

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