Physics

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Author:
ghoran
ID:
216592
Filename:
Physics
Updated:
2013-04-29 13:58:41
Tags:
Keeping things moving
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  1. The shape of magnetic field around a magnet is shown by lines
  2. Explain the diagram on the previous slide
    Arrows on the diagram point away from north and towards south to show the direction of the magnetic field . The closer the lines are the stronger the magnet is . The magnetic field can be seen by placing the magnet under a piece of paper with small iron filings on top . The filings line up in the shape of the field . The direction of the arrows can be seen by placing a compass in the field
  3. A magnetic field is also created if
    electric current moves through a conductor
  4. in a diagram show the magnetic field around a straight wire
    • the magnetic field around a straight wire is circular , at right angles to the wire .
    • the magnetic field around a straight wire isn't very strong
  5. Reversing the direction of the current will
    reverse the magnetic field direction

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