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21 July, 14:28

Why was glass or plastic used to separate the filings from the magnets in the experiments?

The experiment required me to place a bar magnet on a table, then place a sheet of glass or plastic over the magnet before sprinkling the filings over it. I had to do this for both a bar magnet and a horseshoe magnet.

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  1. 21 July, 17:02
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    The glass or plastics are non-magnetic materials, which means that they wouldn't be affected by the permanent magnet that you will use. They act as a virtual spacer between the magnet and the sprinklings. The sprinklings will orient themselves following the shape of the magnetic field created by from the magnet.
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