Making small magnets by breaking up a larger magnet.
5G10.20 • D+35+4
Making small magnets by breaking up a larger magnet. A hacksaw blade (brittle steel) can be magnetized by stroking it a number of times with a strong magnet. Stroke each time in the same direction, with the same pole (north or south) rubbing against the hacksaw surface. To see that the blade is a magnet, place one end near the compass needle and observe which end of the needle is attracted. Then place the opposite end of the blade near the needle and watch the needle swing in the opposite direction. The blade can then be snapped by hand into smaller pieces. Each piece is also a magnet.
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