Electropermanent magnet - Wikipedia
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magnet summary | Britannica
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Is there any simple, low-energy way to make a permanent magnet able to turn 'on and off' (similar to an electromagnet)? - Quora
Electropermanent magnet - Wikipedia
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Magnets with an OFF Switch
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Magnets: Types, Applications, Manufacturing, and Magnetizing Process
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The Ultimate Guide To Gauss - FIRST4MAGNETS | Blog
