Which type of material is used to make electromagnet?
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iron has a relative permeability of 5,000 when it is 99.8 percent pure, and the relative permeability of soft iron with 99.95 percent purity is a massive 200,000. This huge relative permeability is why iron is the best core for an electromagnet.
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electromagnet: A magnet made of an insulated wire coiled around an iron core (or any magnetic material such as iron, steel, nickel, cobalt) with electric current flowing through it toproduce magnetism.
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