What is the principle of an electromagnet

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Lodestone (magnetite), an igneous rock formed from molten material, is a natural magnet. How could lodestones become magnetized? What is the principle of an electromagnet?

Reference no: EM131237125

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What is the principle of an electromagnet : Lodestone (magnetite), an igneous rock formed from molten material, is a natural magnet. How could lodestones become magnetized? What is the principle of an electromagnet?

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