ホーム » リソース » よくある質問 » 磁石&磁気 » 電磁石とは何ですか?
電磁石は、鉄心に電線コイルを円筒状に巻いて磁場を発生させるものです。磁場はその内側の開口部の全長にわたって均一になります。
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