Bar Magnet Iron Filings - 搜索图片

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Question 9 Boojho dipped a bar magnet in a heap of iron filings an…
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magnetic fields - Why iron filings sprinkled near a bar magnet aggre…
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Bar Magnet showing magnetic field w iron filings Stock Photo - Alamy
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Iron filings attracted to a bar magnet - Stock Video Footage - Dissolve
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youtube.com > Physics with Simon Poliakoff
Iron filings to show magnetic field around a bar magnet
YouTube · Physics with Simon Poliakoff · 4559 次播放 · 2021年3月3日
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File:Powder steel on magnet.jpg - Wikimedia Commons

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