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![When the free ends of a tester are dipped into a solution, the magnetic needle shows deflection. Can you explain the reason? When the free ends of a tester are dipped into a solution, the magnetic needle shows deflection. Can you explain the reason?](https://i.ytimg.com/vi/lFY4P6IL4BM/maxresdefault.jpg)
When the free ends of a tester are dipped into a solution, the magnetic needle shows deflection. Can you explain the reason?
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