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प्रश्न
What are magnetic keepers? What are they used for?
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उत्तर
Magnetic keeper: A magnetic keeper is a ferromagnetic bar made from soft iron or steel, which is placed across the poles of a permanent magnet. Magnetic keepers are used to preserving the strength of the magnet by completing the magnetic circuit.
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संबंधित प्रश्न
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Magnetic axis
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