How does a magnet lose its properties?

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If the magnet is heated, hammered or dropped from a height

If the magnet is hammered and rolled

If the magnet is heated and then cooled

If the magnet is dropped from a height

answer is D.

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Detailed Solution

Explanation: A magnet loses its properties if subjected to physical stress like heating, hammering, or dropping from a height. These actions disrupt the alignment of the magnetic domains within the material, reducing its magnetism.

Final Answer: d) If the magnet is heated, hammered, or dropped from a height

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