A bar magnet was placed deep inside a sack of coal. Fine particles of coal got stuck to it. From this, can we infer that coal is attracted towards a magnet?

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Solution

We know that coal is a non-magnetic material and so, it does not get attracted towards a magnet. If a bar magnet is placed inside a sack of coal, fine particles of coal get stuck to it due to the adhesive force between them.

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