Ram wants to make a magnet. Which one of these materials is not useful for him?

Steel

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Nickel

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Cobalt

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Wood

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Solution

The correct option is D Wood
Materials which are attracted to a magnet are called magnetic materials. Materials which are not attracted to a magnet are called non-magnetic materials. Magnets can be formed using magnetic material only. Amongst the given options, wood is a non-magnetic substance and hence it is not useful for Ram in making a magnet.

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Ram wants to make a magnet. Which one of these materials can he not use ?

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