iron, nickel, cobalt are called ferromagnetic materials.
Substances that are repelled by magnets are said to be diamagnetic whereas those which are strongly attracted i.e. Iron, steel, cobalt and nickel are magnetic substances, while wood, glass and copper are examples of non-magnetic substances. Ones are those that are not affected by magnets. Magnetic materials are those that are strongly attracted by magnets while non-magnetic Other magnets produced artificially by man are called artificia l magnets. Natural magnet which was discovered by the Chinese 2,000 years ago. Magnets are substances that are able to attract and hold items.
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