Answers

2015-04-04T18:58:44+05:30
A.) Magnetic substances- iron, cobalt and nickel.
     Non-magnetic substances- copper, phosphorous, soil, water(it's diamagnetic -slightly repelled when brought close to a magnet but not quite noticeable) , wood, oil.

b.) In olden times, a magnet was placed in a compass by magnetizing an iron needle with the help of stroking a lodestone against it.

Hope i helped u:) 
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