Question

why are artificial magnet preferred over a natural magnet

Answer 1

Lodestone or magnetite is a natural magnet because it is found in nature.It is found in very few places.It looks nothing other than an ordinary stone or rock.thus,it has no regular shape and size.It has a very low attracting power.Artificial magnets are prepared by men using elements like iron cobalt nickel or their  mixture with other elements.They are much stronger than natural magnets.Depending on requirement,these magnets are mad in various shapes and sizes.

Answer 2

artificial magnet preferred over a natural magnet because
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1)we can change the direction of the field lines or we can change the poles
2)we can make the magnet very strong or very weak according to our wish
3)we can mage the effect zero whenever needed