Attractive design
Question: How are permanent magnets made?
Answer: Iron molecules align themselves naturally within small individually
magnetic groups called domains. Each domain is like a microscopic compass needle
or bar magnet, and has two poles, north and south.
In an unmagnetised piece of iron the domains are as scrambled as a
well-stirred shoe box full of compass needles. As a whole, such a shoe box will
not behave as a magnet.
If the domains in a piece of iron become aligned, with all microscopic north
poles facing the same way, then the iron becomes a magnet or, if you…
