Question by яαиdoм єpicиess: Why does iron become a magnet when you stroke it with a magnet?
It’s for my Science homework and what we did was stroke a magnet and an iron nail to make it magnetic. The iron nail then attracted a bunch of paperclips which held for 30 seconds exact. (meaning we made the iron nail a strong magnet just by stroking it)
So how does the nail become magnetic and why? Thanks 🙂
Answer by Andrew Smith
Each piece of iron contains many tiny segments ( magnetic domains ) that are magnetized already.
But they point in many different directions so they effectively cancel each other out.
By stroking the bar we are using energy to line up some of these domains thus creating a net magnetic field.
Note that we didn’t really create magnetism, we just organized it.
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