# Electric and Magnetic Fields Essay

1431 Words6 Pages
Electric and magnetic fields How magnets are magnetised and De-magnetised? You can easily magnetise a metal by having a strong magnet and a magnetisable material like a nail. Then you stroke the nail repeatedly in the same direction with the strong magnet. This makes all the domains in the material face the right way as when the nail was stroked in the same direction the domain in the nail faced that way making it magnetic. You need more than 50% of the domains to face the right way to make it magnetised. You can also make a magnet more powerful by freezing a magnet and which makes all the domains stay in the right direction for longer. There are many ways to de-magnetise a permanent magnet. One way is to heat the magnet beyond its curie point which scrambles the domains of the magnet and de-magnetises it. Another way is to repeatedly strike a magnet repeatedly with a hammer as this also scrambles the domain of the magnet. How magnets are magnetised and De-magnetised? You can easily magnetise a metal by having a strong magnet and a magnetisable material like a nail. Then you stroke the nail repeatedly in the same direction with the strong magnet. This makes all the domains in the material face the right way as when the nail was stroked in the same direction the domain in the nail faced that way making it magnetic. You need more than 50% of the domains to face the right way to make it magnetised. You can also make a magnet more powerful by freezing a magnet and which makes all the domains stay in the right direction for longer. There are many ways to de-magnetise a permanent magnet. One way is to heat the magnet beyond its curie point which scrambles the domains of the magnet and de-magnetises it. Another way is to repeatedly strike a magnet repeatedly with a hammer as this also scrambles the domain of the magnet. Which materials can experience