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How to demagnetize a magnet?
A magnet is an object that has a magnetic field. The word magnet comes from the Greek "magnítis líthos" (μαγνήτης λίθος), which means "magnesian stone". Magnesia is an area in Greece (Now Manisa, Turkey ) where deposits of magnetite have been discovered since antiquity. How to demagnetize materials Permanent magnets can be demagnetized in the following ways: ~ ~ ~ ~ ~ ~ ~ ~ ~ ~
- Heat. Heating a magnet past its Curie point will destroy the long range ordering.
- Contact. Stroking one magnet with another in random fashion will demagnetize the magnet being stroked, in some cases; some materials have a very high coercive field and cannot be demagnetized with other permanent magnets.
- Hammering and/or Jarring. Such activity will destroy the long range ordering within the magnet.
- Being placed in a solenoid which has an alternating current being passed through it. The alternating current will disrupt the long range ordering, in much the same way that direct current can cause ordering.
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Dropping it on a hard surface
A "degaussing coil" is used to demagnetize the cathode ray tube (CRT) types of television. LCD and plasma type TVs would NOT need this done. What would happen on CRTs is if th…ey were exposed to some other external magnetic fields, it would cause the electron beam that creates the illumination on the screen to deviate from its intended position, thereby causing color "splotches". The degaussing coil is a round-shaped hoop usually powered by a 120 VAC wall outlet (in the US) creating a fluctuating magnetic field. The technician starts close to the face of the TV and moves the hoop in a circular motion (you'll see the screen make some really rainbow-like colors) and SLOWLY backs it away from the screen. When you no longer see any effect from the degaussing coil, the process is complete. Newer TVs usually had a degaussing coil built into the TV set, which it would energize occasionally to keep the screen degaussed.
Rapidly rub the iron with the steel magnet for approximately 2 minutes for every pound of iron. Repeat on all sides of the piece of iron. Repeat process as needed until demagn…etized.
To demagnetize (degauss) a metal, you can heat it above its Curie temperature and cool it and the magnetic properties will not return. But this is probably not what we'r…e looking for. Degaussing a metal is usually done by "sweeping" it with an alternating magnetic field. That what a degaussing coil does. It's often powered by the 60 cycle per second AC field of the power grid (50 Hertz in lots of places other than the US). Take a coil, include enough windings in it to provide sufficient inductive feedback (so you won't short the line) and you've got a degaussing coil. You may or may not want to include a core. Bulk tape erasers (they're still around) have a core, and TV's with CRT's can be degaussed with a coil that does not have a core built in (it's an air core inductor). The coil (with or without core) has a switch and a power plug. Plug it in, turn it on, and either move the magnet you want to demagnetize around in the field or move the field around the magnet. Slowly move the field away from the (now demagnetized) magnet to decouple it, and turn it off. You've "swept" the magnetic field from the magnet. Tool degaussers work the same way. The duty cycle of degaussers varies, and they come in different sizes and shapes, depending on the application. The heart of the degausser is the AC coil, with or without core. Go to a site like eBay and use "demagnetizer" or "degausser" in your search argument and look at the pictures. Some portable units have a battery to power them up, but the battery will be tied to a circuit that creates AC or pulsating DC (with its "cycling" magnetic field) to provide the degaussing action.
demagnetism is when you remove the magnetism from certain magnetic objects causing magnets not to attract to metal anymore or as strong as it once did
When a magnet becomes demagnetized whats really happening is the arrangement of the domains is getting out of particular arrangement. When electrons are randomly arranged th…ey cancel each others field and overall effect is zero. When a stronger magnetic field is applied to the object, its magnetic effect can be restored.
There are molecules in a magnet that allow it to stick to other things. It has something to do with positive and negative charges or atoms in an atom cloud, but none of that i…s important unless you are a scientist. But dropping a magnet could scrape off those important molecules causing it to have less magnetism. It's not that big a difference, but should still be avoided. A.A permanent magnet works because the individual magnetic fields of the molecules in the material are mostly aligned. It is the net effect of this magnetic alignment that we experience. Dropping a permanent magnet onto a hard surface sends vibrations rippling through the material, thus causing some of the molecules to change position and out of magnetic alignment. A magnet may have to be dropped or hit repeatedly to become completely demagnetized.
Because the chemical nature of iron remain unchanged.
To demagetize a magnet you could smash one if the ends with a hammer. this will cause the order of atoms to rearange so that it's not magnetic.
By heating it up and then quickli cool it under cold water, by hitting a magnet with a hammer or simply by dropping it on a hard floor.. Hareema Amber
Demagnetization is the removal of a permanent magnetic field from an object. Such as the "degaussing" of a CRT to remove color shifting, or the erasing of a magnetic medium (t…ape, floppy...).
Repeated striking, heating, or using AC current will demagnetize a magnet. A small magnetic field may remain. It can be demagnetised by: -dropping it many times -hammering it …many times -heating it over a flame Heat and impact
Drop it on the floor a few times. . Hit it with a hammer a few times. . Heat it red hot in the stove flame. . Wrap several turns of wire around it and run a high AC current… through for a while.
Does the Temperature of a magnet affect its strength
a way to demagnitize somthing is to not get it magnetized :) simple as that :)
by heating to an extreamly high temperature