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the strength of a magnet depends on the number of magnetic dipoles pointing in a preferred direction. To reduce the magnetic strength or to demagnetize a magnet will involve randomizing all the dipoles so that they have no preference in which orientation they are pointing. One way to do it is to heat the magnet to below its melting point. Another way is to apply alternating magnetic field to the magnet for a period of time. A rapidly changing magnetic field is usually generated by an electromagnetic energized by an alternating current.
What else can I help you with?
How does heat affect a magnet?
A permanent magnet (i.e. not an electromagnet) will be demagnetised by heating it.
How does demagnetisation of a magnet occur when you keep similar poles together?
WHEN A MAGNET IS DROPPED OR HAMMERED, VIBRATIONS CAUSED BY THE IMPACT ON THE MAGNET RANDOMIZE MAGNETIC MOLECULES and disturb the pattern of molecules of the magnet as a result magnet looses its magnetic force and becomes demagnetised.
What happens when you rust a magnet?
the magnet gets weaker
Why can a magnet be demagnetised by hammering it?
Hammering a magnet can disrupt the alignment of its magnetic domains, causing them to become disordered and reducing the overall magnetic field strength. This process can demagnetize the magnet as the domains lose their alignment and no longer exhibit a strong magnetic pull.
Why is there no black flower in the world?
is a hot magnet shorter or weaker than a cold magnet
When is a magnet field stronger when is it weaker?
A magnetic field is stronger when the magnets are closer together, and weaker when they are farther apart. The strength of a magnetic field also depends on the material the magnets are made of and their physical size.
Are bigger magnets always stronger?
No, the size of a magnet does not always determine its strength. The strength of a magnet is primarily determined by the material it is made of and its shape. Smaller magnets made from strong materials can be more powerful than larger magnets made from weaker materials.
When does the magnetic domain in a magnet produce a weaker magnet?
When the external magnetic field is removed, the magnetic domain in a magnet can produce a weaker magnet due to randomization of the magnetic moments within the domains, causing them to lose alignment. This results in a decrease in the overall magnetic field strength of the magnet.
How do you spell demagnetised?
In Australia and the UK, you would spell it "demagnetised". In the US, you would substitute a 'z' - "demagnetized".
Why do strong magnets attract both poles of weaker magnets?
coz if you try to attract a weak and a weak side it wont stick. same with the strong and strong side. But if you put a strong side next to a weak side it will attach. When a strong magnet is brought nearby the domains line up more closely with the magnetic field. The result of this reorientation is an overall magnetization of the weaker magnet.
A permanent magnet will lose magnetism?
Under some conditions, sure. Impact and intense heat for instance can render a magnet weaker.
What do you understand by demagnetization?
De-magnetism is when a magnet is no longer a magnet. For example, when a magnet becomes heated it loses its magnetism. This is because the alignment of domains (groups of atoms) is disrupted. This is due to the expansion of the domains; the energy to expand is provided from the heat. During the expansion, the domains require more space therefore disrupting the alignment. This causes a magnet to become weaker and weaker to the point where it is no longer a magnet.... Hope this helps! :)
