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Hello!
What is the lifetime of a permanent magnet? How we calculate it?
Thanks
What is the lifetime of a permanent magnet? How we calculate it?
Thanks
satya98 said:How far we can generate electricity from a rare Earth magnet(permanent)?
Antiphon said:Indefinitely. The energy doesn't come from the magnet. It comes from whatever is pushing the magnet near a wire.
pallidin said:From an earlier PF post of mine:
"In your context, magnetism, such as with a magnetized iron bar or neodymium(for example) composition DOES have a "lifespan"
A "magnetised" iron bar effects a "dissorientation" that is not "normal"
In time, the iron bar will re-orient into a non-magnetic, normal state.
Not sure about the figures, but I recall that it is somewhere around 300+ years for an "iron" magnet, and several thousand(perhaps 10's of thousands) for neodymium.
Again, I may have my figures wrong in exact detail, but nonetheless, YES... there is a "lifespan"
Source: https://www.physicsforums.com/archive/index.php/t-121135.html
Antiphon said:Indefinitely. The energy doesn't come from the magnet. It comes from whatever is pushing the magnet near a wire.
satya98 said:How long I can generate electricity by this process if I shake it for a life time
jarednjames said:For a lifetime.
satya98 said:I am working on project regarding this concept. If , what we thought is true, then a generator of life time validity is going to be invented
A permanent magnet is a material that produces a magnetic field without the need for an external electric current. Its lifespan is important because it determines how long the magnet can maintain its magnetic properties and functionality.
The lifespan of a permanent magnet is affected by several factors, including the strength of the magnetic field it is exposed to, the temperature it is exposed to, and the material it is made of.
The duration of a permanent magnet's lifespan can be calculated using the Curie temperature, which is the temperature at which the magnet loses its magnetic properties. This can be determined by the material the magnet is made of and its specific Curie temperature.
Yes, the lifespan of a permanent magnet can be extended by taking proper care of it and preventing it from being exposed to high temperatures or strong magnetic fields. Additionally, using a magnet with a higher Curie temperature can also increase its lifespan.
Some common signs that a permanent magnet is reaching the end of its lifespan include a decrease in its magnetic strength, changes in its physical appearance, and a decrease in its ability to attract other magnetic materials.