How Long Can Magnets Maintain Their Properties in a Repelling Magnetic Field?

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In summary, the longevity of a permanent magnet's magnetic properties depends on its material and environment. Heating and stray magnetic fields can decrease its lifespan, but a good magnet can maintain its magnetism for years. The diagram is unclear and does not provide enough information to accurately answer the question.
  • #1
The_Thinker
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Just a few simple questions about magnets:

1) If 2 permanent magnets are placed one on top of the other such that one magnet repels the other and therefore the second magnet levitates and assuming that this is a ideal situation and the magnet is not knocked off its vertical levitating position, how long would the two magnets maintain their magnetic properties? - basically how long would 2 permanent magnets last in a repelling magnetic field without losing its magnetic properties?

2) If a have 2 cylinders like shown in the diagram, with the two cylinders repelling each other... how long would the magnets last?

Thanks... :)
 

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How long a permanent magnet keeps its magnetism depends on several factors - mainly the material its made from and its environment. Heating magnets is bad for them, as are stray magnetic fields. A good magnet will stay magnetic for years. Pretend you want to buy a magnet and do a web search.

I don't understand the diagram.
 
  • #3


I would first like to clarify that the concept of a "perfect" or "ideal" situation is not realistic in the physical world. There will always be external factors that can affect the behavior and properties of magnets. With that being said, I will provide a general response to the questions posed.

1) The duration of time that two permanent magnets can maintain their magnetic properties while in a repelling magnetic field will vary depending on several factors such as the strength of the magnets, the distance between them, and the presence of any external forces. In an ideal situation, where there are no external forces and the magnets are perfectly aligned, the magnets can potentially maintain their magnetic properties indefinitely. However, in reality, the magnetic strength of the magnets may slowly decrease over time due to factors such as temperature changes and external vibrations.

2) Again, the longevity of the magnets in this scenario will depend on the strength of the magnets and the distance between them. In an ideal situation, the magnets can potentially maintain their properties for a long time. However, in reality, the magnets may gradually lose their magnetic strength over time due to external factors.

It is important to note that the magnetic properties of permanent magnets are not permanent and can weaken over time. This is known as demagnetization. Factors such as temperature changes, exposure to strong magnetic fields, and physical impact can all contribute to the demagnetization of permanent magnets. Therefore, it is difficult to give a specific timeframe for how long these magnets will last in a repelling magnetic field without losing their properties. It is important to handle and store magnets properly to ensure their longevity.
 

1. How do magnets work?

Magnets work by creating a magnetic field, which is a force that pulls objects made of certain materials, such as iron or steel, towards the magnet. This is due to the alignment of the electrons in the atoms of these materials.

2. What is the difference between a permanent magnet and an electromagnet?

A permanent magnet is made of a material that is always magnetized, while an electromagnet is only magnetic when an electrical current is flowing through it. This is because the electrical current creates a magnetic field, but when the current is turned off, the magnetism disappears.

3. Can magnets lose their magnetism?

Yes, magnets can lose their magnetism over time. This process is called demagnetization and can occur due to exposure to high temperatures or magnetic fields in the opposite direction. However, some materials, such as neodymium, are more resistant to demagnetization than others.

4. How are magnets used in everyday life?

Magnets have many uses in everyday life, such as in speakers, motors, and generators. They are also used in credit cards, computer hard drives, and MRI machines. Magnets are also commonly used in industries such as manufacturing, transportation, and energy production.

5. Can magnets attract or repel each other?

Yes, magnets can both attract and repel each other. This is due to the polarity of the magnets - opposite poles will attract each other, while like poles will repel. This is why you can feel a force when trying to push two magnets together with the same poles facing each other.

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