Where does the energy go in repelling magnets?

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    Energy Lost Magnetism
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Discussion Overview

The discussion centers around the question of energy dissipation in repelling magnets, particularly focusing on the potential energy changes when magnets are held in a repulsive configuration over time. Participants explore concepts related to magnetic fields, magnetism loss, and the implications of prolonged exposure of magnets in repelling orientations.

Discussion Character

  • Exploratory
  • Technical explanation
  • Debate/contested

Main Points Raised

  • One participant questions where the energy goes when magnets are held in a repelling position for an extended period, suggesting that the magnetic field weakens and potential energy decreases.
  • Another participant challenges the premise by asking why the magnetic field would get weaker in this scenario.
  • A different viewpoint suggests that an increase in the number of magnetic domains could lead to a weaker magnetic field.
  • One participant explains that the opposing magnetic forces between repelling magnets can lead to a loss in magnetism, indicating a potential misconception due to their mechanical background.
  • Another participant mentions that thermal losses could be a reason for magnets becoming weaker over time when exposed to repelling forces.
  • There is a discussion about whether physically bonding two magnets with the same poles together (N/N or S/S) would cause them to lose magnetism over time.

Areas of Agreement / Disagreement

Participants express differing views on the mechanisms behind the weakening of magnetic fields and the implications of prolonged exposure of magnets in repelling configurations. There is no consensus on the reasons for energy dissipation or the effects of bonding magnets together.

Contextual Notes

Participants reference concepts such as magnetic domains and thermal losses, but the discussion lacks clarity on the underlying assumptions and definitions related to magnetism and energy transfer.

suhagsindur
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Two magnet I put nearer to each other in such a way that there is a repulsive force between them. Both the magnets have some potential energy with respect to each other. I keep magnet in this position for a long time & so magnetic field became weaker & so magnet have less amount of potential energy w.r.t. each other. So, where does the energy gone? For which work it is consumed?
 
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Why would the magnetic field get weaker?
 
if the number of magnetic Domain go larger magnetic field will get weaker.
 
pallidin said:
Why would the magnetic field get weaker?

Hello pallidin,
If two magnet put in such a manner there is repulsion is acted between them, then lines of magnetic force of both magnet is in opposite direction, this leads lost in magnetism. That's why magnetism became weaker.
I have heard this thing before if anything is wrong in this concept please tell me. I am from mechanical background so may be electrical misconception is there.
 
suhagsindur said:
Hello pallidin,
If two magnet put in such a manner there is repulsion is acted between them, then lines of magnetic force of both magnet is in opposite direction, this leads lost in magnetism. That's why magnetism became weaker.
I have heard this thing before if anything is wrong in this concept please tell me. I am from mechanical background so may be electrical misconception is there.

So, is this saying that duct taping(or epoxy) two magnets together with N/N or S/S for a couple days, a week or a year will cause the two magnets to lose or reduce their magnetism?
 
suhagsindur said:
Hello pallidin,
If two magnet put in such a manner there is repulsion is acted between them, then lines of magnetic force of both magnet is in opposite direction, this leads lost in magnetism. That's why magnetism became weaker.
I have heard this thing before if anything is wrong in this concept please tell me. I am from mechanical background so may be electrical misconception is there.

If you mean to ask why magnets become weaker after a long exposure, it's usually due to thermal losses.
If you mean to ask about induced magnetism, consider the situation where the first magnet is small & the other is very strong. Even if the magnetic domains of the first magnet are to 'flip' over adiabatically, no energy is lost. It's just the energy density between the neighbouring poles of the magnets that decreases.
 
pallidin said:
So, is this saying that duct taping(or epoxy) two magnets together with N/N or S/S for a couple days, a week or a year will cause the two magnets to lose or reduce their magnetism?

Yes, the same thing which I want to tell you.
 

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