# Energy lost in magnetism

• suhagsindur
In summary, when two magnets are placed in a way that there is a repulsive force between them, the lines of magnetic force of both magnets are in opposite directions, leading to a loss in magnetism. This is due to thermal losses when the magnets are kept in that position for a long time, resulting in a weaker magnetic field and less potential energy between the magnets. The energy is not consumed, but rather the energy density between the neighboring poles decreases. This can also happen if a weaker magnet is placed near a stronger one.

#### suhagsindur

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?

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.

## What is energy lost in magnetism?

Energy lost in magnetism refers to the amount of energy that is dissipated or converted into heat when a magnetic material is subjected to varying magnetic fields. This energy loss is known as hysteresis loss.

## What causes energy loss in magnetism?

Energy loss in magnetism is primarily caused by the realignment of magnetic domains within a material when it is exposed to changing magnetic fields. This realignment causes friction and results in heat energy being released.

## How is energy lost in magnetism measured?

Energy lost in magnetism is typically measured using a device called a hysteresis loop tracer. This device records the amount of energy required to magnetize a material and the amount of energy released when the magnetic field is removed. The difference between these two values represents the energy lost in magnetism.

## What are the factors that affect energy loss in magnetism?

The amount of energy lost in magnetism is influenced by several factors, including the type of magnetic material, the strength and frequency of the magnetic field, and the temperature of the material. Generally, materials with higher magnetic permeability and lower coercivity will experience greater energy loss.

## Can energy loss in magnetism be reduced?

While it is not possible to completely eliminate energy loss in magnetism, it can be reduced by selecting materials with lower hysteresis coefficients, using laminated cores to reduce eddy currents, and minimizing the frequency and strength of the magnetic field. Additionally, advancements in materials science and technology continue to improve the efficiency of magnetic materials and reduce energy loss.