Reverse Magnetism in Bar Magnet: Physics Theory Explained

Thread starter WarFace
Start date Apr 25, 2009
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Physics Theory

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A strong external magnetic field can reverse the magnetism in a bar magnet due to the alignment of magnetic domains within the material. When exposed to the external field, the domains, which are normally randomly oriented, can realign in the direction of the applied field. This realignment occurs because the energy from the external field overcomes the internal magnetic interactions that maintain the original orientation of the domains. As a result, the bar magnet can lose its original magnetization and adopt a new magnetic direction. Understanding this process is crucial for applications in magnetism and materials science.

Apr 25, 2009

WarFace

Explain, using the domain theory, why a strong external magnetic field can reverse the magnetism in a bar magnet.

If anyone can provide me a source for this question or would like to answer it, it would be much appreciated.

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Apr 25, 2009

Mapes

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Hi WarFace, welcome to PF. One online reference is the Wikipedia article http://en.wikipedia.org/wiki/Magnetic_domains" . Have you read it?

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