Is diamagnetism only present with varying magnetic fields?

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Discussion Overview

The discussion revolves around the nature of diamagnetism and whether it is exclusively associated with varying magnetic fields. Participants explore the relationship between diamagnetism and electromagnetic laws, particularly focusing on Ampere's law and Faraday's law.

Discussion Character

  • Debate/contested, Conceptual clarification

Main Points Raised

  • One participant questions if diamagnetic materials only repel varying magnetic fields, referencing Ampere's law as a basis for their understanding.
  • Another participant clarifies that their initial reference to "electric field" was intended to mean "magnetic field."
  • A different participant introduces Lenz's law as a cause of diamagnetism, suggesting that both constant and varying magnetic fields can induce a response in diamagnetic materials.
  • There is a correction regarding the reference to Ampere's law, with a participant acknowledging they meant to refer to Faraday's law instead.

Areas of Agreement / Disagreement

Participants express differing views on the laws governing diamagnetism, with no consensus reached on whether it is solely linked to varying magnetic fields or if constant fields also play a role.

Contextual Notes

Participants demonstrate some confusion regarding the relevant electromagnetic laws, indicating a need for clarity on definitions and principles related to diamagnetism.

jaumzaum
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Hello. I was wondering if diamagnetic materials only repel varying electric field? By Ampere law only a variable flux can cause an electromotive force, so, and by what I understood diamagnetism is explained exclusively by Ampere law. Am I wrong?
 
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When I said electric field I meant magnetic field.

Sorry about that!
Thannks
 
I don't know what you mean by "Ampere law"?
Diamagnetism is caused by Lenz's law. In classical terms, if a magnetic field (constant or varying) is applied to a current loop, the loop tends to rotate in a direction so that its magnetic field acts against the applied magnetic field. This produces magnetism (M) in the direction opposite to the applied magnetic field.
 
I meant Faraday law, sorry.
It was early in the morning
 

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