Is diamagnetism only present with varying magnetic fields?

[jaumzaum]

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?

 

[jaumzaum]

When I said electric field I meant magnetic field.

Sorry about that!
Thannks

 

[Meir Achuz]

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.

 

[jaumzaum]

I meant Faraday law, sorry.
It was early in the morning