How to induce current on a static conducting material?

AI Thread Summary
Inducing current in a static conducting material requires a change in magnetic flux, which can be achieved by moving magnets or the conductor itself. The discussion emphasizes that both magnets can be moved or the conductor can be rotated within a magnetic field to create the necessary flux change. Participants suggest using equations related to magnetic flux and angular frequency to calculate the induced voltage. Additionally, there is interest in creating a magnetic field with variable strength, although specific methods for this are not detailed. Understanding electromagnetic induction principles is crucial for effectively inducing current in the material.
Jay_zero
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Dear Physicists,

I am currently thinking of a way of inducing a current in a conducting material by a magnetic field. I am not good at magnetism and electricity at all, but I think it should look like the picture below. By the way, the material in the middle does not move.

Physicforum.jpg


Does anyone think that this setup will help induce a current in the material? if not how should I do it. By the way, is it possible to change the strength of the magnets at all? Please guide me in the correct direction as I am very lost here and don't know where to look. Suggestions are much appreciated on what field to look at. Thank you everyone.
 
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You need a change in magnetic flux to induce current . So you will have to move those magnets some how . What is your purpose for inducing current .
 
cragar said:
You need a change in magnetic flux to induce current . So you will have to move those magnets some how . What is your purpose for inducing current .

It is not used to power up anything electrical at all. However, I think it is silly to say that I don't even know if I really need a current in the material at all. Anyway, so I need to move the magnets? like left to right and back again? Do I have to move both magnets or one magnet? However, are there any equations to calculate how much magnetic strength I need for a given distance? And last question, how to create a magnetic field with variable strength?

Thanks again.
 
Watch the first 20 minutes of this video and he talks about electromagnetic induction and it might help you and it is a very good video.

Or you can move the conductor through the B field to induce current , Maybe you could have it rotating or something.
And if you have it rotating and you know the angular frequency, And you know the field strength , then you can calculate the magnetic flux as a function of time .
Using Flux=Acos(bt) where a is the cross-sectional area and b is the angular frequency
and the time derivative of this will be voltage .
 
Last edited by a moderator:
Thread 'Motional EMF in Faraday disc, co-rotating magnet axial mean flux'

Thread 'Motional EMF in Faraday disc, co-rotating magnet axial mean flux'

So here is the motional EMF formula. Now I understand the standard Faraday paradox that an axis symmetric field source (like a speaker motor ring magnet) has a magnetic field that is frame invariant under rotation around axis of symmetry. The field is static whether you rotate the magnet or not. So far so good. What puzzles me is this , there is a term average magnetic flux or "azimuthal mean" , this term describes the average magnetic field through the area swept by the rotating Faraday...
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