Question about a conducting sphere in a varying magnetic field

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Homework Help Overview

The discussion revolves around a spherical conducting shell placed in a time-varying magnetic field, specifically questioning whether an induced current exists along the equator of the shell.

Discussion Character

  • Exploratory, Assumption checking

Approaches and Questions Raised

  • Participants express uncertainty about the presence of induced currents, questioning the relationship between a changing magnetic field and the expected eddy currents. Some suggest exploring concepts like magnetic shielding to deepen understanding.

Discussion Status

Participants are engaging with the problem by considering the implications of magnetic shielding and the behavior of currents in response to external magnetic fields. There is an ongoing exploration of ideas without a clear consensus on the presence of induced currents.

Contextual Notes

There is a focus on understanding the effects of a time-varying magnetic field on a conducting shell, with references to concepts that may influence the interpretation of the problem.

Clara Chung
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Homework Statement


3. A spherical conducting shell is placed in a time-varying magnetic field. Is there an induced current along the equator?

Homework Equations

The Attempt at a Solution


I don't know what is the right answer. I mean...why not? Is the magnetic field is changing, there should be eddy current around the equation.. I don't see why won't there be an induced current along the equator..
 
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Clara Chung said:

Homework Statement


3. A spherical conducting shell is placed in a time-varying magnetic field. Is there an induced current along the equator?

Homework Equations

The Attempt at a Solution


I don't know what is the right answer. I mean...why not? Is the magnetic field is changing, there should be eddy current around the equation.. I don't see why won't there be an induced current along the equator..
I believe you are on the right track, but you might be able to offer a better explanation.

I suggest doing a slight bit of research on magnetic shielding (or electromagnetic shielding). Given that this sort of shielding exists, what does that imply about the currents within a conducting shell in the presence of a changing, external magnetic field?
 
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collinsmark said:
I believe you are on the right track, but you might be able to offer a better explanation.

I suggest doing a slight bit of research on magnetic shielding (or electromagnetic shielding). Given that this sort of shielding exists, what does that imply about the currents within a conducting shell in the presence of a changing, external magnetic field?
The currents will produce a magnetic field to oppose the change in magnetic field?
 
Clara Chung said:
The currents will produce a magnetic field to oppose the change in magnetic field?
Yes, that pretty much sums it up in my opinion. :smile:
 
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