Does the magnetic field produced by a magnet act on itself?

AI Thread Summary
The discussion centers on the interaction between a conductor and the magnetic field it generates when placed in a moving magnetic field. The induced current in the conductor creates its own magnetic field, which indeed acts on different parts of the conductor, potentially altering its shape. This phenomenon is exemplified by eddy-current brakes, where the induced magnetic field opposes the motion of a magnet. Additionally, when a bar magnet is dropped through a conducting ring, current is induced regardless of the magnet's position, due to variations in magnetic field strength. Overall, the interplay between magnetic fields and induced currents is crucial in understanding electromagnetic interactions.
Poopypoop123
Messages
3
Reaction score
0
So when a conductor in complete circuit is placed next to a moving magnetic field, current in the conductor is induced and the induced current again produces its own magnetic field. So does this new magnetic field act on the conductor? It's the same as the question in the title. Is my concept wrong? I'm really confused.
Thanks a lot for the help!
 
Physics news on Phys.org
Yes. Or, more precisely, the magnetic field from one part of the conductor will act on other parts of the conductor. If you have a conductor loop made out of a very flexible material and power it, it will try to reach a circular shape due to this interaction.

The backreaction from the coil's magnetic field to the conductor that you discuss is also present, and it is the idea behind eddy-current brakes for example: A moving magnet induces currents, those currents induce a magnetic field that slows down the magnet.
 
OK thanks.
 
One more question. When a bar magnet is dropped through a conducting ring,current is induced. Is there current induced when the ring is perfecting in the middle of the bar magnet? And why?
 
No matter how you place it, you'll always have places where the magnetic field strength changes, which induces a current.
 
Thread 'Inducing EMF Through a Coil: Understanding Flux'

Thread 'Inducing EMF Through a Coil: Understanding Flux'

Thank you for reading my post. I can understand why a change in magnetic flux through a conducting surface would induce an emf, but how does this work when inducing an emf through a coil? How does the flux through the empty space between the wires have an effect on the electrons in the wire itself? In the image below is a coil with a magnetic field going through the space between the wires but not necessarily through the wires themselves. Thank you.
View full post »
Thread 'Griffith, Electrodynamics, 4th Edition, Example 4.8. (Second part)'

Thread 'Griffith, Electrodynamics, 4th Edition, Example 4.8. (Second part)'

I am reading the Griffith, Electrodynamics book, 4th edition, Example 4.8. I want to understand some issues more correctly. It's a little bit difficult to understand now. > Example 4.8. Suppose the entire region below the plane ##z=0## in Fig. 4.28 is filled with uniform linear dielectric material of susceptibility ##\chi_e##. Calculate the force on a point charge ##q## situated a distance ##d## above the origin. In the page 196, in the first paragraph, the author argues as follows ...
View full post »

Similar threads

I Induced electric fields and induced magnetic fields confusion
Replies
9
Views
3K
I Charge movement relative to magnetic field frame dependence/invariance
Replies
5
Views
954
I Hall effect -- is it always applicable?
Replies
7
Views
2K
B Force Exerted on a Conductor by a Homogeneous Magnetic Field
Replies
1
Views
1K
I Homopolar generator question: Magnetic “wake”
Replies
7
Views
3K
I Induced Electric and Magnetic Fields Creating Each Other
Replies
3
Views
2K
I Does displacement current create a magnetic field? And Lorentz force?
Replies
10
Views
2K
Qualitative explanation of Magnetic Braking
Replies
6
Views
2K
B Experiment issues (electromagnetism)
Replies
42
Views
2K
I Railgun: Significant magnetic field where projectile is?
Replies
8
Views
2K

Hot Threads

Recent Insights

Back
Top