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

In summary, when a conductor is placed near a moving magnetic field, it induces a current which in turn produces its own magnetic field. This new magnetic field can act on other parts of the conductor, causing it to try to reach a circular shape. This interaction can also be seen in eddy-current brakes. Additionally, when a bar magnet is dropped through a conducting ring, current is induced due to the changing magnetic field strength. This occurs regardless of how the ring is positioned because there will always be areas of changing magnetic field strength.
  • #1
Poopypoop123
3
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!
 
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  • #2
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.
 
  • #3
OK thanks.
 
  • #4
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?
 
  • #5
No matter how you place it, you'll always have places where the magnetic field strength changes, which induces a current.
 

1. How does a magnet's own magnetic field affect itself?

A magnet's own magnetic field can affect itself by causing the magnet to align in a certain direction. This is known as self-induction.

2. Does the magnetic field produced by a magnet weaken over time?

Yes, the magnetic field produced by a magnet can weaken over time due to factors such as temperature changes and exposure to other magnetic fields.

3. Can a magnet's own magnetic field cause it to lose its magnetism?

No, a magnet's own magnetic field cannot cause it to lose its magnetism. However, external factors such as heat or exposure to strong magnetic fields can cause a magnet to lose its magnetism.

4. Is the magnetic field produced by a magnet always strongest at its poles?

Yes, the magnetic field produced by a magnet is typically strongest at its poles. This is where the magnetic field lines are most concentrated.

5. Can a magnet's own magnetic field affect other magnets?

Yes, a magnet's own magnetic field can affect other magnets. This is known as magnetic induction and is the basis for how many types of electronic devices work.

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