Why Does a Metal Ring Heat Up in a Changing Magnetic Field?

AI Thread Summary
A metal ring heats up in a changing magnetic field due to the induction of an electromotive force (emf) within the ring, as described by Faraday's law. This induced emf generates electric fields that cause currents to flow through the conductor, resulting in resistive heating. The discussion highlights the confusion around the concepts of changing magnetic flux and its effects on conductors. Understanding the relationship between magnetic fields and induced electric fields is crucial to grasping why the ring becomes hot. Overall, the phenomenon illustrates the principles of electromagnetic induction and its practical implications.
a1densmom
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If you place a metal ring in a region in where a magnetic field is rapidly alternating, the ring may become hot to your touch. Why?


Is it because a changing magnetic field can create electric fields? I AM SO CONFUSED...and it seems so simple?!?
 
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Well, I wouldn't call it simple.
You have a few more steps to explain why it gets hot.
Any other remarks?
 
can you give me a hint?
 
What does deflecting mean?
 
Last edited:
a1densmom said:
What does deflecing mean?
I don't know, why?
Hint: what will an electric field do inside of the conductor?
 
I thought that it might have something to do with it... I was lost.

Is it because the voltage is increased? I don't know... I am trying. Thank you for helping me.
 
A changing magnetic flux, here you can think of it as just a changing magnetic field, induces an emf in the ring. What will happen in the ring with this induced emf acting?
(Faraday's/Lenz's law is a bit confusing) ; )
 
Okay... I got it, I think... Thank you so much. Sorry if I annoyed you.
 

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