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

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Homework Help Overview

The discussion revolves around the phenomenon of a metal ring heating up when placed in a changing magnetic field, exploring the underlying principles of electromagnetism.

Discussion Character

  • Exploratory, Conceptual clarification, Assumption checking

Approaches and Questions Raised

  • Participants discuss the relationship between changing magnetic fields and induced electric fields, with some expressing confusion about the concepts involved. Questions about the implications of induced emf and its effects on the metal ring are raised.

Discussion Status

The conversation includes attempts to clarify the concepts of induced emf and its role in heating the metal ring. Some participants express uncertainty and seek hints, while others provide insights into the principles at play, indicating a productive exchange of ideas.

Contextual Notes

Participants are navigating through the complexities of Faraday's and Lenz's laws, with varying levels of understanding and terminology, which may affect their interpretations of the problem.

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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