Can Magnetic Fields Heat Metal & Create Eddy Currents?

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Discussion Overview

The discussion revolves around the effects of magnetic fields on metal, specifically focusing on whether magnetic fields can heat metal and create eddy currents. Participants explore various scenarios involving magnetic fields, rotating metal disks, and straight wires in motion, raising questions about induced currents and the principles behind these phenomena.

Discussion Character

  • Exploratory
  • Technical explanation
  • Conceptual clarification
  • Debate/contested

Main Points Raised

  • One participant questions whether a square piece of metal placed in a variable magnetic field would heat up and if this relates to the concept of induced current.
  • Another participant inquires about a rotating metal disk in a constant magnetic field, asking whether it would stop rotating and how eddy currents are induced if the area, magnetic field, and angle remain unchanged.
  • A further question is posed regarding a straight wire moving with velocity in a uniform magnetic field, asking if a potential difference would be induced despite no changes in area, magnetic field, or angle.
  • Another participant seeks clarification on the concept of eddy currents and how they differ from induced currents.

Areas of Agreement / Disagreement

The discussion remains unresolved, with multiple competing views and questions raised regarding the principles of magnetic fields, eddy currents, and induced currents. Participants express uncertainty and seek further clarification.

Contextual Notes

Participants have not provided definitions for key terms such as "eddy current" and "induced current," leading to potential misunderstandings. The discussion lacks resolution on the conditions under which these phenomena occur.

brainyman89
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let's say we have a square piece of metal and we put this piece in a variable magnetic field, would it get heated? is this the idea of a current?

If we have a rotating metal disk (as the case of a saw for instance), and the we put this rotating disk in a constant uniform magnetic field such that angle between normal vector and B vector is 0 and is not changing since the disk is rotating along the normal axis, would this disk stop rotating? if yes how comes eddy current are induced though we are not changing any of these area, B nor the angle? if no then what is the idea of creating brakes by eddy currents?

if we have a short piece of straight rectilinear wire in motion with velocity V in a uniform constant magnetic field, would we have a potential difference(voltage) on the edges of this wire? if yes how comes we got induced emf without changing any of these area, B nor the angle?

thanks in advance
 
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anybody?
 
what is the idea of eddy current and how does it differ than the induced current?
 
can anybody help?
 

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