Magnetic field value assigned to a magnet meaning

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Discussion Overview

The discussion revolves around the interpretation of the magnetic field value assigned to a magnet, specifically the meaning of a value like 10 Tesla. Participants explore the implications of this value in terms of measurement location, the nature of the magnet (permanent vs. electromagnet), and the characteristics of magnetic poles.

Discussion Character

  • Debate/contested
  • Technical explanation
  • Conceptual clarification

Main Points Raised

  • Some participants question whether a value of 10 Tesla refers to the magnetic field strength directly at the poles of the magnet.
  • Others argue that a proper description of a magnet should specify where the field is measured, suggesting that 10 Tesla may represent a maximal field value rather than a consistent value at all points.
  • It is noted that 10 Tesla is a strong magnetic flux density, but the exact nature of the magnet (permanent or electromagnet) affects the interpretation of this value.
  • Some participants assert that there are no permanent magnets capable of producing a magnetic field of 10 Tesla, implying that such values are typically associated with electromagnets.
  • There is a challenge to define magnetic poles in the context of an electromagnet without a core, indicating a complexity in understanding magnetic field distribution.

Areas of Agreement / Disagreement

Participants express disagreement regarding the nature of the magnet in question (permanent vs. electromagnet) and the implications of the 10 Tesla value. There is no consensus on whether the value applies uniformly at the poles or if it represents a maximum field strength elsewhere.

Contextual Notes

Limitations include the lack of clarity on the specific type of magnet being discussed and the absence of defined measurement locations for the magnetic field strength. The discussion also highlights the complexity of defining magnetic poles in certain contexts.

anorred
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When a magnet has a value of.. let's say 10 Tesla, what does this mean exactly? Does this mean the magnetic field value directly on the poles has a value of 10 Tesla?
 
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A proper magnet description should specify where the field is measured. 10 Tesla looks like the (maximal?) field value somewhere - it is an electromagnet, so it does not have poles.
 
mfb said:
A proper magnet description should specify where the field is measured. 10 Tesla looks like the (maximal?) field value somewhere - it is an electromagnet, so it does not have poles.

What do you mean it doesn't have poles?
 
Tesla is a unit of magnetic flux density (B) i.e the number of 'lines per square metre' and so the position should be given.
10T is a very strong (large magnetic flux density) field strength
 
Drakkith said:
What do you mean it doesn't have poles?
Try to define poles as points in space for an electromagnet without a core, and you will see the problem.
 
anorred said:
When a magnet has a value of.. let's say 10 Tesla, what does this mean exactly? Does this mean the magnetic field value directly on the poles has a value of 10 Tesla?
Data sheets often specify the maximum induction present within the magnetic material itself. If that is the case for your magnet, then values at the poles will generally be lower.

mfb said:
A proper magnet description should specify where the field is measured. 10 Tesla looks like the (maximal?) field value somewhere - it is an electromagnet, so it does not have poles.
The question incolves a magnet (which I take to be permanent), and does not specify an electromagnet.
 
There are no permanent magnets with magnetic fields of 10 Tesla.
If you check my two previous posts, I made clear that, and why, they refer to electromagnets.
 

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