What are the SI units for measuring magnetic fields?

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Discussion Overview

The discussion revolves around the SI units for measuring magnetic fields, specifically focusing on the definitions and distinctions between webers and teslas. Participants explore the concepts of magnetic induction, magnetic flux, and related units such as henries.

Discussion Character

  • Technical explanation
  • Conceptual clarification
  • Debate/contested

Main Points Raised

  • Some participants propose that teslas measure the strength of a magnetic field, while others clarify that teslas are specifically the SI unit for magnetic induction.
  • Webers are discussed as the unit for magnetic flux, with some participants noting the relationship between webers and teslas.
  • There is mention of the intensity of the magnetic field (H) being measured in A/m, and the relationship between B and H in empty space.
  • Some participants assert that webers can be defined for both constant and variable magnetic fields, countering earlier claims about them measuring a rate of change.
  • Several participants express uncertainty or seek clarification on the definitions and relationships between these units.

Areas of Agreement / Disagreement

Participants exhibit a mix of agreement and disagreement regarding the definitions and relationships of the units, with some clarifications made but no consensus reached on all points.

Contextual Notes

Some statements rely on specific interpretations of magnetic field concepts, and there are unresolved distinctions regarding the definitions of magnetic flux and induction.

Bashyboy
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Hi, I was curious as to what webers and teslas measure. As I read up on them I was able to speculate that teslas measured a magnetic fields dimensions and webers measured a magnetic fields strength; obviously though, this is a mere speculation: so please correct me if I am mistaken.

Thank you
 
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Tesla is the SI unit for magnetic induction. Weber is for magnetic flux.
 
Tesla is the unit of magnetic field too if I remember correctly.
 
Tesla is a measure of the strength of a magnetic field.

Webers are T/s, or a rate of change of the magnetic field.

Henry is a measure of inductance, which is ohm seconds.
 
iRaid said:
Tesla is the unit of magnetic field too if I remember correctly.
This is a term used sometimes, in a loose manner, when everybody knows what they are talking about and there is no confusion. The proper name is induction of the field, B and is measured in Tesla. The intensity of the magnetic field (H) is measured in A/m.
So the magnetic field can be measured by two quantities and in empty space B is just proportional to H.
 
Last edited:
khemist said:
Tesla is a measure of the strength of a magnetic field.

Webers are T/s, or a rate of change of the magnetic field.

Henry is a measure of inductance, which is ohm seconds.

Indeed Tesla is the unit for the induction of the field which is a meausre of "strength".

1 Wb = 1T*1m^2.
It measures magnetic flux and not the rate of change of magnetic field. The flux can be defined for both constant and variable fields.
 
nasu said:
Indeed Tesla is the unit for the induction of the field which is a meausre of "strength".

1 Wb = 1T*1m^2.
It measures magnetic flux and not the rate of change of magnetic field. The flux can be defined for both constant and variable fields.

Oh yes I was mistaken. Thanks for the correction.
 
Thank you all for your input, appreciate it.
 

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