Magnetic field value assigned to a magnet meaning

In summary, the conversation discusses the meaning of a magnet with a value of 10 Tesla, with one person questioning if this value refers to the magnetic field directly on the poles. The other person clarifies that a proper magnet description should specify where the field is measured and that 10 Tesla is a strong field strength. They also mention that for an electromagnet without a core, defining poles as points in space can be problematic. Additionally, they explain that data sheets often specify the maximum induction present within the magnetic material itself and that there are no permanent magnets with magnetic fields of 10 Tesla.
  • #1
anorred
59
0
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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  • #2
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.
 
  • #3
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?
 
  • #4
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
 
  • #5
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.
 
  • #6
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.
 
  • #7
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.
 

1. What does the magnetic field value assigned to a magnet mean?

The magnetic field value assigned to a magnet is a quantitative measure of the strength of the magnetic field that the magnet produces. It is typically measured in units of tesla or gauss and indicates the intensity of the magnetic force at a specific point in space.

2. How is the magnetic field value of a magnet determined?

The magnetic field value of a magnet is determined by measuring the force exerted by the magnet on a test object, such as a compass needle, at a specific distance from the magnet. This allows scientists to calculate the strength of the magnetic field at that point in space.

3. Can the magnetic field value of a magnet change?

Yes, the magnetic field value of a magnet can change depending on various factors such as temperature, mechanical stress, and exposure to other magnetic fields. This change in magnetic field strength is known as magnetic hysteresis and can be measured using specialized equipment.

4. What is the significance of a high or low magnetic field value for a magnet?

A high magnetic field value for a magnet indicates a stronger magnetic field, which can be useful for applications such as magnetic levitation or data storage. A low magnetic field value may indicate a weaker magnet or one that is not as well suited for certain applications.

5. How does the magnetic field value of a magnet affect its magnetic properties?

The magnetic field value of a magnet is directly related to its magnetic properties, such as the magnetic dipole moment and the magnetic field lines it produces. A stronger magnetic field value corresponds to a higher magnetic dipole moment and a more concentrated magnetic field around the magnet.

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