# How scientists ensured this fundamental property of magnets?

• faheemahmed6000
In summary, the property of magnets as centers of force at the extremities is an approximation and can be measured using a magnetic field sensor. This does not apply to all magnets, as it is a specific feature of uniformly magnetized cylinders. Other types of magnets can have a different distribution of poles.
faheemahmed6000
Firstly, please note that I am talking about the period BEFORE electricity and magnetism were unified. So I am NOT seeking for answers based on Ampere atomic current model of magnets.

I have read the following statement about the property of magnets at two different places. One from here:

and the other from Maxwell's treatise Vol II, Article 373:

It says that in the magnetic pole model, only the surfaces at the extremities (poles) act as centers of force and the rest of the magnet appears free from magnetic action.

How can we ensure this? For example, why cannot we have half of the magnet's volume being north pole and the other half volume being south pole? Why do we necessarily have the surfaces at the extremities as centers of force instead of volumes (analogous to the charge model)?

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That is an approximation, you can calculate that it is usually a good approximation and you can use a magnetic field sensor (like a Hall probe) to measure it.

Imagine a solenoid as long chain of NS magnets in a row, partially overlapping: N S/N S/N S/N S where "X/Y" means both are at the same place. The net result is N ... S.

faheemahmed6000 said:
For example, why cannot we have half of the magnet's volume being north pole and the other half volume being south pole?
You certainly can. This is not a “fundamental property of magnets” in general, but a feature of a specific type of magnet: a uniformly magnetized cylinder. If you have a non-uniformly magnetized cylinder or a uniformly magnetized non-cylinder you can change that.

## 1. How do scientists determine the fundamental properties of magnets?

Scientists use a variety of methods and tools, such as magnetic field sensors and microscopes, to study the behavior of magnets and determine their fundamental properties.

## 2. What are the fundamental properties of magnets?

The fundamental properties of magnets include magnetic fields, polarity, and the ability to attract or repel other magnets or magnetic materials.

## 3. How do scientists ensure the accuracy of their measurements of magnet properties?

Scientists use standardized measurement techniques and conduct multiple trials to ensure the accuracy and reliability of their measurements of magnet properties.

## 4. What role do experiments play in understanding the fundamental properties of magnets?

Experiments are crucial in understanding the fundamental properties of magnets as they allow scientists to observe and test the behavior of magnets under different conditions.

## 5. How have advancements in technology helped scientists in studying magnet properties?

Advancements in technology, such as stronger and more sensitive magnetic field sensors, have allowed scientists to make more precise measurements and gain a deeper understanding of the fundamental properties of magnets.

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