How would you use a magnet to test whether or not a piece of metal was magnetic?

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Discussion Overview

The discussion revolves around methods to test whether a piece of metal is magnetic, exploring both simple and more precise techniques. Participants consider the properties of various materials in relation to magnetism and the conditions under which they can be tested.

Discussion Character

  • Exploratory, Technical explanation, Conceptual clarification

Main Points Raised

  • Some participants suggest that simply placing a magnet next to the metal can determine if it is magnetic.
  • Others argue that all materials exhibit some form of magnetism, but the degree varies, and some may require advanced tools for accurate measurement.
  • One participant describes how magnets interact with other magnets, noting that orientation affects attraction and repulsion, while unmagnetized iron will always be attracted.
  • Another participant mentions that certain materials, like bismuth and specific graphite grades, can repel magnets, introducing the concept of diamagnetism and its applications.
  • A suggestion is made to use a styrofoam boat in water to test the magnetic properties of a material with more precision.

Areas of Agreement / Disagreement

Participants generally agree on the basic principle that magnets can test for magnetism, but there are multiple competing views on the nuances of magnetic properties and testing methods. The discussion remains unresolved regarding the best approach to determine magnetism in various materials.

Contextual Notes

Some limitations include the need for powerful measuring tools for certain materials and the variability in magnetic responses among different substances. The discussion does not resolve the complexities of these factors.

EskShift
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just wondering if its a sneaky answer or just as simple as put a magnet next to it?
 
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Of course, objects that respond in a magnetic field are magnetic. Those that aren't are non-magnetic. Actually, ALL materials are magnetic but some are more magnetic than others.EDIT: For many materials, you may need powerful measuring tools to determine, with accuracy, how magnetic an object is.
 
If you put a magnet near another magnet, try turning them around various ways, and you can find an orientation where they will attract and an orientation where they will repel. But if you put a magnet near an unmagnetized piece of iron, it will attract regardless of orientation.
 
Pinu7 said:
Of course, objects that respond in a magnetic field are magnetic. Those that aren't are non-magnetic. Actually, ALL materials are magnetic but some are more magnetic than others.


EDIT: For many materials, you may need powerful measuring tools to determine, with accuracy, how magnetic an object is.

Some materials repel, like bismuth and certain grades of graphite. In fact diamagnetism let's you make a passive levitator! (with a little help from an external magnet).

OP - if you want more precision, place the material on a little boat made of styrofoam floating in a bowl of water and then see what happens when you bring a magnet near.
 

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