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Because pure iron can gain or lose a magnetic field very quickly.
A hard magnet (certain steels) will hold its field indefinitely (unless heated to too high a temp).
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∙ 12y ago
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Is a soil magnetic material or a non magnetic material?
it generally depends on the soil content~if it is rich in iron or some other magnetic metals it will magnetize but if it don't it won't..soil is non-magnetic but iron filings in it are magnetic
Is iron magnetic?
Yes, iron is a magnetic material. It is an element by itself by alloys containing iron would also exhibit varying degrees of magnetism. The other magnetic elements include cobalt and nickel.
How can a magnet attract a piece of iron that is not magnet?
Iron is a magnetic material, it conducts metal.
Why is soft iron used for the core of an electromagent?
The main advantage of an electromagnet is it can be turned on and off. Iron is a soft magnetic material an therefore looses its magnetism very quickly, if you use a metal like like steel it will not loose it magnetism very easily and even if you turn off the current it will remain a magnet.
Why does hard iron retain magnetism?
Coercivity is the property describing the ability of magnetic material to retain magnetism. Compared to soft iron, hard iron has larger magnetic domains, regions of the crystal where atomic magnetic fields have similar orientation. Materials with fewer, bigger domains within a given volume have higher coercivity than materials with many small domains. Hard iron can still lose its magnetism, as all permanent magnets can be demagnitized if strong enough fields are involved. Soft iron loses magnetism simply by removing it from a magnetic field. Some "rare earth" metal alloys can retain magnetism much better than hard iron, since they can have much larger domains.
Why does the soft iron core increases the strength of magnetic field?
Iron core (usually soft iron core) is a highly ferromagnetic material. Ferromagnetic materials allows (and attracts) the magnetic field lines to pass through it. When such a material is used in the electromagnet, the magnetic field lines passing through it increases, thereby, the strength of the electromagnet increases. So my friend, I hope you are satisfied with the answer.
Is a soil magnetic material or a non magnetic material?
it generally depends on the soil content~if it is rich in iron or some other magnetic metals it will magnetize but if it don't it won't..soil is non-magnetic but iron filings in it are magnetic
What makes a material magnetic?
It's not the material it's whats in iron and cobalt makes materials magnetic
What object that attracts iron?
none of them. iron can be magnetised but the material itself is not magnetic
Why is it important to use a soft magnetic material as the core of a solenoid?
Soft iron is having very low hysteresis loss. So it would be good to use it as core.
Do electrons have the same magnetic behavior as particles of iron?
Electrons are the reason any material is magnetic or not. including iron.
If a soft iron core is Inserted into a solenoid will the strength of magnetic field produced by it change?
It has been found that if a soft iron rod called core is placed inside a solenoid, then the strength of the magnetic field becomes very large because the iron core is magnetized by induction The core of the electromagnet must be of soft iron because soft iron loses all of its magnetism when current in the coil is switched off or stopped
What of the metals are magnetic material?
Iron, nickel, cobalt.
What was the first magnetic material discovered?
Lodestone or magnetite, a naturally magnetic iron ore.
What is the role of the soft iron core?
In a moving coil galvanometer, soft iron core intensifies the magnetic field through it. this causes maximum number of magnetic field lines to pass through the coil.
What is a magnet and which a magnetic material?
Magnetic materials are all made of iron. They carry electromagnetic waves.
If you have two iron poles how can you tell which is magnetic?
You can bring another magnetic material (e.g., iron) close to each of them, and see to which one it reacts.
