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Hard in this sense means materials that are themselves not easily magnetised. In fact, the part that you are referring to isn't really the magnet - it is the core, the magnetic field is produced by the coil, the core just concentrates the field. In an electro-magnet, the core must retain little or no field when the coils are not excited/energised. This means that items picked-up/attracted by the electro-magnet are no longer attracted when the coil is denergised - you can unload/drop the load from your crane or hoist by switching off the electro-magnet.
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Why is steel not used to make electro magnets?
steel is note for an elecromagnet because once it turned magnetic it stays magnetic
Do Hard magnetic materials make excellent permanent magnets?
Yes - in magentic terms, "hardness" = "permanence".
Can we make magnet without using magnetic material?
Yes. Electromagnets don't require a magnetic material; they just require a conductor and an electric current.
What is special about the metal Craig Wire sells?
Craig Wire sells wire and magnetic wire that can be used to make electromagnets. It is special because only certain types of wire are suitable for making electromagnets.
What materials do you need to make magnetic cereal?
Cereal is a plant product and therefore it is non magnetic and can not be made to be magnetic.
What materials are used to make the hard drive?
Typically, a very fine iron oxide coating is put on the surface of disks, but it can be just about any medium that will maintain a magnetic field.
Does a washing machine make use of an electromagnet?
I'm pretty sure. Unlike a standard magnet, which possesses a constant magnetic field, electromagnets only posses a magnet field when electrical currents pass through them. Therefore when the washing machine is on it uses electromagnets.
How are electromagnets used by an eye surgeon?
Electro-magnets have been used in hospitals to remove particles of metal (those which are magnetic- because not all common metals are magnetic, e.g. aluminium, copper, brass, gold, silver), which may have lodged in people's eyes after an accident. MRI machines that use electromagnets are used in hospitals
How do you make a hot wheel car run on electricity without a motor?
A magnetic rail system; a series of electromagnets set up to propel the car along a track. Complicated to build as it would require a controller to move the magnetic field down the track.
Why do electromagnets make iron magnetic?
The electromagnet causes many randomly oriented magnetic areas in the piece of iron to all align in the same orientation. In some cases adjacent magnetic areas not only align in the same orientation, but they merge into common large areas making it harder for the areas to randomize again.
What materials are used to make a tamagotchi?
hard plasti
What is the steps of making magnetic materials to non magnetic materials?
A magnetic material will become non-magnetic if the temperature is increased beyond its magnetic transition temperature. For example, iron will be non-magnetic if its temperature exceeds about 1050 kelvin. Transition temperatures for different magnetic materials vary over a wide range. The element Gadolinium has a transition temperature near room temperature. Many other materials must be cooled to close to absolute zero in order to be magnetic.Another way to make a magnetic material non-magnetic, which may be possible for some materials, is to add an appropriate quantity of impurities. For example most stainless steels are non-magnetic even though they are mostly iron.It is also important to recognize the difference between magnetic materials and magnetized materials. Magnetic materials can be demagnetized, so they do not act like magnets, even below their transition temperature. They are still magnetic, but the magnetic regions within the material, called "domains," have been randomized in direction. When the material is magnetized, those internal fields tend to line up and combine their strength. Magnetizing and demagnetizing is often confused with magnetic and non-magnetic transitions, however the two phenomena are quite different in nature.
