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Why should the material used for making permanent magnets have high coercivity?
Wiki User
∙ 11y ago
The material should have
high retentivity so that the magnet is strong and high coercivity
so that the magnetisation is not erased by stray magnetic fields
Wiki User
∙ 11y ago
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Why soft iron is used for making a permanent magnet?
h
How do ring magnets 'float'?
The magnet is placed over a super conducting material. Because super conductors conduct electricity with zero resistance, it repels the magnet making it float. The super conductor is usually a piece of YBa2Cu3O7 cooled to below 92 degrees kelvin. At this temperature, the substance changes state from a solid to a bose-einstein condensate and is a super conductor.
What is the stroke method making magnets?
The stroking method makes all of the atoms in the magnetic object point in one direction, causing a magnetic field.
Which rock is used to make glass?
There could be several rocks used in the making of glass, but the main constituent material used in making glass is quartz. The rock which is used most for supplying the quartz used in glass making is sandstone.
Why is marble an important type of metamorphic rock?
It is non-foliated, that is, it does not have a texture of sheet like layers or banding of mineral layers, making a very strong building material.
Which magnetic material can retain permanent magnetization?
False permanent magnets can but electromagnets need a running current A+
What is a method of making permanent magnets?
Permanent magnets can be made by :- 1. Applying elecric field to the magnet put in between the coils of solenoid. 2. By putting magnets on the tracks of trains.
What type of steel is best suited for making permanent magnets?
tungsten
Can magnets be used for making fridge?
no becuse they are not the right material
Which can not be used for making permanent magnets?
Aluminum, Brass, Lead, Plastic or Paper because those materials are non-magnetic!
Is cerium hard?
Cerium is a chemical element with an atomic number of 58 and the symbol Ce. Cerium alloys are used in permanent magnets, thus making it magnetic.
Which temperature of Magnets affects the magnets strength?
cold temperature affects the magnets strength by making it stronger
What is the difference between hard and soft material?
Materials which retain their magnetism and are difficult to demagnetize are called hard magnetic materials. These materials retain their magnetism even after the removal of the applied magnetic field. Hence these materials are used for making permanent magnets. In permanent magnets the movement of the domain wall is prevented. They are prepared by heating the magnetic materials to the required temperature and then quenching them. Impurities increase the strength of hard magnetic materials. Soft magnetic materials are easy to magnetize and demagnetize. These materials are used for making temporary magnets. The domain wall movement is easy. Hence they are easy to magnetize. By annealing the cold worked material, the dislocation density is reduced and the domain wall movement is made easier. Soft magnetic materials should not possess any void and its structure should be homogeneous so that the materials are not affected by impurities.
How do you pull apart powerful magnets?
Some magnets are stronger than others, making them harder to pull apart. For strong magnets, you can pull the magnets sideways to get them apart.
What is the difference between hard and soft magnetic materials?
Materials which retain their magnetism and are difficult to demagnetize are called hard magnetic materials. These materials retain their magnetism even after the removal of the applied magnetic field. Hence these materials are used for making permanent magnets. In permanent magnets the movement of the domain wall is prevented. They are prepared by heating the magnetic materials to the required temperature and then quenching them. Impurities increase the strength of hard magnetic materials. Soft magnetic materials are easy to magnetize and demagnetize. These materials are used for making temporary magnets. The domain wall movement is easy. Hence they are easy to magnetize. By annealing the cold worked material, the dislocation density is reduced and the domain wall movement is made easier. Soft magnetic materials should not possess any void and its structure should be homogeneous so that the materials are not affected by impurities.
What elements are used in making alnico magnets?
the element is cobalt
Electromagnets are generally weaker than permanent magnets?
Depends on the size. One good example of a powerful electromagnet is the one used to lift cars at junk yards. Permanent magnets are not used for that due to the sheer power needed to lift cars. Also, electromagnets can be turned ON and OFF making them useful in picking up and then dropping the junk cars as needed. Another big example of electromagnets are the ones used on power generators to generate electric power.
