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What is the significance of hysteresis?
Hysteresis is the delay between an observed outcome and the quantity of change applied.When a ferromagnetic material is magnetized in one direction, it will not relax back to zero magnetization when the imposed magnetizing field is removed. It must be driven back to zero by a field in the opposite direction. If an alternating magnetic field is applied to the material, its magnetization will trace out a loop called ahysteresis loop. The lack of retraceability of the magnetization curve is the property called hysteresis and it is related to the existence of magnetic domains in the material. Once the magnetic domains are reoriented, it takes some energy to turn them back again. This property of ferrromagnetic materials is useful as a magnetic "memory". Some compositions of ferromagnetic materials will retain an imposed magnetization indefinitely and are useful as "permanent magnets". The magnetic memory aspects of iron and chromium oxides make them useful in audiotape recording and for the magnetic storage of data on computer disks.Variations in Hysteresis CurvesThere is considerable variation in the hysteresis of different magnetic materials.
When is a material useful?
Any material is useful when someone uses it to make something.
In what situations would a magnetic sweeper be useful?
A magnetic sweeper would be useful in a situation when someone needs to pick up and find metal items, such as iron. This may be useful in steel work companies.
What are the ends of an electromagnet that are useful called?
Magnetic poles
How a compass works and why it is useful?
A compass has a magnet that points north, according to the Earth's magnetic field. It is useful, precisely, to find out where north is.A compass has a magnet that points north, according to the Earth's magnetic field. It is useful, precisely, to find out where north is.A compass has a magnet that points north, according to the Earth's magnetic field. It is useful, precisely, to find out where north is.A compass has a magnet that points north, according to the Earth's magnetic field. It is useful, precisely, to find out where north is.
What useful material may be obtained from bauxite what useful material may be obtained from hematite what are bauxite and hematite called since they produce useful material?
Bauxite is aluminum ore, hematite is iron ore.
How butterflies and bees useful to plants?
They carry pollen grains from one flower to another.
Is magnetic matter?
Yes it is
What is a characteristic of electromagnets that makes them useful in simple tools?
they are magnetic
Are magnetic fields useful?
i have no freakin idea xP hahahahhaha
Why are magnets useful for fridges?
because fridges are magnetic and for decoration
Why aluminium filings can not be used to show the magnetic field?
Aluminum, while recyclable and very useful, is non-magnetic.
