Explain in detail about the types of magnetism, for e.g. - ferromagnet, paramagnet and diamagnet. Explain their uses also in detail.
We have made a science model and we have used ferromagnet in it. If the judges asked why have we used that, then please tell the reasons also.
Note - Explain in a easy language as far as possible.
No spamming.
We have made a science model and we have used ferromagnet in it. If the judges asked why have we used that, then please tell the reasons also.
Note - Explain in a easy language as far as possible.
No spamming.
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Magnetism: Physical Phenomena that are related to magnetic field.
Pics are taken from :Wikimedia (Non-Copyrighted images) and other two made by Paint:
Magnetic Classification of substances (according to magnetic behaviour) :
1) Diamagnetic Substances : (see pic 4)
=> Substances which are weakly repelled away from the magnet when brought close to a powerful magnet .
=>These Substances are faintly magnetised when opposite to the direction of magnetic field when placed in an external magnetic field.
=> They have tendency to move from stronger to the weaker part of magnetic field . (SEE PIC
)
=>Unlike,the way magnet attract metals like iron ,it would repel a diamagnetic substance .
Examples of diamagnetic substances : Bismuth,Zinc,Copper ,Silver ,gold,Lead,Water ,Hydrogen,etc.
2)Paramagnetic Substances: (see pic 3)
=> Substances which are weakly magnetised when placed in an external magnetic field .
=> They have tendency to move from a region of weak magnetic field to strong magnetic field ,i.e. they get weakly attracted to a magnet .
(see pic )
=> The individual atoms (ions or molecules) of paramagnetic material dipole posses a permanent magnetic dipole moment of their own .
Examples : Aluminium , Oxygen , Titanium ,Iron Oxide,etc,
3) Ferromagnetic : (see pic 1,2)
=> Substance which are strongly magnetised when placed in an external field .
=> They have strong tendency to move from a region of weak magnetic to strong magnetic field ,i.e, they get strongle attracted to a magnet .
=> The individual atoms (or ions or molecules) in a ferromagnetic material
posses a dipole moment,same as in paramagnetic material .
=> However, they interact with one -another in such a way that they spontaneously align themselves in a common direction over a macroscopic small volume .
=> When we apply an external magnetic field ,the domains orient themselves in the direction of that magnetic field .
For Example: Iron,Cobalt,Nickel,etc.
See pics:
Uses of Magnetic Materials: ( I am gving uses which are generally un-known ,however there are manY )
1) In Compact Hard-drives ,Ferro-magnetic materials are used to form a real around a rotating shaft .
2) In auto-mobiles ,Magnetic materials are used in brakes ,high -performance shock-absorbers, for civil engineering (construction sites) ,industries ,household appliances
.
3) Medicinal Use :
Carrying Medications to exact location within the body and aslo as contrasting agent in MRI scans.