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CLASSIFICATION OF MAGNETIC SUBSTANCES


CLASSIFICATOIN OF 
MAGNETIC SUBSTANCS

ALL THE SUBSTANCES ARE CLASSIFIED INTO THREE TYPES BASED ON THEIR MAGNETIC PROPERTIES. THEY ARE 1. DIA, 2. PARA AND 3. FERRO MAGNETIC SUBSTANCE
.

1  Dia substances are repelled
     by the magnet.
    Para substances are feebly attracted by the magnet.

    Ferro substances are strongly attracted by the magnet 


2 Example of dia substances:  Bi, Zn, Ag, Cu, Au .
Example of para substances Al, Pt, Mn, CuCl2,O2.
Example of ferro magnetic substances : Fe,Co, Fe2O4,Ni

3 Susceptibility of dia substances is negative.
        Susceptibility of  para magnetic substances is positive, low.
Susceptibility of ferro substances is  positive , high


4 Permeability of dia magnetic substances is  less than 1.
      Permeability of para magnetic substances is greater than1
       Permeability of ferro magnetic substances is  greater than1



5. When a dia substance is placed in the form of liquid in a non-          uniform external field, it moves from stronger part towards              weaker part.

     When a para substance is placed in a non-uniform                             external field,it moves from edges part towards poles.

    When a Ferro substance in the form of liquid is placed in a

    non-uniform external field,it moves towards poles.

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