Sat February 19, 2011 By: Sneha Ghodke

Mam,pls Define permeability,coercivity and retentivity of substance. How do we classify paramagnetic, diamagnetic & ferromagnetic substances on the basis of these given properties?

Expert Reply
Sun February 20, 2011

Dear student

Pls. post each query individually.

Permeability of a substance is a measure of its conduction of magnetic lines of force through it.

Coercivity of a magnetic substance is that value of magnetising field which is required to reduce the residual intensity of magnetisation in the sample to zero.

Value of intensity of magnetisation retained by the magnetic substance when the magnetiding field is reduced to zero is called retentivity.

Hope this helps.




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