Relative magnetic permeability of a magnetic medium is 1000 .If magnetic field at any point in the medium be 0.1 Wb . `m^(-2)`what will be the values of magnetic intensity of magnetisation at that point .

Explanation

Here , `B=0.1"Wb".m^(-2)andmu_(r)=1000`
`" So, " mu=mu_(0)mu_(r)=4pixx10^(-7)xx1000=4pixx10^(-4)H.m^(-1)`
Now , magnetic intensity , `H=(B)/(mu)=(0.1)/(4pixx10^(-4))=79.6A.m^(-1)`
Again , `B=mu_(0)(H+M)`
`therefore` Intensity of magnetisation
`M=(B)/(mu_(0))-H=(0.1)/(4pixx10^(-7))-79.6`
`=79577.5-79.6=79497.9A.m^(-1)`