First slide
Magnetic properties of materials
Question

The susceptibility of a magnesium at 300 K is 1.2×105 .  The temperature (in K) at which the susceptibility increases to 1.8×105  is ---------------

Moderate
Solution

As per Curie's Law , Magnetic susceptibility is given by

                                               χ=cTχ1χ2=T2T1 1.2X10-51.8X10-5=T2300 T2=200K

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