Physics

Problem

A paramagnetic sample shows a net magnetisation of

6 \text{ A/m}

when it is placed in an external magnetic field of

0.4 \text{ T}

at a temperature of

4 \text{ K}

. When the sample is placed in an external magnetic field of

0.3 \text{ T}

at a temperature of

24 \text{ K}

, then the magnetisation will be : a.

1 \text{ A/m}

4 \text{ A/m}

2.25 \text{ A/m}

0.75 \text{ A/m}