At a temperature of `30^(@)C`, the susceptibility of a ferromagnetic material is found to be `chi`. Its susceptibility at `333^(@)C` is :

Options

A. `chi`
B. `0.5chi`
C. `2chi`
D. `0.09 chi`

Answer

D

Explanation

Susceptibility of ferromagnetic material is inversely proportional to temperature
`" "chi propto 1/T`
`therefore" "chi_(1)/chi_(2)=T_(2)/T_(1)`
Given `T_(1)=30^(@)C, T_(2)=333^(@)C, chi_(1)=chi`
`therefore" "chi_(2)=T_(1)/T_(2)chi=30/333chi=0.09chi`