The susceptibility of magnesium at `300 K` is `1.2 xx 10^(-5)`. At what temperature will the susceptibility increase to `1.8 xx 10^(-5)`?

Options

A. 100K
B. 400K
C. 300K
D. 200K

Answer

D

Explanation

`x_(1)=1.2xx10^(-5).T_(1)=300 K,`
`x_(2)=1.8xx10^(-5),T_(w)=?`
`x oo (1)/(T)`
`therefore (T_(2))/(T_(1))=(x_(1))/(x_(2))`
`T_(2)=(1.2xx10^(-5))/(1.8xx10^(-5))xx300=200K`