Question

As the temperature of a conductor increases,its resistivity and conductivity change.why does the ratio of its resistivity and conductivity increase.Why does it not decrease or remain constant.Why can it not increase or decrease depending on the actual temperature.

Answer 1

$$\begin{gathered} resistivity=\frac{1}{conductivity} \\ hence \\ \frac{resistivity}{conductivity}=(resistivity{)}^2 \\ thereforewhentempchanges,resistivitychangeshenceratioofresistivitytoconductivitychanges. \end{gathered}$$