Question

As the temperature of a metallic resistor is increased, the product of resistivity and conductivity:

• A. increases
• B. decreases
• C. may increase or decrease
• D. remains constant

Answer 1

The correct option is D remains constant

$\begin{array}{c}Resistivity=\frac{1}{conductivity}\\ productofresistivityandconductivityisequaltoacons\tan t\end{array}$

Hence,

option $\left(D\right)$ is correct answer.