Question

The product of resistivity and conductivity of a cylindrical conductor depends on

• A. Temperature
• B. Material
• C. Area of cross-section
• D. None of the above

Answer 1

The correct option is D None of the above

The product of resistivity and conductivity of a cylindrical conductor is constant

The product becomes

$\rho \times \sigma$, where $\rho$is resistivity and $\sigma$ is conductivity

We know that

$\rho =\frac{1}{\sigma }$

Hence there product is equal to 1 i.e., constant.

Hence it does no depend on any of the physical quantity.