Question

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

Options

• temperature

• material

• area of cross section

• None of these

Answer 1

None of these

 

The relation between the resistivity ρ and conductivity σ of a material is given by

\[\rho = \frac{1}{\sigma}\]

\[ \Rightarrow \rho \times \sigma = 1\]

The product of conductivity and resistivity is unity. So, this product does not depend on any of the given quantities.