Question

The product of resistivity and conductivity of a conductor is constant. Explain it.

Answer 1

Conductivity $\left(\sigma \right)$ is defined as the reciprocal of resistivity $\left(\rho \right)$ i.e $\sigma =\frac{1}{\rho }$

$⟹$ $\sigma \rho =1=constant$

Hence the given statement is true.