Question.
(a) Which among iron and mercury is a better conductor?
Given,
$\rho_{\text {iron }}=10.0 \times 10^{-8} \Omega \mathrm{m}$
and
$\rho_{\text {mercury }}=94.0 \times 10^{-8} \Omega \mathrm{m}$
(b) Which material is the best conductor ?
(a) Which among iron and mercury is a better conductor?
Given,
$\rho_{\text {iron }}=10.0 \times 10^{-8} \Omega \mathrm{m}$
and
$\rho_{\text {mercury }}=94.0 \times 10^{-8} \Omega \mathrm{m}$
(b) Which material is the best conductor ?
solution:
(a) Iron is a better conductor than mercury as resistivity $(\rho)$ for iron is less than that for mercury.
(b) Silver is the best conductor because its resistivity $(\rho)$ is least.
(a) Iron is a better conductor than mercury as resistivity $(\rho)$ for iron is less than that for mercury.
(b) Silver is the best conductor because its resistivity $(\rho)$ is least.