Q. Use the data in Table 12.2 to answer the following −
Table 12.2 Electrical resistivity of some substances at 20°C
(a) Which among iron and mercury is a better conductor?
(b) Which material is the best conductor?
(a) In the said table we can see that the resistivity of mercury is more than that of iron. Therefore iron is a better conductor than mercury.
(b) In the said table we can see that the resistivity of silver is the lowest among the all materials. Hence, it is the best conductor.