Use the data in Table 12.2 to answer the following (a) Which among iron and mercury is a better conductor? (b) Which material is the best conductor?

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?

 

Answer:- 

(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.