Use the data in Table on page 23 of this book to answer the following:
(a) Which among iron and mercury is a better conduction?
(b) Which material is the best conductor?
(a) The electrical resistivity of iron is 
. And, the electrical resistivity of mercury is 
. Since the resistivity of mercury is greater than that of iron, it will offer more hindrance to current flow as compared to iron. Therefore, iron is a better conductor than mercury.
(b) Silver metal has the lowest resistivity nearly about 1.60 x 10-8
m. Therefore, silver metal is the best conductor of electricity.
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