# 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?

S seema garhwal

Lower the value of resistivity lower will be the resistance for a material of given area and length. If resistance is law current flow will be high when a potential difference is applied across the conductor.

(a).resistivity of iron =$10.0\times 10^{-8} \Omega m$

the resistivity of mercury =$94\times 10^{-8} \Omega m$

the resistivity of mercury is more than iron so iron is a better conductor than mercury.

(b).From the table, we can observe silver has the lowest resistivity so it is the best conductor.

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