Q. Which of the following arrangements is correct on the basis of conductivity of materials?
Current Electricity
Solution:
Conductors
Resistivity $\rho(\Omega\, m )$ at $0^{\circ} C$
Silver
$1.6 \times 10^{-8}$
Copper
$1.7 \times 10^{-8}$
Aluminium
$2.7 \times 10^{-8}$
Tungsten
$5.6 \times 10^{-8}$
Conductivity $(\sigma)= \frac{1}{\text { Resistivity }(\rho)}$
| Conductors | Resistivity $\rho(\Omega\, m )$ at $0^{\circ} C$ |
|---|---|
| Silver | $1.6 \times 10^{-8}$ |
| Copper | $1.7 \times 10^{-8}$ |
| Aluminium | $2.7 \times 10^{-8}$ |
| Tungsten | $5.6 \times 10^{-8}$ |