Physics - Current Electricity Question with Solution | TestHub

Given, Resistivity of copper $\rho =1.72\times 10^{-8}\Omega -\mathrm{m}$ Electrons density $\mathrm{n}=8.5\times 10^{26}/{\mathrm{m}}^3$ $\begin{array}{rl}\therefore \text{ Mobility }(\mu )& =\frac{1}{\rho \text{ ne }}\\ & =\frac{1}{1.72\times 10^{-8}}\times 8.5\times 10^{28}\times 1.6\times 10^{-19}\\ & =4.25\times 10^{-3}{\mathrm{m}}^2/\mathrm{C}\Omega \end{array}$