A cylindrical conductor of length 2 m and area of cross-section 0.2 mm^2 carries an electric current of 1.6 A when its ends are connected to a 2 V…

A cylindrical conductor of length $\displaystyle 2$ m and area of cross-section $\displaystyle 0.2 \mathrm{~mm}^2$ carries an electric current of $\displaystyle 1.6$ A when its ends are connected to a $\displaystyle 2$ V battery. Mobility of electrons in the conductor is $\displaystyle \alpha \times 10^{-3} \mathrm{~m}^2 / \mathrm{V}$.s. The value of $\displaystyle \alpha$ is : (electron concentration $\displaystyle =5 \times 10^{28} / \mathrm{m}^3$ and electron charge $\displaystyle =1.6 \times 10^{-19} \mathrm{C}$ )