Q 12-03-022NEETNEET 2020Top questionEasy
A charged particle having drift velocity of $7.5 \times 10^{-4}\ \text{m s}^{-1}$ in an electric field of $3 \times 10^{-10}\ \text{V m}^{-1}$, has a mobility in $\text{m}^2\text{V}^{-1}\text{s}^{-1}$ of :
Answer: (B) $2.5 \times 10^6$
$$\mu = \frac{v_d}{E} = \frac{7.5 \times 10^{-4}}{3 \times 10^{-10}} = 2.5 \times 10^6\ \text{m}^2\text{V}^{-1}\text{s}^{-1}$$
Solution by Sreeraj P, M.Sc Physics