Question

A charged particle having drift velocity of $7.5\times {10}^{-4}{\text{ms}}^{-1}$ in an electric field of $3\times {10}^{-10}{\text{Vm}}^{-1}$, has a mobility of (in${\text{m}}^2{\text{V}}^{-1}{\text{s}}^{-1}$)

• A. $2.25\times {10}^{15}$
• B. $2.25\times {10}^{-15}$
• C. $2.5\times {10}^{-6}$
• D. $2.5\times {10}^6$

Answer 1

The correct option is D $2.5\times {10}^6$

Mobility is,

$\mu =\frac{v_d}{E}=\frac{7.5\times {10}^{-4}}{3\times {10}^{-10}}$

where, $v_d$-is drift velocity

$\mu =2.5\times {10}^6{\text{m}}^2{\text{V}}^{-1}{\text{s}}^{-1}$

<!--td {border: 1px solid #ccc;}br {mso-data-placement:same-cell;}--> Hence, $\left(D\right)$ is the correct answer.