Question

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

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

Answer 1

Answer: (B)

Mobility, $\mu =\frac{v_{d}}{E}$
$=\frac{7.5 \times 10^{-4}}{3 \times 10^{-10}}$
$=2.5 \times 10^{6}$