An electron revolves around an infinite cylindrical wire having uniform linear charge density 2 × 10^-8 C m^-1 in circular path under the influence…

An electron revolves around an infinite cylindrical wire having uniform linear charge density $\displaystyle 2 \times 10^{-8} \mathrm{C} \mathrm{m}^{-1}$ in circular path under the influence of attractive electrostatic field as shown in the figure. The velocity of electron with which it is revolving is $\displaystyle \_\_\_\_$ $\displaystyle \times 10^6 \mathrm{~m} \mathrm{~s}^{-1}$. Given mass of electron $\displaystyle =9 \times 10^{-31} \mathrm{~kg}$