An electron revolves around an infinite cylindrical wire having uniform linear charge density \( 2 \times 10^{-8} \, \text{C m}^{-1} \) 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 ______ \( \times 10^{6} \, \text{m s}^{-1} \).
Given mass of electron \( = 9 \times 10^{-31} \, \text{kg} \).
