Question

An electron revolves around an infinite cylindrical wire having uniform linear charge density $2×10^{–8}\ Cm^{-1}$ 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 ____ $\times 10^6 ms^{-1}$. Given mass of electron = $9\times10^{-31}$ kg.

Answer 1

The answer is 8.