Physics - NLM Question with Solution | TestHub

Electrostatic force $=$ centripetal force $$\frac{1}{4\pi {\epsilon }_0}\frac{Z{e}^2}{r^2}=\frac{m{v}^2}{r}$$ $\therefore v=\sqrt{\left(\frac{1}{4\pi {\epsilon }_0}\frac{Z{e}^2}{mr}\right)}$ $=\sqrt{\frac{9\times 10^9\times 1\times {\left(1.6\times 10^{-19}\right)}^2}{\left(9.1\times 10^{-31}\right)\times \left(0.1\times 10^{-9}\right)}}=1.59\times 10^6\mathrm{ms}$ $-1$