Answer to Question #315777 in Electricity and Magnetism for Ndiga

Question

An electron is placed in an electric potential of 1nV. Determine the velocity of the electron after passing through the potential assuming it was motionless in the beginning

Answer 1

We know that

$\frac{1}{2}mv^2=eV$

$v=\sqrt{\frac{2eV}{m}}$

$$v=\sqrt{\frac{2\times1.6\times10^{-19}\times10^{-9}}{9.1\times10^{-31}}}=18.75m/sec$$