How we can measure the speed of the electron in an electric field

[hadi amiri 4]

how we can measure the speed of the electron in an electric field

 

[anonymoussome]

Under relativistic speeds the velocity can be calculated by expression for kinetic energy.

 

[maverick_starstrider]

You could also get a rough estimate by applying a magnetic field and exploiting F=q v x B and determining the curvature. You'd need to know the strength of the electric field though.