When subjected to a transverse electric field,cathode rays move

When the speed of electrons increases,then the value of its specific charge

Write and explain the methods to obtain the emission of electrons from a metal surface.

In an electron gun, electrons are accelerated by a potential difference $V$. If $e$ is the charge and $m$ is the mass of an electron, then the maximum velocity of these electrons will be

To emit an electron from a metal surface, the minimum electric field required is . . . . . . .

Cathode rays are produced when the pressure is of the order of