How are electrons accelerated in a cathode ray tube? - Leaving Cert Physics - Question (i) - 2007

Electrons in a cathode ray tube are accelerated by a large potential difference (voltage) applied between the cathode and the anode. This creates an electric field that exerts a force on the electrons as they are emitted from the cathode.

As the electrons move towards the anode, they gain kinetic energy due to the work done by the electric field. The relationship between the electric potential ( V ) and the kinetic energy ( KE ) of the electrons can be described by the equation:

$KE = eV$

where e is the charge of the electron. Therefore, the greater the voltage, the greater the acceleration and resulting speed of the electrons.