(adsbygoogle = window.adsbygoogle || []).push({}); 1. The problem statement, all variables and given/known data

In a typical television tube, the electrons are accelerated through a potential difference of 25,000 volts. a) What speed do the electrons have when they strike the screen? And b) What is their kinetic energy in joules?

2. Relevant equations

[tex]K_m_a_x = hf - \varphi[/tex]

[tex]KE = \gamma mc^2 - mc^2[/tex]

3. The attempt at a solution

Well, i don't know where to start. How do you use the volts to obtain the velocity of the electron, so far, i haven't encountered any formular that can do that.(at least i didn't notice in the lecture)

Any help will be appreciated. Thanks

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# Electrons in television tube

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