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Delzac
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Homework Statement
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?
Homework Equations
[tex]K_m_a_x = hf - \varphi[/tex]
[tex]KE = \gamma mc^2 - mc^2[/tex]
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 formula that can do that.(at least i didn't notice in the lecture)
Any help will be appreciated. Thanks