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  4. An electron is accelerated through a potential difference of V volts. The speed of electrons will be

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Q. An electron is accelerated through a potential difference of $V$ volts. The speed of electrons will be

J & K CETJ & K CET 2007Dual Nature of Radiation and Matter

Solution:

If $v$ is the velocity attained by electron, then
$\frac{1}{2} m v^{2}=e V$
$v=\sqrt{\frac{2 e V}{m}}$