Question

How much energy is gained by an electron accelerated through a potential difference of 2.5x104 V?

Answer 1

Given data

*The given potential difference is V = 2.5 x 10^4 V

*The value of the charge of the electron is q = 1.6 x 10^-19 J

The formula for the energy is gained by the electron is given as

$U=qV$

Substitute the known values in the above expression as

$\begin{gathered} U=(1.6\times10^{-19})(2.5\times10^4) \\ =4.0\times10^{-15}\text{ J} \end{gathered}$

Hence, the energy is gained by the electron is U = 4.0 x 10^-15 J