What is one electron volt?

Dear Student,
 
1 electron volt (1eV)  is the amount of energy gained by an electron in moving through a potential difference of 1 volt.

$$\begin{gathered} 1\mathrm{eV}=\; 1.60217657\mathrm{x}{10}^{-19} \mathrm{C} \\ \mathrm{Therefore}, 1\mathrm{eV}=\; 1.60217657\mathrm{x}{10}^{-19} \mathrm{J}. \end{gathered}$$


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