What is 1eV ?
When a charge Q is accelerated through a potential difference of V in an electric field the charge gains energy which is given as Q. V, this energy is usually expressed in the unit of electron volt. It is an important unit of energy which is used in Nuclear Physics (which you will study in class XII).
The electron volt is an amount of energy gained by an electron when accelerated through a potential difference of 1 volt. It is denoted by eV.
By definition
1ev electronic charge × IV = (1.6×1-19C) (1) = 1.6 x 10-19 J
Thus, I eV 1.6 x 10-19 J
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