Electron volt is defined as the energy acquired by an electron when it is accelerated through a potential difference of 1 volt.
The value of electron volt (eV) is given as,
1 eV = (1.602 × 10-19 coulomb) × (1 volt)
1 eV = 1.602 × 10-19 joule
The value of milli-electron volt (MeV) is given as,
1 MeV = 105 eV
1 MeV = 1.602 × 10-13 J