An electron accelerated through 100 V has kinetic energy (in eV) equal to

1. 1 eV is defined as the energy gained by an electron across 1 V of potential difference. 2. Across V volts, an electron gains eV = e × V joules of kinetic energy. 3. Expressed in eV, this is simply V eV. 4. So through 100 V, the electron gains 100 eV of kinetic energy. _Source: syllabus Physics, Ch 11 "Dual Nature of Radiation and Matter", §11.2_