Question

Define electron volt and convert it into joules.

Answer 1

An electron volt (eV) is the energy gained by an electron when it moves through a potential difference of 1 volt.

1 eV = charge of an electron × 1 V

= 1.6 × 10⁻¹⁹ C × 1 V

= 1.6 × 10⁻¹⁹ J