Question

Question #591b0

Answer 1

The electron volt (eV) is the work done in moving one electron through a potential difference of 1 volt.

Explanation:

If 1 Coulomb of charge is moved through a potential difference of 1 volt then 1 Joule of work is done.

Since the charge on the electron is `1.6xx10^(-19)"C"` then :

`1eV=1.6xx10^(-19)"J"`

The erg is an obsolete, non-SI unit for energy. It has the units `g.cm^(2)"/"s^(2)`.

It's a very small unit. According to Wiki it's the energy equivalent of a fly doing a push-up.

1 erg `=10^(-7)"J"`

So 1eV`=(1.6xx10^(-19))/(10^(-7))=1.6xx10^(-12)"erg"`