Define electronVolt and convert it into Joule unit.

Explanation

If an electron with charge q =e=`1.6xx10^(-19)` C
is accelerated by a potential difference of 1 volt it would gain energy `=qDeltaV`
`=1.6xx10^(-19)xx1`
`[ because DeltaV =1V]`
`=1.6xx10^(-19)`j
This unit of energy is defined as 1 electron volt or 1 eV.
Definition:"if an electron according through a potential difference of one volt the difference in potential (or kinetic) energy of an electron is known as one electron volt".
This unit are most commonly used in atomic , nuclear and particle physics. Multiplier and submultiplier of eV:
`I meV 1.6 xx 10^(-22) J `
`1 keV = 1.6 xx 10^(-16)`j
`1 Me = 1.6xx10^(-13) J`
`1 Ge V = 1.6xx10^(-10) J`
`1 TeV= 1.6xx10^(-7) `J