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eV

eV

12 8.6
A small unit of energy equal to the energy an electron gains when it moves through one volt
  • noun
  • /iː viː/
  • Specialized
translation icon : electronvoltio
  • Scientists use the unit of eV to measure the energy levels of electrons in different materials.

Examples

  • Over 13 years, three methods were used to detect EV in South Korea.

    Academic text (2013)
  • Therefore, all decisions would be deemed appropriate by EV calculations.

    Academic text (2004)
  • Any cost analysis should include the EV Tax Credit as it is universally available.

    Blog text (21)
  • On the other hand, the electric motor in an EV is roughly 90% efficient.

    Blog text (1)
  • Then you can compare that to how far an EV goes on the same number of kWhs.

    Blog text (1)
  • 1 joule of electricity will propel an EV 3 to 6 times as far.

    Blog text (1)
  • First, even if powered entirely by coal, an EV produces less CO2 than an ICE.

    Blog text (1)
  • The difference is that the PHEV works like an EV and plugs into a wall socket to charge the batteries.

    Academic text (2009)
  • The electric car completed the trip using less than 50 kilowatt-hours of energy, which translates to about 50 eV per charge.

  • In physics class, we learned that one eV is the energy gained by an electron moving through an electric potential of one volt.

Synonyms

electron volt
vseV
  • Specialized
1 5.6

A unit that measures very small energy for atoms and particles

gives the same definition without mentioning physics usage
energy unit
vseV
  • Specialized
1 3.0

A way to measure energy, like a calorie or joule

gives a precise amount of energy based on an electron moving through one volt

Surface Forms

eV singular
eVs plural

Morphology

eV = electron + volt (transparent) = e + V

The symbol 'eV' is a conventional abbreviation formed from 'electron' + 'volt', so knowing those base words directly yields the meaning.

Etymology

The word eV is short for electron volt, where electron means 'a tiny charged particle' and volt means 'a unit of electric push'. So an eV is the small amount of energy an electron gets from one such 'push', and that is why scientists use eV as a handy small energy unit.