Voltas leictreach i volta (V) go fuinneamh i áireamhán leictreon-volta (eV).
Iontráil an voltas i volta, luchtú i mbunmhuirear nó coulombs agus brúigh an cnaipe Ríomh :
Tá an fuinneamh E i voltais leictreon (eV) cothrom leis an voltas V i volta (V), uaireanta an lucht leictreach Q i muirear bunúil nó muirear prótóin / leictreon (e):
E (eV) = V (V) × Q (e)
Is é an bunmhuirear muirear leictreach 1 leictreon leis an tsiombail e.
Tá an E fuinnimh in leictreon-volta (eV) comhionann leis an voltas V i voltanna (V), uair an muirear Q leictreach i Coulombs (C) arna roinnt 1.602176565 × 10 -19 :
E (eV) = V (V) × Q (C) / 1.602176565 × 10 -19
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