Modelová Otázka ID 3403 - 
Elektronvolt (eV) je:
Správná odpověď je: B
Elektronvolt (eV = 1,602 · 10–19 J) je vedlejší jednotkou energie. Je to množství energie odpovídající kinetické energii elektronu, který je ve vakuu urychlen napětím o velikosti 1 V (volt). Vzhledem ke své malé velikosti nachází tato jednotka využití především ve fyzice mikrosvěta.
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