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Define amu and eV. Mention the relation ...

Define amu and eV. Mention the relation between them.

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Atomic mass unit (amu) is `(1^(th))/(12)` of the mass of a carbon atom in its lowest energy state. One electron volt (eV) is the energy gained by an electron when it is accelerated through a potential difference of 1 V.
1 amu`=931.8 MeV`.
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