Question

$1$ a.m.u. in terms of energy is :

• A. 93.1 V
• B. 931 eV
• C. 9.31 MeV
• D. 931 MeV

Answer 1

Answer: (D)

According to Einstein's mass energy equivalence, $E=m{c}^2$ where $c=$ velocity of light.
So, $E=1.66\times 10^{-27}\times {\left(3\times 10^8\right)}^2=14.94\times 10^{-11}J$
$E=\frac{14.94\times 10^{-11}}{1.6\times 10^{-19}}eV$ where $1eV=1.6\times 10^{-19}J$
$E=931\times 10^{6}eV=931MeV$