Question

The mass and energy equivalent of 1 amu are respectively

• A. $1.67\times {10}^{-27}gm,9.30MeV$
• B. $1.67\times {10}^{-27}kg,930MeV$
• C. $1.67\times {10}^{-27}kg,1MeV$
• D. $1.67\times {10}^{-34}kg,1MeV$

Answer 1

The correct option is B $1.67\times {10}^{-27}kg,930MeV$

1 atomic mass unit $=1.67\times {10}^{-27}kg=$ mass of one proton

Energy equivalent $=m{c}^2=\frac{(1.67\times {10}^{-27})\times (9\times {10}^{16})}{1.6\times {10}^{-19}}=930MeV$

Hence, Option B is correct.