The energy equivalent of one atomic mass unit is (a) 1.6 × 10⁻¹⁹ J (b) 6.02 × 10²³ J (c) 931 MeV (d) 9.31 MeV

Answer: (c). 1 u = 1.66 × 10⁻²⁷ kg, so E = mc² = 1.66 × 10⁻²⁷ × 9 × 10¹⁶ = 1.49 × 10⁻¹⁰ J E = 1.49 × 10⁻¹⁰1.6 × 10⁻¹³ MeV ≈ 931 MeV So the answer is (c) 931 MeV.

The energy equivalent of one atomic mass unit is | NEET 1992 (AIPMT)

Q32NEET 1992 · AIPMTEasy

Mass Defect & Binding Energy

The energy equivalent of one atomic mass unit is

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Answer: (c)

$1\ \text{u} = 1.66 \times 10^{-27}$ kg, so $E = mc^2 = 1.66 \times 10^{-27} \times 9 \times 10^{16} = 1.49 \times 10^{-10}$ J
$E = \dfrac{1.49 \times 10^{-10}}{1.6 \times 10^{-13}}\ \text{MeV} \approx 931$ MeV
So the answer is (c) 931 MeV.

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