GK
NUCLEAR SCIENCE
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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931J
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931 eV
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9.31 MeV
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931 Mev
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Detailed explanation-1: -One amu is equivalent to 931 MeV energy. The rest mass of electron is 9. 1×10−31 kg. The mass equivalent energy is (Here 1 amu =1.
Detailed explanation-2: -Since 1 amu is equivalent to 931.5 MeV of energy, the BE can be calculated using Equation 8.6.
Detailed explanation-3: -22. One amu is equivalent to 931 MeV energy. The rest mass of electron is 9.1 x 10 kg.
Detailed explanation-4: -Hence proved that 1 amu=931.5 MeV Using Einstein mass-energy equivalence. We know that 1 amu = 1/12th mass of an atom of carbon-12. Now substitute this in mass-energy equivalence equation. Calculate the velocity of an electron placed in the third orbit if hydrogen atom.
Detailed explanation-5: -E=mC2. =1. 66×10−27 and C=3×108 We get E=1. 66×10−27×(3×108)2J. =1. 49×10−10J. As 1MeV=1. 6×10−13J. Hence the mass equivalent of 931. 25MeV energy is 1. 66×10−27