JEE Advanced 2016 Physics question
The electrostatic energy of protons uniformly distributed throughout a spherical nucleus of radius is given by
E=
The measured masses of the neutron, , and are 1.008665 u, 1.007825 u, 15.000109 u and 15.003065 u, respectively. Given that the radii of both the and nuclei are same, 1 u = 931.5 MeV/ ( is the speed of light) and MeV fm. Assuming that the difference between the binding energies of and is purely due to the electrostatic energy, the radius of either of the nuclei is (1 fm = m)
Answer: (C)
Solution
Mass defect of N (7 H atoms + 8 neutrons): u. Mass defect of O (8 H atoms + 7 neutrons): u. Difference in binding energy MeV.
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