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Mass defect = B.E / c²

1. Mass of nucleus = Mass of proton + mass of neutron - mass defect
2. As a result of fusion, enormous amount of heat is liberated which is the main cause of source of solar energy.
3. E = (Δm) × 931 MeV = 0.0307 × 931 = 28.5 MeV
4. For nuclear fusion process the nuclei with low mass are suitable.

Correct answer: Mass of nucleus = Mass of proton + mass of neutron - mass defect

Solution

Option A is correct because the mass of a nucleus is less than the sum of the masses of its protons and neutrons by the mass defect, which corresponds to the binding energy of the nucleus.

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