NEET Physics Mass-Energy Relation MCQ Question
Which of the following statements about the mass-energy relation and nuclear density is correct?
The mass-energy relation implies that mass and energy are conserved separately in nuclear reactions.
Nuclear density is independent of the size of the nucleus, while atomic mass varies significantly with size.
Einstein's equation E = mc² indicates a unified law of conservation of mass and energy.
The atomic mass unit (u) is defined as the mass of a hydrogen atom, making it a fundamental unit for all elements.
Correct Answer
Detailed Explanation
Einstein's equation E = mc² signifies that mass and energy are interchangeable and must be considered together in nuclear reactions, as stated in the context. Option A incorrectly states that mass and energy are conserved separately, which contradicts the unified law. Option B is correct in that nuclear density is indeed independent of size, but it doesn't address the mass-energy relation. Option D misdefines the atomic mass unit, which is based on the carbon-12 atom.
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