Nuclear Fusion
In a fusion reaction, four hydrogen nuclei combine to form one helium nucleus. If the mass defect is 0.0286 u, what is the energy released?
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About This Question
- Subject
- physics
- Chapter
- atoms and nuclei
- Topic
- nuclear fusion
- Difficulty
- Medium
- Year
- 2025
Solution
Correct Answer:
26.6 MeV
- Energy Formula: Energy produced Q=Δm×931.5 MeV/u, where Δm is the mass lost.
- Identify Mass Defect: Δm=0.0286 u.
- Calculation:
- Q=0.0286×931.5.
- Final Value:
- Q≈26.6 MeV.
- Significance: This is the energy liberated in the p-p chain occurring in the Sun.
This medium difficulty physics question is from the chapter atoms and nuclei, covering the topic of nuclear fusion. It appeared in the 2025 exam.
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