UPSC Prelims 2024 Question on – Giant Stars vs Dwarf Stars | Stellar Lifetimes
Q. Consider the following statements:
Statement-I: Giant stars live much longer than dwarf stars. Statement-II: Compared to dwarf stars, giant stars have a greater rate of nuclear reactions.
Which one of the following is correct in respect of the above statements?
✅ Correct Answer: (d)
Explanation:
Statement-I – Incorrect: Giant stars have shorter lifespans because they burn their nuclear fuel very rapidly.
Statement-II – Correct: Giant stars have higher core temperatures and pressures, leading to faster nuclear fusion rates.
Key Concept: More mass → faster fuel consumption → shorter life.
