Giant Stars vs Dwarf Stars
Question
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?
Options
Both Statement-I and Statement-II are correct and Statement-II explains Statement-I
Both Statement-I and Statement-II are correct, but Statement-II does not explain Statement-I
Statement-I is correct, but Statement-II is incorrect
Statement-I is incorrect, but Statement-II is correct
Explanation
Statement-I is incorrect; massive giant stars have much shorter lifespans than dwarf stars. Statement-II is correct; because of their immense gravitational pressure and core temperatures, giant stars burn through their nuclear fuel at a drastically greater rate of nuclear reactions, which is precisely why they exhaust their fuel and die so quickly.
Answer: (d).
Question details
Year
2024
Paper
GS Paper 1
Question
Q32
Subject
Science & Technology
Sub-topic
Space Technology & Astronomy
Type
Assertion-Reason
Difficulty
Hard
Nature
Static
Source hint
NCERT Physics Cl.12 / Stellar Evolution & Nuclear Fusion Rates
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