NEET UG 2025 · Physics · Question 17
NEET 2025 Physics, question 17
Question 17 of the NEET 2025 paper (code 45) is a Physics question from System of Particles and Rotational Motion. Its idea, Conservation of Angular Momentum, was asked twice, in 2018 and 2025, across NEET 2017–2026. The NTA final answer key gives option 4.
Updated 2026-10-08
Q17 · Physics
The Sun rotates around its centre once in 27 days. What will be the period of revolution if the Sun were to expand to twice its present radius without any external influence? Assume the Sun to be a sphere of uniform density.
- 1100 days
- 2105 days
- 3115 days
- 4108 daysOfficial answer
Official answer: option 4 · NTA final answer key
Same idea
Conservation of Angular Momentum, in other papers
NEET asked this idea twice, in 2018 and 2025. The other question below.
- 2018 Q38A solid sphere is rotating freely about its symmetry axis in free space. The radius of the sphere is increased keeping its mass same.…One-line MCQ · Easy
Conservation of Angular Momentum: every question and how it was framed
The chapter
System of Particles and Rotational Motion in ten years of NEET
25 questions from 2017–2026, asked in 10 of 10 papers, about 2.4 a paper. Rotational Motion alone had 21.