NEET UG 2018 · Physics · Question 38
NEET 2018 Physics, question 38
Question 38 of the NEET 2018 paper (code AA) 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 CBSE official answer key gives option 4.
Updated 2026-10-08
Q38 · Physics
A solid sphere is rotating freely about its symmetry axis in free space. The radius of the sphere is increased keeping its mass same. Which of the following physical quantities would remain constant for the sphere ?
- 1Rotational kinetic energy
- 2Moment of inertia
- 3Angular velocity
- 4Angular momentumOfficial answer
Official answer: option 4 · CBSE official answer key
Same idea
Conservation of Angular Momentum, in other papers
NEET asked this idea twice, in 2018 and 2025. The other question below.
- 2025 Q17The 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…Numerical · Medium
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.