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Friday, 9 October

NEET UG 2025 · Physics · Question 30

NEET 2025 Physics, question 30

Question 30 of the NEET 2025 paper (code 45) is a Physics question from Atoms. Its idea, Angular Momentum Quantization, was asked only this once in NEET 2017–2026. The NTA final answer key gives option 3.

Updated 2026-10-08

Q30 · Physics

A particle of mass mm is moving around the origin with a constant force FF pulling it towards the origin. If Bohr model is used to describe its motion, the radius rr of the nthn^{th} orbit and the particle's speed vv in the orbit depend on nn as

  1. 1r∝n1/3r \propto n^{1/3}; v∝n1/3v \propto n^{1/3}
  2. 2r∝n1/3r \propto n^{1/3}; v∝n2/3v \propto n^{2/3}
  3. 3r∝n2/3r \propto n^{2/3}; v∝n1/3v \propto n^{1/3}Official answer
  4. 4r∝n4/3r \propto n^{4/3}; v∝n−1/3v \propto n^{-1/3}

Official answer: option 3 · NTA final answer key

Same idea

The only question on Angular Momentum Quantization

No other NEET paper from 2017–2026 tested this exact idea.

Angular Momentum Quantization: every question and how it was framed

The chapter

Atoms in ten years of NEET

13 questions from 2017–2026, asked in 9 of 10 papers, about 1.3 a paper. Bohr's Atomic Model alone had 13.

Chapter analysisStudy this chapterPractise this chapter

Atoms: questions per paper

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