Jump to a section

Physics - Atomic Physics

Practise 25 JEE Advanced previous year questions on Atomic Physics, compiled from papers spanning 2006 to 2026. Each question is pulled directly from the actual exam paper it appeared in, so you're practising in the exact style and difficulty JEE Advanced tests.

Atomic Physics has been asked in 16 of the 27 years of JEE Advanced papers analysed (2000–2026), with 25 questions in all. 16% of them were easy, 60% moderate and 24% tough. Most of its questions came from 2025, with 3 questions that year. In the last three years (2024–2026) it had 5 questions across 6 papers, about 0.8 per paper.

The chapter's 3 topics are not weighted equally: Bohr's Atomic Model (15 questions, 60%), Atomic Spectrum (9 questions, 36%), and Atomic Structure (1 question, 4%) have been asked the most. Bohr's Atomic Model has also led over the last five years, with 3 questions. Bohr's Atomic Model has produced the most tough questions (4).

  1. 1Consider a hydrogen atom with , , and denoting the velocity, orbital radius and kinetic energy of the electron in the orbit, respectively. T2026 (Paper 1)Bohr's Atomic Model
  2. 2Consider an electron in the orbit of a hydrogen-like atom with atomic number . At absolute temperature , a neutron having thermal energy has2025 (Paper 1)Bohr's Atomic Model
  3. 3List-I shows various functional dependencies of energy on the atomic number . Energies associated with certain phenomena are given in List-I2025 (Paper 1)Atomic Spectrum
  4. 4A hydrogen atom, initially at rest in its ground state, absorbs a photon of frequency and ejects the electron with a kinetic energy of 10 eV2025 (Paper 2)Bohr's Atomic Model
  5. 5A particle of mass is moving in a circular orbit under the influence of the central force , corresponding to the potential energy , where is2024 (Paper 1)Atomic Structure
  6. 6Which of the following statement(s) is (are) correct about the spectrum of hydrogen atom?2021 (Paper 1)Atomic Spectrum
  7. 7A particle of mass m moves in circular orbits with potential energy U r = F r , where F is a positive constant and r is its distance from th2020 (Paper 1)Bohr's Atomic Model
  8. 8A free hydrogen atom after absorbing a photon of wavelength a gets excited from the state n = 1 to the state n = 4 . Immediately after that 2019 (Paper 2)Bohr's Atomic Model
  9. 9Consider a hydrogen-like ionized atom with atomic number Z with a single electron. In the emission spectrum of this atom, the photon emitted2018 (Paper 2)Bohr's Atomic Model
  10. 10An electron in a hydrogen atom undergoes a transition from an orbit with a quantum number n i to another quantum number n f . V i and V f ar2017 (Paper 1)Bohr's Atomic Model
  11. 11Highly excited states for hydrogen like atoms (also called Rydberg states) with nuclear charge Ze are defined by their principal quantum num2016 (Paper 1)Bohr's Atomic Model
  12. 12A hydrogen atom in its ground state is irradiated by light of wavelength 970 . Taking hc/e = 1.237 10 - 6 e V m and the ground state energy 2016 (Paper 1)Atomic Spectrum
  13. 13The radius of the orbit of an electron in a Hydrogen-like atom is 4.5 a 0 , where a 0 is the Bohr radius. Its orbital angular momentum is 3 2013 (Paper 2)Bohr's Atomic Model
  14. 14The wavelength of the first spectral line in the Balmer series of hydrogen atom is . The wavelength of the second spectral line in the Balme2011 (Paper 1)Atomic Spectrum
  15. 15Paragraph: The key feature of Bohr's theory of spectrum of hydrogen atom is the quantization of angular momentum when an electron is revolvi2010 (Paper 2)Bohr's Atomic Model
  16. 16Paragraph: The key feature of Bohr's theory of spectrum of hydrogen atom is the quantization of angular momentum when an electron is revolvi2010 (Paper 2)Bohr's Atomic Model
  17. 17Paragraph: The key feature of Bohr's theory of spectrum of hydrogen atom is the quantization of angular momentum when an electron is revolvi2010 (Paper 2)Bohr's Atomic Model
  18. 18Paragraph: When a particle is restricted to move along -axis between and , where is of nanometer dimension, its energy can take only certain2009 (Paper 1)Bohr's Atomic Model
  19. 19Paragraph: When a particle is restricted to move along -axis between and , where is of nanometer dimension, its energy can take only certain2009 (Paper 1)Bohr's Atomic Model
  20. 20Paragraph: When a particle is restricted to move along -axis between and , where is of nanometer dimension, its energy can take only certain2009 (Paper 1)Bohr's Atomic Model
  21. 21Paragraph: In a mixture of gas is singly ionised atom), atoms and ions are excited to their respective first excited states. Subsequently, a2008 (Paper 1)Atomic Spectrum
  22. 22Paragraph: In a mixture of gas is singly ionised atom), atoms and ions are excited to their respective first excited states. Subsequently, a2008 (Paper 1)Atomic Spectrum
  23. 23Paragraph: In a mixture of gas is singly ionised atom), atoms and ions are excited to their respective first excited states. Subsequently, a2008 (Paper 1)Atomic Spectrum
  24. 24The largest wavelength in the ultraviolet region of the hydrogen spectrum is . The smallest wavelength in the infrared region of the hydroge2007 (Paper 1)Atomic Spectrum
  25. 25If the wavelength of the line of Lyman series is equal to the de-Broglie wavelength of electron in initial orbit of a hydrogen like element 2006Atomic Spectrum

Frequently Asked Questions

1.How many questions are available for Atomic Physics?

This chapter includes 25 questions compiled from JEE Advanced papers spanning 2006 to 2026.

2.Are these questions only from JEE Advanced, or from other exams too?

These are JEE Advanced questions specifically for the Atomic Physics chapter. Questions from other exams like JEE Main or NTA Abhyas (JEE Main) are organised separately under their respective exam sections.

3.Is Atomic Physics an important chapter for JEE Advanced Physics?

Atomic Physics has appeared in 16 of the 21 years of JEE Advanced papers covered here, with 25 questions across 17 papers - about one per paper it appears in.

4.What is the difficulty level of Atomic Physics questions in JEE Advanced?

Of the 25 questions analysed for this chapter, 16% are easy, 60% moderate and 24% tough. 2025 had the most, with 3 questions.

5.Which topics in Atomic Physics should I focus on?

These topics have carried the most weightage in Atomic Physics:

  • Bohr's Atomic Model - 15 questions (60%)
  • Atomic Spectrum - 9 questions (36%)
  • Atomic Structure - 1 question (4%)
  • Bohr's Atomic Model has produced the most tough questions (4).
6.Is Atomic Physics's weightage in JEE Advanced going up or down?

Across all 17 papers analysed, Atomic Physics has averaged about 1.5 questions per paper. In the last three years (2024–2026), that average has fallen, at about 0.8 questions per paper. Use the year-wise numbers on this page for the exact trend before you decide how much time to give it.