Jump to a section

Physics - Atomic Physics

Practise 19 WBJEE previous year questions on Atomic Physics, compiled from papers spanning 2009 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 WBJEE tests.

Atomic Physics has been asked in 15 of the 18 years of WBJEE papers analysed (2009–2026), with 19 questions in all. 42% of them were easy, 47% moderate and 11% tough. Most of its questions came from 2025, with 2 questions that year. In the last three years (2024–2026) it had 3 questions across 3 papers, about 1 per paper.

The chapter's 3 topics are not weighted equally: Bohr's Atomic Model (15 questions, 79%), Atomic Spectrum (3 questions, 16%), and Atomic Structure (1 question, 5%) have been asked the most. Bohr's Atomic Model has also led over the last five years, with 5 questions. Bohr's Atomic Model has produced the most tough questions (2).

  1. 1The de-Broglie wavelength of an electron in 4th orbit is (where = radius of the 1st orbit)2026Bohr's Atomic Model
  2. 2An electron in Hydrogen atom jumps from the second Bohr orbit to the ground state and the difference between the energies of the two states 2025Bohr's Atomic Model
  3. 3The minimum wavelength of Lyman series lines is , then the maximum wavelength of these lines is2025Atomic Spectrum
  4. 4If the potential energy of a hydrogen atom in the first excited state is assumed to be zero, then the total energy of \(n\) \(= \) state is,2023Bohr's Atomic Model
  5. 5Supose in a hypothetical world the angular momentum is quantized to be even integral multiples of . The largest possible wavelength emitted 2022Bohr's Atomic Model
  6. 6A sample of hydrogen atom in its ground state is radiated with photons of energies. The radiation from the sample is absorbed by excited ion2022Bohr's Atomic Model
  7. 7Let be the radius of orbit, speed of electron and total energy of electron respectively in a -atom. Which of the following quantities accord2021Bohr's Atomic Model
  8. 8A ev electron beam is used to bombard gaseous hydrogen at ground state. The energy level upto which the hydrogen atoms would be excited is2021Bohr's Atomic Model
  9. 9If is the Rydberg Constant in , then hydrogen atom does not emit any radiation of wave-length in the range of2020Atomic Spectrum
  10. 10To which of the following the angular velocity of the electron in the -th Bohr orbit is proportional?2019Bohr's Atomic Model
  11. 11How the linear velocity of an electron in the Bohr orbit is related to its quantum number2018Bohr's Atomic Model
  12. 12Let and be the respective speed and energy of an electron in the th orbit of radius , in a hydrogen atom, as predicted by Bohr's model. Then2017Bohr's Atomic Model
  13. 13The number of de-Broglie wavelengths contained in the second Bohr orbit of hydrogen atom is2016Bohr's Atomic Model
  14. 14The wavelength of second Balmer line in hydrogen &spectrum is 600 nm The wavelength for its third line in Lyman series is2016Bohr's Atomic Model
  15. 15The ionization energy of hydrogen is . The energy of the photon released when an electron jumps from the first excited state to the ground s2014Atomic Structure
  16. 16The ionization energy of the hydrogen atom is 13.6 eV. The potential energy of the electron in state of hydrogen atom is2013Bohr's Atomic Model
  17. 17Two elements and with atomic numbers and are used to produce characteristic X-rays with frequencies and respectively. If then will be2012Bohr's Atomic Model
  18. 18In an inelastic collision an electron excites as hydrogen atom from its ground state to a M-shell state. A second electron collides instanta2011Bohr's Atomic Model
  19. 19If the electron in a hydrogen atom jumps from an orbit with level to an orbit with level the emitted radiation has a wavelength given by2009Atomic Spectrum

Frequently Asked Questions

1.How many questions are available for Atomic Physics?

This chapter includes 19 questions compiled from WBJEE papers spanning 2009 to 2026.

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

These are WBJEE 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 WBJEE Physics?

Atomic Physics has appeared in 15 of the 18 years of WBJEE papers covered here, with 19 questions across 15 papers - about one per paper it appears in.

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

Of the 19 questions analysed for this chapter, 42% are easy, 47% moderate and 11% tough. 2025 had the most, with 2 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 (79%)
  • Atomic Spectrum - 3 questions (16%)
  • Atomic Structure - 1 question (5%)
  • Bohr's Atomic Model has produced the most tough questions (2).
6.Is Atomic Physics's weightage in WBJEE going up or down?

Across all 15 papers analysed, Atomic Physics has averaged about 1.3 questions per paper. In the last three years (2024–2026), that average has fallen, at about 1.0 questions per paper. Use the year-wise numbers on this page for the exact trend before you decide how much time to give it.