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Physics - Atomic Physics

Practise 16 NEST (NISER) previous year questions on Atomic Physics, compiled from papers spanning 2011 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 NEST (NISER) tests.

Atomic Physics has been asked in 9 of the 16 years of NEST (NISER) papers analysed (2011–2026), with 16 questions in all. 6% of them were easy, 75% moderate and 19% tough. Most of its questions came from 2024, with 5 questions that year. In the last three years (2024–2026) it had 6 questions across 4 papers, about 1.5 per paper.

The chapter's 3 topics are not weighted equally: Bohr's Atomic Model (14 questions, 88%), Atomic Spectrum (1 question, 6%), and Atomic Models (1 question, 6%) have been asked the most. Bohr's Atomic Model has also led over the last five years, with 8 questions. Bohr's Atomic Model has produced the most tough questions (3).

  1. 1The electron in the hydrogen atom is in the third excited state. Its potential energy (in eV) is2026Bohr's Atomic Model
  2. 2A muon has same charge as the electron and its mass is about 200 times larger than electron mass. It decays in seconds. A muonic hydrogen at2024 (Session 1)Bohr's Atomic Model
  3. 3Select the correct statement regarding the Thompson and Rutherford models of the atom.2024 (Session 1)Atomic Models
  4. 4The Balmer series of hydrogenic spectral lines refers to an electron transitioning from to where is the principal quantum number. A hydrogen2024 (Session 1)Bohr's Atomic Model
  5. 5In a sequence of two consecutive steps, a hydrogen atom in its ground state absorbs two photons and finally reaches its excited state. The e2024 (Session 2)Bohr's Atomic Model
  6. 6Assuming that the Bohr's theory applies and the number of protons and neutrons in the nucleus is approximately same, the maximum atomic numb2024 (Session 2)Bohr's Atomic Model
  7. 7Consider the Bohr model of the hydrogen atom with Bohr radius . If the mass of the electron and that of the proton become twice the present 2023 (Session 1)Bohr's Atomic Model
  8. 8Consider the Bohr model of the hydrogen atom. Suppose that the charge of the proton were 1.1 . while the electron charge continued to be but2023 (Session 2)Bohr's Atomic Model
  9. 9Planck had proposed that the oscillator energy is directly proportional to , a positive integer. We assume that this also holds for the ener2022 (Session 1)Bohr's Atomic Model
  10. 10Consider an atomic species of atomic number and consisting of three electrons which are orbiting equally spaced in the same circular orbit. 2021 (Session 1)Bohr's Atomic Model
  11. 11The figure shows the emission spectra recorded for three different light sources a, b and c using a spectrometer (note that the intensities 2020 (Session 1)Atomic Spectrum
  12. 12An element of atomic number is in the ionized hydrogenic ground state. The largest wavelength that can convert it to a fully ionized state i2020 (Session 1)Bohr's Atomic Model
  13. 13The speed, frequency of revolution and the radius of the electron in the orbital in the Bohr model are denoted by and , respectively. Let be2019 (Session 1)Bohr's Atomic Model
  14. 14A particle is moving in a circular orbit of radius under the influence of an attractive central force. Assume the Bohr quantization conditio2019 (Session 2)Bohr's Atomic Model
  15. 15Consider a 3-level system with energies and in ascending order. and are the wavelengths of radiation corresponding to the transitions and re2012Bohr's Atomic Model
  16. 16The electron in the ion is replaced by a meson which has the same charge as the electron. Such an ion is called a mesic ion. Let be the bind2011Bohr's Atomic Model

Frequently Asked Questions

1.How many questions are available for Atomic Physics?

This chapter includes 16 questions compiled from NEST (NISER) papers spanning 2011 to 2026.

2.Are these questions only from NEST (NISER), or from other exams too?

These are NEST (NISER) 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 NEST (NISER) Physics?

Atomic Physics has appeared in 9 of the 16 years of NEST (NISER) papers covered here, with 16 questions across 12 papers - about one per paper it appears in.

4.What is the difficulty level of Atomic Physics questions in NEST (NISER)?

Of the 16 questions analysed for this chapter, 6% are easy, 75% moderate and 19% tough. 2024 had the most, with 5 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 - 14 questions (88%)
  • Atomic Spectrum - 1 question (6%)
  • Atomic Models - 1 question (6%)
  • Bohr's Atomic Model has produced the most tough questions (3).
6.Is Atomic Physics's weightage in NEST (NISER) going up or down?

Across all 12 papers analysed, Atomic Physics has averaged about 1.3 questions per paper. In the last three years (2024–2026), that average has stayed about the same, at about 1.5 questions per paper. Use the year-wise numbers on this page for the exact trend before you decide how much time to give it.