Physics - Atomic Physics
Practise 5 IAT (IISER) previous year questions on Atomic Physics, compiled from papers spanning 2018 to 2025. Each question is pulled directly from the actual exam paper it appeared in, so you're practising in the exact style and difficulty IAT (IISER) tests.
Atomic Physics has been asked in 4 of the 9 years of IAT (IISER) papers analysed (2017–2026), with 5 questions in all. 0% of them were easy, 80% moderate and 20% tough. Most of its questions came from 2023, with 1 question that year. In the last three years (2023–2026) it had 1 question across 3 papers, about 0.3 per paper.
All of the chapter's questions come from a single topic, Bohr's Atomic Model.
- 1An electron in the ground state (with energy ) of a hydrogen atom, absorbs a photon of energy , and gets excited to a higher energy level of2025Bohr's Atomic Model
- 2Consider the Bohr model of an atom where an electron of charge revolves around a nucleus of charge in an orbit of radius . The electron has 2023Bohr's Atomic Model
- 3An electron of mass has a speed in the Bohr orbit of a hydrogen atom. The normalized speed is given as and the mass of the electron in the u2020Bohr's Atomic Model
- 4The allowed energy levels of electrons in a Hydrogen atom are given by . For electronic transition in Hydrogen atom, what is the maximum fre2019Bohr's Atomic Model
- 5\( _2\) and \( _4\) are the wavelengths of photons required to excite the Hydrogen atom from its ground state to its second and fourth excit2018Bohr's Atomic Model
Frequently Asked Questions
1.How many questions are available for Atomic Physics?
This chapter includes 5 questions compiled from IAT (IISER) papers spanning 2018 to 2025.
2.Are these questions only from IAT (IISER), or from other exams too?
These are IAT (IISER) 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 IAT (IISER) Physics?
Atomic Physics has appeared in 5 of the 10 years of IAT (IISER) papers covered here, with 5 questions across 5 papers - about one per paper it appears in.
4.What is the difficulty level of Atomic Physics questions in IAT (IISER)?
Of the 5 questions analysed for this chapter, 0% are easy, 80% moderate and 20% tough. 2023 had the most, with 1 question.
5.Which topics in Atomic Physics should I focus on?
All of this chapter's questions come from a single topic: Bohr's Atomic Model.
6.Is Atomic Physics's weightage in IAT (IISER) going up or down?
Across all 5 papers analysed, Atomic Physics has averaged about 1.0 questions per paper. In the last three years (2023–2026), that average has fallen, at about 0.3 questions per paper. Use the year-wise numbers on this page for the exact trend before you decide how much time to give it.