Physics - Dual Nature of Matter
Practise 8 IAT (IISER) previous year questions on Dual Nature of Matter, compiled from papers spanning 2019 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 IAT (IISER) tests.
Dual Nature of Matter has been asked in 6 of the 9 years of IAT (IISER) papers analysed (2017–2026), with 8 questions in all. 13% of them were easy, 88% moderate and 0% tough. Most of its questions came from 2026, with 2 questions that year. In the last three years (2023–2026) it had 3 questions across 3 papers, about 1 per paper.
The chapter's 2 topics are not weighted equally: Photoelectric Effect (6 questions, 75%) and Matter Waves (2 questions, 25%) have been asked the most. Photoelectric Effect has also led over the last five years, with 4 questions.
- 1Consider normal incidence of a monochromatic beam of photons of power on a flat surface. Of the incident beam, 10% gets absorbed, 10% gets t2026Photoelectric Effect
- 2An experimental study of the photoelectric effect involves a metal of work function . What is the smallest wavelength of the incident photon2026Photoelectric Effect
- 3A particle of mass and charge is accelerated through a distance by an electric field . Another particle of mass and charge is accelerated by2025Matter Waves
- 4Two monochromatic sources emit light at wavelengths and . The stopping potentials for a photosensitive material using these two sources are 2024Photoelectric Effect
- 5The figures in the options show the photocurrent of a photoelectric material versus the frequency of an incident light beam. The light beam 2022Photoelectric Effect
- 6In an experiment on the photoelectric effect, the de Broglie wavelength of the emitted electron is . The energy of the photon incident on th2021Photoelectric Effect
- 7In the photoelectric effect experiment, the frequency of the incident light is changed from red to blue while keeping the energy per unit ar2020Photoelectric Effect
- 8Neutral gas molecules, each of mass , are at a temperature in a container at zero gravity. How does the average de Broglie wavelength of a m2019Matter Waves
Frequently Asked Questions
1.How many questions are available for Dual Nature of Matter?
This chapter includes 8 questions compiled from IAT (IISER) papers spanning 2019 to 2026.
2.Are these questions only from IAT (IISER), or from other exams too?
These are IAT (IISER) questions specifically for the Dual Nature of Matter chapter. Questions from other exams like JEE Main or NTA Abhyas (JEE Main) are organised separately under their respective exam sections.
3.Is Dual Nature of Matter an important chapter for IAT (IISER) Physics?
Dual Nature of Matter has appeared in 7 of the 10 years of IAT (IISER) papers covered here, with 8 questions across 7 papers - about one per paper it appears in.
4.What is the difficulty level of Dual Nature of Matter questions in IAT (IISER)?
Of the 8 questions analysed for this chapter, 13% are easy, 88% moderate and 0% tough. 2026 had the most, with 2 questions.
5.Which topics in Dual Nature of Matter should I focus on?
These topics have carried the most weightage in Dual Nature of Matter:
- Photoelectric Effect - 6 questions (75%)
- Matter Waves - 2 questions (25%)
6.Is Dual Nature of Matter's weightage in IAT (IISER) going up or down?
Across all 7 papers analysed, Dual Nature of Matter has averaged about 1.1 questions per paper. In the last three years (2023–2026), that average has stayed about the same, 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.