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Physics - Dual Nature of Matter

Practise 20 JEE Advanced previous year questions on Dual Nature of Matter, compiled from papers spanning 2006 to 2023. 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.

Dual Nature of Matter has been asked in 16 of the 27 years of JEE Advanced papers analysed (2000–2026), with 20 questions in all. 25% of them were easy, 65% moderate and 10% tough. Most of its questions came from 2015, with 3 questions that year. In the last three years (2024–2026) it had 0 questions across 6 papers, about 0 per paper.

The chapter's 2 topics are not weighted equally: Photoelectric Effect (15 questions, 75%) and Matter Waves (5 questions, 25%) have been asked the most. Photoelectric Effect has also led over the last five years, with 2 questions. Photoelectric Effect has produced the most tough questions (1).

  1. 1A Hydrogen-like atom has atomic number Z . Photons emitted in the electronic transitions from level n = 4 to level n = 3 in these atoms are 2023 (Paper 1)Photoelectric Effect
  2. 2When light of a given wavelength is incident on a metallic surface, the minimum potential needed to stop the emitted photoelectrons is 6 . 02022 (Paper 2)Photoelectric Effect
  3. 3In a photoemission experiment, the maximum kinetic energies of photoelectrons from metals P , Q and R are E P , E Q and E R , respectively, 2021 (Paper 2)Photoelectric Effect
  4. 4A perfectly reflecting mirror of mass M mounted on a spring constitutes a spring-mass system of angular frequency Ω such that 4 π M Ω h = 102019 (Paper 2)Photoelectric Effect
  5. 5In a photoelectric experiment, a parallel beam of monochromatic light with the power of 200 W is incident on a perfectly absorbing cathode o2018 (Paper 2)Photoelectric Effect
  6. 6A photoelectric material having work-function ϕ 0 is illuminated with a light of wavelength λ λ h c ϕ 0 . The fastest photoelectron has a de2017 (Paper 2)Matter Waves
  7. 7In a historical experiment to determine Planck s constant, a metal surface was irradiated with light of different wavelengths. The emitted p2016 (Paper 1)Photoelectric Effect
  8. 8Light of wavelength λ p h falls on a cathode plate inside a vacuum tube as shown in the figure. The work function of the cathode surface is 2016 (Paper 2)Photoelectric Effect
  9. 9Consider a hydrogen atom with its electron in the n t h orbital. An electromagnetic radiation of wavelength 90 nm is used to ionize the atom2015 (Paper 1)Photoelectric Effect
  10. 10For photo-electric effect with incident photon wavelength , the stopping potential is V 0 . Identify the correct variation(s) of V 0 with an2015 (Paper 1)Photoelectric Effect
  11. 11An electron in an excited state of L i 2 + ion has angular momentum 3 h 2 . The de Broglie wavelength of the electron in this state is p 0 (2015 (Paper 2)Matter Waves
  12. 12A metal surface is illuminated by light of two different wavelengths 248 nm and 310 nm. The maximum speeds of the photoelectrons correspondi2014 (Paper 2)Photoelectric Effect
  13. 13A pulse of light of duration 100 ns is absorbed completely by a small object initially at rest. Power of the pulse is 30 mW and the speed of2013 (Paper 1)Photoelectric Effect
  14. 14The work functions of silver and sodium are 4.6 and 2.3 eV, respectively. The ratio of the slope of the stopping potential versus frequency 2013 (Paper 1)Photoelectric Effect
  15. 15A proton is fired from very far away towards a nucleus with charge , where is the electronic charge. It makes a closest approach of to the n2012 (Paper 1)Matter Waves
  16. 16A silver sphere of radius and work function is suspended from an insulating thread in free-space. It is under continuous illumination of wav2011 (Paper 2)Photoelectric Effect
  17. 17An -particle and a proton are accelerated from rest by a potential difference of . After this, their de Broglie wavelengths are and respecti2010 (Paper 1)Matter Waves
  18. 18Photoelectric effect experiments are performed using three different metal plates and having work functions and , respectively. A light beam2009 (Paper 2)Photoelectric Effect
  19. 19Electrons with de-Broglie wavelength fall on the target in an X-ray tube. The cut-off wavelength of the emitted X-rays is2007 (Paper 2)Matter Waves
  20. 20The graph between and stopping potential of three metals having work function and in an experiment of photoelectric effect is plotted as sho2006Photoelectric Effect

Frequently Asked Questions

1.How many questions are available for Dual Nature of Matter?

This chapter includes 20 questions compiled from JEE Advanced papers spanning 2006 to 2023.

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

These are JEE Advanced 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 JEE Advanced Physics?

Dual Nature of Matter has appeared in 16 of the 21 years of JEE Advanced papers covered here, with 20 questions across 18 papers - about one per paper it appears in.

4.What is the difficulty level of Dual Nature of Matter questions in JEE Advanced?

Of the 20 questions analysed for this chapter, 25% are easy, 65% moderate and 10% tough. 2015 had the most, with 3 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 - 15 questions (75%)
  • Matter Waves - 5 questions (25%)
  • Photoelectric Effect has produced the most tough questions (1).
6.Is Dual Nature of Matter's weightage in JEE Advanced going up or down?

Across all 18 papers analysed, Dual Nature of Matter has averaged about 1.1 questions per paper. In the last three years (2024–2026), that average has fallen, at about 0.0 questions per paper. Use the year-wise numbers on this page for the exact trend before you decide how much time to give it.