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Physics - Dual Nature of Matter

Practise 50 COMEDK previous year questions on Dual Nature of Matter, compiled from papers spanning 2012 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 COMEDK tests.

Dual Nature of Matter has been asked in 14 of the 15 years of COMEDK papers analysed (2012–2026), with 50 questions in all. 56% of them were easy, 40% moderate and 4% tough. Most of its questions came from 2025, with 9 questions that year. In the last three years (2024–2026) it had 21 questions across 10 papers, about 2.1 per paper.

The chapter's 2 topics are not weighted equally: Photoelectric Effect (33 questions, 66%) and Matter Waves (17 questions, 34%) have been asked the most. Photoelectric Effect has also led over the last five years, with 20 questions. Photoelectric Effect has produced the most tough questions (2).

  1. 1A monochromatic beam of photons of intensity to 1.5 and energy 11.2 eV is incident on a material of work function 4.8 eV. What is the maximu09 May, 2026 (S1)Photoelectric Effect
  2. 2What is the ratio of de Broglie wavelength of an electron to that of proton if the velocity of proton is the velocity of electron?09 May, 2026 (S1)Matter Waves
  3. 3The basic principle used behind the working of electron microscope is:09 May, 2026 (S2)Matter Waves
  4. 4The variation of the stopping potential ( ) with the frequency of incident radiation(n) is as given below. [ - threshold frequency. h- Planc09 May, 2026 (S2)Photoelectric Effect
  5. 5When metal of work function 1.4eV is exposed to a radiation, the maximum kinetic energy of the electron emitted is 0.4eV. The stopping poten09 May, 2026 (S2)Photoelectric Effect
  6. 6A plot of kinetic energy of emitted photoelectrons from a metal versus the frequency of incident radiation gives a straight line, the interc25 May, 2025 (Shift)Photoelectric Effect
  7. 7The de-Broglie wavelength of a neutron having kinetic energy 0.025 eV is . If the kinetic energy of the neutron is reduced to , its de-Brogl25 May, 2025 (Shift)Matter Waves
  8. 8A particle of mass at rest decays into masses and with non-zero velocities. The ratio of de Broglie wavelengths and of the particles is10 May, 2025 (S1)Matter Waves
  9. 9Emission of electrons from a metal plate illuminated with monochromatic electromagnetic radiation will always take place provided10 May, 2025 (S1)Photoelectric Effect
  10. 10Which of the following statement is wrong regarding the photo electric effect.10 May, 2025 (S2)Photoelectric Effect
  11. 11What is the maximum wave length of EM radiation required to move an electron from the valance band to conduction band of a semiconductor? [G10 May, 2025 (S2)Photoelectric Effect
  12. 12De Broglie wavelength associated with an electron accelerated through a potential difference ' V ' is ' '. If the accelerating potential is 10 May, 2025 (S2)Matter Waves
  13. 13A plot of kinetic energy of emitted photoelectrons from a metal versus the frequency of incident radiation gives a straight line, the interc10 May, 2025 (S3)Photoelectric Effect
  14. 14The stopping potential when a metal surface is illuminated by light of wavelength is 15 V . The stopping potential when the same surface is 10 May, 2025 (S3)Photoelectric Effect
  15. 15The velocity of an electron so that its momentum is equal to that of a photon of wavelength is2024 (Afternoon Shift)Matter Waves
  16. 16and are maximum kinetic energies of photoelectrons emitted when lights of wavelength and respectively are incident on a metallic surface. If2024 (Afternoon Shift)Photoelectric Effect
  17. 17A particle of mass has the same wavelength as a neutron moving with a velocity of . The velocity of the particle is (mass of neutron is )2024 (Evening Shift)Matter Waves
  18. 18A photon emitted during the de-excitation of electron from a state to the second excited state in a hydrogen atom, irradiates a metallic ele2024 (Evening Shift)Photoelectric Effect
  19. 19When a beam of 10.6 eV photons of intensity falls on a platinum surface of area and work function 5.6 eV . of the incident photons eject pho2024 (Memory Based)Photoelectric Effect
  20. 20The mass of a particle is double that of the particle and the kinetic energy of is th that of A then the ratio of the de- Broglie wavelength2024 (Morning Shift)Matter Waves
  21. 21The threshold frequency for a metal surface is ' '. A photo electric current ' ' is produced when it is exposed to a light of frequency and 2024 (Morning Shift)Photoelectric Effect
  22. 22A particle at rest decays in to two particles of mass and and move with velocities and . The ratio of their de Broglie wave length is:2023 (Evening Shift)Matter Waves
  23. 23In the photoelectric experiment, the frequency of the incident radiation is doubled. What will be its effect on the photoelectric current?2023 (Evening Shift)Photoelectric Effect
  24. 24When a certain metal surface is illuminated with light of frequency , the stopping potential for photoelectric current is . When the same su2023 (Memory Based)Photoelectric Effect
  25. 25Let be the maximum kinetic energy of photoelectrons emitted by light of wavelength and corresponding to wavelength . If , then2023 (Memory Based)Photoelectric Effect
  26. 26When a certain metal surface is illuminated with light of frequency , the stopping potential for photoelectric current is . When the same su2023 (Morning Shift)Photoelectric Effect
  27. 27Let be the maximum kinetic energy of photoelectrons emitted by light of wavelength and corresponding to wavelength . If , then2023 (Morning Shift)Photoelectric Effect
  28. 28Ultraviolet light of wavelength falls on a metal plate of work function . If the mass of the electron is , the de Broglie wavelength of the 2022Photoelectric Effect
  29. 29If and are maximum kinetic energies of photoelectrons emitted when lights of wavelengths and , respectively incident on a metallic surface a2022Photoelectric Effect
  30. 30The momentum of the proton is one-fourth the momentum of the electron. What is the ratio of the de-Broglie wavelength of an electron to that2021Matter Waves
  31. 31From the figure describing photoelectric effect, we may infer correctly that2021Photoelectric Effect
  32. 32Light of frequency falls on a metal surface of work function . The stopping potential of photoelectrons (in V) is2020Photoelectric Effect
  33. 33A proton accelerated through a potential has de-Broglie wavelength . Then, the de-Broglie wavelength of an -particle, when accelerated throu2020Matter Waves
  34. 34Threshold wavelength for photoelectric emission from a metal surface is . Photoelectrons will be emitted when this surface is illuminated wi2019Photoelectric Effect
  35. 35When a piece of metal is illuminated by a monochromatic light of wavelength , then stopping potential is . When same surface is illuminated 2018Photoelectric Effect
  36. 36The maximum kinetic energy of emitted electrons in a photoelectric effect does not depend upon2018Photoelectric Effect
  37. 37If an electron and a proton have the same de-Broglie wavelength, then the kinetic energy of the electron is2018Matter Waves
  38. 38The wave theory of light, in its original form, was first postulated by2017Matter Waves
  39. 39From the figure describing photoelectric effect we may infer correctly that2017Photoelectric Effect
  40. 40The energy that should be added to an electron to reduce its de-Broglie wavelength from to is2017Matter Waves
  41. 41A proton and an alpha particle are subjected to same potential difference . Their de-Broglie wavelengths will be in the ratio2016Matter Waves
  42. 42Raman shift depends on2016Photoelectric Effect
  43. 43Work function of a photosensitive metal is . The wavelength of incident radiations which can just eject photoelectrons from the metal is2016Photoelectric Effect
  44. 44The momentum of electrons having a wavelength (given, -s, is2015Matter Waves
  45. 45The photoelectric current of voltage in a certain experiment is . What is the maximum kinetic energy of photoelectrons emitted?2015Photoelectric Effect
  46. 46A body accelerates from rest with a uniform acceleration for a time . The uncertainty in is and the uncertainty in is . The uncertainty in t2015Matter Waves
  47. 47An electron is accelerated through a potential difference of . The velocity acquired by it is in )2013Photoelectric Effect
  48. 48Threshold wavelength for photoelectric emission from a metal surface is . Photoelectrons will be emitted, when this surface is illuminated w2013Photoelectric Effect
  49. 49The graph of kinetic energy of photoelectron versus frequency of incident radiation is shown for two metals and . We may definitely conclude2012Photoelectric Effect
  50. 50Photoelectric effect and Raman effect can be explained on the basis of2012Photoelectric Effect

Frequently Asked Questions

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

This chapter includes 50 questions compiled from COMEDK papers spanning 2012 to 2026.

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

These are COMEDK 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 COMEDK Physics?

Dual Nature of Matter has appeared in 14 of the 15 years of COMEDK papers covered here, with 50 questions across 23 papers - about 2 per paper it appears in.

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

Of the 50 questions analysed for this chapter, 56% are easy, 40% moderate and 4% tough. 2025 had the most, with 9 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 - 33 questions (66%)
  • Matter Waves - 17 questions (34%)
  • Photoelectric Effect has produced the most tough questions (2).
6.Is Dual Nature of Matter's weightage in COMEDK going up or down?

Across all 23 papers analysed, Dual Nature of Matter has averaged about 2.2 questions per paper. In the last three years (2024–2026), that average has stayed about the same, at about 2.1 questions per paper. Use the year-wise numbers on this page for the exact trend before you decide how much time to give it.