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Physics - Dual Nature of Matter

Practise 114 AP EAMCET previous year questions on Dual Nature of Matter, compiled from papers spanning 2001 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 AP EAMCET tests.

Dual Nature of Matter has been asked in 22 of the 24 years of AP EAMCET papers analysed (2001–2024), with 114 questions in all. 46% of them were easy, 38% moderate and 16% tough. Most of its questions came from 2022, with 14 questions that year. In the last three years (2022–2024) it had 36 questions across 28 papers, about 1.3 per paper.

The chapter's 2 topics are not weighted equally: Photoelectric Effect (84 questions, 74%) and Matter Waves (30 questions, 26%) have been asked the most. Photoelectric Effect has also led over the last five years, with 42 questions. Photoelectric Effect has produced the most tough questions (13).

  1. 1The de Broglie wavelength associated with an electron accelerated through a potential difference of is nearly27 May, 2025 (M)Matter Waves
  2. 2When photons of energy incident on a photosensitive material, the de Broglie wavelength of the photoelectrons emitted with maximum kinetic e26 May, 2025 (M)Photoelectric Effect
  3. 3The ratio of de Broglie wavelengths associated with thermal neutrons at temperatures and is26 May, 2025 (E)Matter Waves
  4. 4A laser produces a beam of light of frequency with an output power of 33 mW. The average number of photons emitted by the laser per second i24 May, 2025 (M)Photoelectric Effect
  5. 5If a proton and an alpha particle are accelerated through the same potential difference, then the ratio of their de Broglie wavelengths is23 May, 2025 (M)Matter Waves
  6. 6If the de Broglie wavelength of an electron is 2 nm, then its kinetic energy is nearly (Planck's constant and mass of electron )23 May, 2025 (E)Matter Waves
  7. 7If the threshold wavelength of light for photoelectric emission to take place from a metal surface is , then the work function of the metal 22 May, 2025 (E)Photoelectric Effect
  8. 8If the linear momentum of a proton is changed by , then the de Broglie wavelength associated with the proton changes by . Then the initial l21 May, 2025 (M)Matter Waves
  9. 9If an electron in the excited state falls to ground state, a photon of energy 5 eV is emitted, then the wavelength of the photon is nearly21 May, 2025 (M)Photoelectric Effect
  10. 10A particle of mass in motion collides with another stationary particle of mass . If the collision is perfectly elastic and one dimensional, 21 May, 2025 (E)Matter Waves
  11. 11A photon incident on a metal of work function 2 eV produced photo electron of maximum kinetic energy of 2 eV . The wavelength associated wit23 May, 2024 (M)Photoelectric Effect
  12. 12The surface of a metal is first illuminated with a light of wavelength 300 nm and later illuminated by another light of wavelength 500 nm . 22 May, 2024 (M)Photoelectric Effect
  13. 13The radiation of energy ' ' falls normally on a perfectly reflecting surface. The momentum transferred to the surface is22 May, 2024 (E)Matter Waves
  14. 14Light of wavelength is incident on a sodium surface for which the threshold wavelength of photo electrons is . The work function of sodium i22 May, 2024 (E)Photoelectric Effect
  15. 15A blue lamp emits light of mean wavelength . The lamp is rated at 150 W and efficiency. Then the number of photons are emitted by the lamp p21 May, 2024 (M)Photoelectric Effect
  16. 16The maximum wavelength of light which causes photoelectric emission from a photosensitive metal surface is . Two light beams of wavelengths 21 May, 2024 (E)Photoelectric Effect
  17. 17A transmitter of power 10 kW emits radio waves of wavelength 500 m . The number of photons emitted per second by the transmitter is of the o21 May, 2024 (E)Photoelectric Effect
  18. 18An electron of mass ' ' with initial velocity enters in an electric field is constant at . If is its de-Brogli wavelength initially, then th20 May, 2024 (M)Matter Waves
  19. 19If the kinetic energy of a particle in motion is decreased by , the increase in de Broglie wavelength of the particle is20 May, 2024 (E)Matter Waves
  20. 20The longest wavelength of light that can initiate photo electric effect in the metal of work function 9 eV is19 May, 2024 (E)Photoelectric Effect
  21. 21Energy required to remove an electron from aluminum surface is 4.2 eV . If light of wavelength falls on the surface, the velocity of the fas18 May, 2024 (M)Photoelectric Effect
  22. 22Electromagnetic waves of energy flux incidents normally on a surface of area . If absorbs the surface the flux completely, the total momentu19 May, 2023 (M)Photoelectric Effect
  23. 23The de Broglie wavelength of a charged particle accelerated through a potential difference is . If the potential difference is increased by 19 May, 2023 (M)Matter Waves
  24. 24Photoelectrons are emitted with maximum velocity when light of frequency incidents on a photosensitive material of work function . If the fr18 May, 2023 (M)Photoelectric Effect
  25. 25The threshold wavelength of a photosensitive material is equal to the frequency of line of hydrogen. If a photon whose frequency equal to th18 May, 2023 (E)Photoelectric Effect
  26. 26When light of wavelength incidents on a photosensitive material, photoelectrons are emitted. If the wavelength of the incident light is redu17 May, 2023 (M)Photoelectric Effect
  27. 27In a photoelectric experiment, a graph is drawn with stopping potential along -axis and the frequency of the incident light along -axis. If 17 May, 2023 (E)Photoelectric Effect
  28. 28The particle having zero mass is17 May, 2023 (E)Photoelectric Effect
  29. 29The maximum kinetic energy of the emitted photoelectrons from a photosensitive material of work function , when light of frequency ' ' incid16 May, 2023 (M)Photoelectric Effect
  30. 30The threshold frequency of a photosensitive material is . When photons of frequency incident on the material, photoelectrons are emitted wit16 May, 2023 (E)Photoelectric Effect
  31. 31The velocity of a particle is 3 times the velocity of proton. If the ratio of the de Broglie wavelengths of the particle and the proton is 315 May, 2023 (M)Matter Waves
  32. 32The de Broglie wavelength of the most energetic photoelectrons emitted from a photosensitive metal of work function , when light frequency i15 May, 2023 (E)Photoelectric Effect
  33. 33Two light waves of wavelengths and incident on a metal surface. The maximum velocity of photoelectrons produced due to one wavelength is of 08 Jul, 2022 (M)Photoelectric Effect
  34. 34Light falls on a non-reflecting surface normally. If the average force exerted on a surface with area during 20 minute time interval is , th08 Jul, 2022 (E)Photoelectric Effect
  35. 35A metal has work function . If a radiation of frequency is incident on this metal surface, then the maximum kinetic energy of ejected photoe08 Jul, 2022 (E)Photoelectric Effect
  36. 36A bulb of power radiates uniformly in all directions. The pressure exerted by the radiation on the surface at a distance of is07 Jul, 2022 (M)Photoelectric Effect
  37. 37The average number of photons emitted per second by a laser of power producing a light of wavelength is (Planck's constant, )07 Jul, 2022 (M)Photoelectric Effect
  38. 38A particle of mass and electric change has de-Broglie wavelength . Then kinetic energy of this particle is (Planck's constant, )07 Jul, 2022 (E)Matter Waves
  39. 39The radiation pressure away from a electric bulb is06 Jul, 2022 (M)Photoelectric Effect
  40. 40A radiation of falls on a metal surface to produce photo electrons. These electrons are made to enter a magnetic field of . If the radius of06 Jul, 2022 (M)Photoelectric Effect
  41. 41The electric field associated with a mono chromatic light wave is given by then the stopping potential when this light is used in a photoele06 Jul, 2022 (E)Photoelectric Effect
  42. 42The following statement is correct in the case of photoelectric effect05 Jul, 2022 (M)Photoelectric Effect
  43. 43A particle of mass has de-Broglie wavelength of . The kinetic energy of this particle is (Plank's Constant05 Jul, 2022 (E)Matter Waves
  44. 44A beam of light with intensity 10 - 3 N m - 2 and cross sectional area 20 cm 2 is incident on a fully reflective surface at angle 45 . Then 04 Jul, 2022 (M)Photoelectric Effect
  45. 45The metal which has the highest work function in the following is04 Jul, 2022 (M)Photoelectric Effect
  46. 46In a photoelectric experiment light of wavelength 800 nm produces photoelectrons with the smallest de Broglie wavelength of 1 nm . Then the 04 Jul, 2022 (E)Photoelectric Effect
  47. 47When a light of wavelength falls on a photosensitive metal, a negative potential is required to stop the emitted electrons. Then, the work-f25 Aug, 2021 (M)Photoelectric Effect
  48. 48The study of photoelectric effect is useful in understanding24 Aug, 2021 (M)Photoelectric Effect
  49. 49Photo cells convert24 Aug, 2021 (E)Photoelectric Effect
  50. 50Assertion (A) Electromagnetic waves exert pressure, called radiation pressure. Reason (R) This is because they carry energy.23 Aug, 2021 (E)Photoelectric Effect

Frequently Asked Questions

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

This chapter includes 114 questions compiled from AP EAMCET papers spanning 2001 to 2025.

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

These are AP EAMCET 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 AP EAMCET Physics?

Dual Nature of Matter has appeared in 23 of the 25 years of AP EAMCET papers covered here, with 114 questions across 87 papers - about one per paper it appears in.

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

Of the 114 questions analysed for this chapter, 46% are easy, 38% moderate and 16% tough. 2022 had the most, with 14 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 - 84 questions (74%)
  • Matter Waves - 30 questions (26%)
  • Photoelectric Effect has produced the most tough questions (13).
6.Is Dual Nature of Matter's weightage in AP EAMCET going up or down?

Across all 87 papers analysed, Dual Nature of Matter has averaged about 1.3 questions per paper. In the last three years (2022–2024), that average has stayed about the same, at about 1.3 questions per paper. Use the year-wise numbers on this page for the exact trend before you decide how much time to give it.