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Physics - Dual Nature of Matter

Practise 51 AIIMS previous year questions on Dual Nature of Matter, compiled from papers spanning 2001 to 2019. Each question is pulled directly from the actual exam paper it appeared in, so you're practising in the exact style and difficulty AIIMS tests.

Dual Nature of Matter has been asked in 19 of the 19 years of AIIMS papers analysed (2001–2019), with 51 questions in all. 55% of them were easy, 29% moderate and 16% tough. Most of its questions came from 2019, with 7 questions that year. In the last three years (2017–2019) it had 15 questions across 5 papers, about 3 per paper.

The chapter's 3 topics are not weighted equally: Photoelectric Effect (32 questions, 63%), Matter Waves (18 questions, 35%), and Davison and Germer Experiment (1 question, 2%) have been asked the most. Photoelectric Effect has produced the most tough questions (7).

  1. 1The energy flux of sunlight reaching the surface of the earth is . How many photons (nearly) per square metre are incident on the earth per 26 May, 2019Photoelectric Effect
  2. 2When light of wavelength is incident on a photosensitive surface, the stopping potential is . When light of wavelength is incident on same s26 May, 2019Photoelectric Effect
  3. 3Assertion : A photon has no rest mass, yet it carries definite momentum. Reason : Momentum of photon is due to its energy and hence its equi26 May, 2019Photoelectric Effect
  4. 4Assertion : Work function of aluminium is . Emission of electrons will not be possible if two photons, each of energy , strike an electron o26 May, 2019Photoelectric Effect
  5. 5The maximum velocities of the photoelectrons ejected are and for the incident light of wavelength and on a metal surface respectively. The w25 May, 2019Photoelectric Effect
  6. 6The potential difference required for accelerating an electron to have the de Broglie wavelength of is25 May, 2019Matter Waves
  7. 7Assertion: The relative velocity of two photons travelling in opposite direction is the velocity of light. Reason : The rest mass of photon 25 May, 2019Matter Waves
  8. 8A deutron has an energy of when accelerated through a potential difference . What will be the energy of an -particle accelerated by source ?27 May, 2018Matter Waves
  9. 9An electron moving with speed has wavelength and another electron moving with speed has wavelength , find . ( mass of electron)27 May, 2018Matter Waves
  10. 10Maximum velocity of the photoelectron emitted by a metal is . Take the value of specific charge of the electron is . Then the stopping poten27 May, 2018Photoelectric Effect
  11. 11Assertion : The de Broglie wavelength of a molecule varies inversely as the square root of temperature. Reason : The root mean square veloci27 May, 2018Matter Waves
  12. 12If the maximum kinetic energy of emitted photo electrons from a metal surface of work function , is . If wavelength of incident radiation is26 May, 2018Photoelectric Effect
  13. 13Assertion : Photoelectric effect demonstrates the wave nature of light. Reason: The number of photoelectrons is proportional to the frequenc26 May, 2018Photoelectric Effect
  14. 14Light of two different frequencies whose photons have energies and respectively, successively illuminate a metallic surface whose work funct2017Photoelectric Effect
  15. 15Assertion : As work function of a material increases by some mechanism, it requires greater energy to excite the electrons from its surface.2017Photoelectric Effect
  16. 16Which of the following has the longest de Broglie wavelength if they are moving with the same velocity?2016Matter Waves
  17. 17Assertion : When a certain wavelength of light fall on a metal surface it ejects electron. Reason : Light has wave nature.2016Photoelectric Effect
  18. 18de-Broglie wavelength associated with a ball of mass having kinetic energy is2015Matter Waves
  19. 19Photoelectric effect supports quantum nature of light because2015Photoelectric Effect
  20. 20The light of wavelength falls on a photosensitive substance whose work function is . Its stopping potential is2014Photoelectric Effect
  21. 21Assertion: An electron microscope is based on de Broglie hypothesis. Reason: A beam of electrons behaves as a wave which can be converged by2014Matter Waves
  22. 22If velocity of a particle is three times of that of electron and ratio of de Broglie wavelength of particle to that of electron is . The par2013Matter Waves
  23. 23A photon is incident having frequency . Threshold frequency of metal is . Find the kinetic energy of the ejected electron.2012Photoelectric Effect
  24. 24Calculate the kinetic energy of the electron having wavelength .2012Matter Waves
  25. 25If we assume kinetic energy of a proton is equal to energy of the photon, the ratio of de Broglie wavelength of proton to photon is proporti2011Photoelectric Effect
  26. 26Assertion : There is a physical significance of matter waves. Reason : Both interference and diffraction occurs in it.2011Matter Waves
  27. 27Whenever a stream of electrons collides with a stream of photons, in this collision, which of the following is not conserved?2010Photoelectric Effect
  28. 28If and are maximum kinetic energies of photoelectrons emitted when lights of wavelengths and respectively incident on a metallic surface. If2010Photoelectric Effect
  29. 29Assertion : The de Broglie equation has significance for any microscopic or submicroscopic particles. Reason : The de Broglie wavelengs inve2010Matter Waves
  30. 30de Broglie wavelength associated with neutrons is related with absolute temperature as2009Matter Waves
  31. 31If the kinetic energy of a particle is increased by 16 times, the percentage change in the de Broglie wavelength of the particle is2009Matter Waves
  32. 32Assertion : A photon has no rest mass, yet it carries definite momentum. Reason : Momemtum of photon is due to its energy and hence its equi2009Photoelectric Effect
  33. 33A laser beam is used for carrying out surgery because, it2008Photoelectric Effect
  34. 34Which of the following is matched wrongly?2008Matter Waves
  35. 35Assertion: Stopping potential depends upon the frequency of incident light but is independent of the intensity of the light. Reason : The ma2008Photoelectric Effect
  36. 36What is the energy of photon whose wavelength is \(6840 Å\) ?2007Photoelectric Effect
  37. 37In photoelectric effect, the electrons are ejected from metals if the incident light has a certain minimum2006Photoelectric Effect
  38. 38Assertion: The photoelectrons produced by a monochromatic light beam incident on a metal surface, have a spread in their kinetic energies. R2006Photoelectric Effect
  39. 39The pressure exerted by an electromagnetic wave of intensity (watt ) on a nonreflecting surface is [ is the velocity of light]2005Photoelectric Effect
  40. 40Assertion : The energy and momentum of a photon are related by . Reason : The photon behaves like a particle.2005Photoelectric Effect
  41. 41A photon of energy is incident on a metal surface whose work function is . The minimum reverse potential to be applied for stopping the emis2004Photoelectric Effect
  42. 42Assertion : Photoelectric effect demonstrates the wave nature of light. Reason : The number of photoelectrons is proportional to the frequen2004Photoelectric Effect
  43. 43A laser beam is used for carrying out surgery because it2003Matter Waves
  44. 44A proton is about 1840 times heavier than an electron. When it is accelerated by a potential difference of , its kinetic energy will be2003Photoelectric Effect
  45. 45If an electron and a photon propagate in the form of waves having the same wavelength, it implies that they have the same2003Matter Waves
  46. 46Assertion : A beam of charged particles is employed in the treatment of cancer. Reason : Charged particles on passing through a material med2003Photoelectric Effect
  47. 47The speed of an electron having a wavelength of is2002Matter Waves
  48. 48Mass of the proton is 1840 times that of electron. It is accelerated through a potential difference of . Find its kinetic energy.2001Davison and Germer Experiment
  49. 49The work function of a metal is . If the frequency of incident radiation is increased to twice, then the work function of the metal becomes2001Photoelectric Effect
  50. 50In Planck's oscillator energy is given as If , then energy would be2001Photoelectric Effect

Frequently Asked Questions

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

This chapter includes 51 questions compiled from AIIMS papers spanning 2001 to 2019.

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

These are AIIMS questions specifically for the Dual Nature of Matter chapter. Questions from other exams like NEET or JIPMER are organised separately under their respective exam sections.

3.Is Dual Nature of Matter an important chapter for AIIMS Physics?

Dual Nature of Matter has appeared in 19 of the 19 years of AIIMS papers covered here, with 51 questions across 21 papers - about 2 per paper it appears in.

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

Of the 51 questions analysed for this chapter, 55% are easy, 29% moderate and 16% tough. 2019 had the most, with 7 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 - 32 questions (63%)
  • Matter Waves - 18 questions (35%)
  • Davison and Germer Experiment - 1 question (2%)
  • Photoelectric Effect has produced the most tough questions (7).
6.Is Dual Nature of Matter's weightage in AIIMS going up or down?

Across all 21 papers analysed, Dual Nature of Matter has averaged about 2.4 questions per paper. In the last three years (2017–2019), that average has risen, at about 3.0 questions per paper. Use the year-wise numbers on this page for the exact trend before you decide how much time to give it.