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Physics - Dual Nature of Matter

Practise 29 BITSAT previous year questions on Dual Nature of Matter, compiled from papers spanning 2009 to 2024. Each question is pulled directly from the actual exam paper it appeared in, so you're practising in the exact style and difficulty BITSAT tests.

Dual Nature of Matter has been asked in 15 of the 16 years of BITSAT papers analysed (2009–2024), with 29 questions in all. 38% of them were easy, 45% moderate and 17% tough. Most of its questions came from 2024, with 4 questions that year. In the last three years (2022–2024) it had 8 questions across 5 papers, about 1.6 per paper.

The chapter's 2 topics are not weighted equally: Photoelectric Effect (22 questions, 76%) and Matter Waves (7 questions, 24%) have been asked the most. Photoelectric Effect has also led over the last five years, with 9 questions. Photoelectric Effect has produced the most tough questions (4).

  1. 1When light is incident on a metal surface the maximum kinetic energy of emitted electrons2024 (Memory Based Paper 1)Photoelectric Effect
  2. 2If the kinetic energy of a free electron doubles, it's de-Broglie wavelength changes by the factor2024 (Memory Based Paper 1)Photoelectric Effect
  3. 3Which figure shows the correct variation of applied potential difference (V) with photoelectric current (I) at two different intensities of 2024 (Memory Based Paper 2)Photoelectric Effect
  4. 4The acceptor level of a p-type semiconductor is 6 eV . The maximum wavelength of light which can create a hole would be : Given hc nm .2024 (Memory Based Paper 2)Photoelectric Effect
  5. 5Proton (p) and electron (e) will have same deBroglie wavelength when the ratio of their momentum is (assume, )2023 (Memory Based Paper 1)Matter Waves
  6. 6The energy levels of an atom is shown is figure. Which one of these transitions will result in the emission of a photon of wavelength ? Give2023 (Memory Based Paper 1)Photoelectric Effect
  7. 7A proton and an -particle are accelerated from rest by and potentials, respectively. The ratio of their de-Broglie wavelength is:2023 (Memory Based Paper 2)Matter Waves
  8. 8The de-Broglie wavelength of an electron moving with a velocity is equal to the wavelength of photon. The ratio of the kinetic energies of e2022Photoelectric Effect
  9. 9Monochromatic light of wavelength is produced by a helium neon laser. The power emitted is . The number of photons arriving per sec on the a2021Photoelectric Effect
  10. 10Electrons are accelerated through a potential difference and protons are accelerated through a potential difference . The de - Broglie wavel2021Matter Waves
  11. 11A plane electromagnetic wave is incident on a plane surface of area A, normally and is perfectly reflected. If energy E strikes the surface 2021Photoelectric Effect
  12. 12A plane electromagnetic wave is incident on a plane surface of area A, normally and is perfectly reflected. If energy E strikes the surface 2020Photoelectric Effect
  13. 13A particle X of mass m and initial velocity u collides with another particle Y of mass 3 m 4 , which is at rest. The collision is head-on an2019Matter Waves
  14. 14The frequency and the intensity of incident beam of light falling on the surface of a photoelectric material is increased by a factor of two2018Photoelectric Effect
  15. 15When photon of energy 4 . 0 eV strikes the surface of a metal A , the elected photoelectrons have maximum kinetic energy T A eV and de-Brogl2018Photoelectric Effect
  16. 16The de-Broglie wavelength of a proton (charge = 1 . 6 10 - 19 C , m = 1 . 6 10 - 27 kg ) accelerated through a potential difference of 1 kV 2017Matter Waves
  17. 17Find the number of photon emitted per second by a 25 watt source of monochromatic light of wavelength . What is the photoelectric current as2016Photoelectric Effect
  18. 18The beam of light has three wavelengths and with a total intensity of equally distributed amongst the three wavelengths. The beam falls norm2015Photoelectric Effect
  19. 19When X-rays strike a material, the photoelectrons from the shell are observed to move in a circle of radius in a magnetic field of tesla act2015Photoelectric Effect
  20. 20The threshold wavelength of the tungsten is 2300 If ultraviolet light of wavelength is incident on it, then the maximum kinetic energy of ph2014Photoelectric Effect
  21. 21Graph betwen stopping potential for most energetic emitted photoelectrons with frequency (v) of incident radiation on metal is given below. 2014Photoelectric Effect
  22. 22A light having wavelength fall on a metal surface. The work function of metal is , what is stopping potential?2012Photoelectric Effect
  23. 23In an experiment on photoelectric effect photons of wavelength eject electrons from a metal of work function . A photon of energy equal to t2012Photoelectric Effect
  24. 24If the energy of a photon is , then its momentum is2011Photoelectric Effect
  25. 25An electron, in a hydrogen-like atom, is in an excited state. It has a total energy of . The kinetic energy and the de-Broglie wavelength of2011Matter Waves
  26. 26Light of wavelength ejects photoelectron from a plate of a metal whose work function is . If a uniform magnetic field of is applied parallel2011Photoelectric Effect
  27. 27The photoelectric threshold of metal is . The energy of the electrons ejected from the surface by ultraviolet light of wavelength is2010Photoelectric Effect
  28. 28A material particle with a rest mass is moving with a velocity of light . Then the wavelength of the de Broglie wave associated with it is :2010Matter Waves
  29. 29In a photoelectric experiment, with light of wavelength the fastest electron has speed . If the exciting wavelength is changed to , the spee2009Photoelectric Effect

Frequently Asked Questions

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

This chapter includes 29 questions compiled from BITSAT papers spanning 2009 to 2024.

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

These are BITSAT 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 BITSAT Physics?

Dual Nature of Matter has appeared in 15 of the 16 years of BITSAT papers covered here, with 29 questions across 17 papers - about 2 per paper it appears in.

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

Of the 29 questions analysed for this chapter, 38% are easy, 45% moderate and 17% tough. 2024 had the most, with 4 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 - 22 questions (76%)
  • Matter Waves - 7 questions (24%)
  • Photoelectric Effect has produced the most tough questions (4).
6.Is Dual Nature of Matter's weightage in BITSAT going up or down?

Across all 17 papers analysed, Dual Nature of Matter has averaged about 1.7 questions per paper. In the last three years (2022–2024), that average has stayed about the same, at about 1.6 questions per paper. Use the year-wise numbers on this page for the exact trend before you decide how much time to give it.