Dual Nature of Radiation and Matter

JEE Advanced · Physics · 35 past questions

1. Q1 2026 Paper 2

   A nuclear reactor starts producing a radioactive nuclide $X$ from $t=0$, at a constant rate of $\alpha$ per…

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2. Q2 2025 Paper 1

   A cube of unit volume contains $35\times10^{7}$ photons of frequency $10^{15}$ Hz. If the energy of all the…

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3. Q3 2025 Paper 1

   List-I shows various functional dependencies of energy ($E$) on the atomic number ($Z$). Energies associated…

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4. Q4 2024 Paper 2

   A metal target with atomic number $Z = 46$ is bombarded with a high energy electron beam. The emission of…

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5. Q5 2023 Paper 1

   A Hydrogen-like atom has atomic number $Z$. Photons emitted in the electronic transitions from level $n=4$ to…

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6. Q6 2022 Paper 2

   When light of a given wavelength is incident on a metallic surface, the minimum potential needed to stop the…

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7. Q7 2021 Paper 2

   In a photoemission experiment, the maximum kinetic energies of photoelectrons from metals $P$, $Q$ and $R$…

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8. Q8 2020 Paper 2

   In an X-ray tube, electrons emitted from a filament (cathode) carrying current $I$ hit a target (anode) at a…

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9. Q9 2018 Paper 2

   In a photoelectric experiment a parallel beam of monochromatic light with power of $200\ W$ is incident on a…

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10. Q10 2017 Paper 2

    A photoelectric material having work-function $\phi_0$ is illuminated with light of wavelength…

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11. Q11 2016 Paper 1

    In a historical experiment to determine Planck's constant, a metal surface was irradiated with light of…

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12. Q12 2016 Paper 1

    Highly excited states for hydrogen-like atoms (also called Rydberg states) with nuclear charge $Ze$ are…

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13. Q13 2016 Paper 2

    Light of wavelength $\lambda_{ph}$ falls on a cathode plate inside a vacuum tube as shown in the figure. The… (with a figure)

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14. Q14 2015 Paper 1

    Consider a hydrogen atom with its electron in the $n^{\text{th}}$ orbital. An electromagnetic radiation of…

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15. Q15 2015 Paper 1

    For photo-electric effect with incident photon wavelength $\lambda$, the stopping potential is $V_0$.… (with a figure)

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16. Q16 2015 Paper 2

    For a radioactive material, its activity $A$ and rate of change of its activity $R$ are defined as…

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17. Q17 2015 Paper 2

    An electron in an excited state of $\mathrm{Li}^{2+}$ ion has angular momentum $3h/2\pi$. The de Broglie…

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18. Q18 2014 Paper 2

    A metal surface is illuminated by light of two different wavelengths $248\ nm$ and $310\ nm$. The maximum…

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19. Q19 2014 Paper 2

    If $\lambda_{Cu}$ is the wavelength of $K_\alpha$ X-ray line of copper (atomic number 29) and $\lambda_{Mo}$…

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20. Q20 2013 Paper 1

    A pulse of light of duration $100\ ns$ is absorbed completely by a small object initially at rest. Power of…

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21. Q21 2013 Paper 1

    The work functions of Silver and Sodium are 4.6 and 2.3 $eV$, respectively. The ratio of the slope of the…

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22. Q22 2012 Paper 2

    The $\beta$-decay process, discovered around 1900, is basically the decay of a neutron ($n$). In the…

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23. Q23 2012 Paper 2

    The $\beta$-decay process, discovered around 1900, is basically the decay of a neutron ($n$). In the…

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24. Q24 2011 Paper 2

    A silver sphere of radius 1 cm and work function 4.7 eV is suspended from an insulating thread in free-space.…

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25. Q25 2010 Paper 1

    An $\alpha$-particle and a proton are accelerated from rest by a potential difference of 100V. After this…

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26. Q26 2009 Paper 1

    Paragraph for Question Nos. 56 to 58…

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27. Q27 2009 Paper 1

    Paragraph for Question Nos. 56 to 58…

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28. Q28 2009 Paper 1

    Paragraph for Question Nos. 56 to 58…

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29. Q29 2009 Paper 2

    Photoelectric effect experiments are performed using three different metal plates p, q and r having work… (with a figure)

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30. Q30 2009 Paper 2

    Column II gives certain systems undergoing a process. Column I suggests changes in some of the parameters…

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31. Q31 2008 Paper 1

    Which one of the following statements is **WRONG** in the context of X-rays generated from a X-ray tube?

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32. Q32 2008 Paper 1

    Assume that the nuclear binding energy per nucleon (B/A) versus mass number (A) is as shown in the figure.… (with a figure)

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33. Q33 2008 Paper 2

    A radioactive sample S1 having an activity of $5\,\mu$Ci has twice the number of nuclei as another sample S2…

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34. Q34 2007 Paper 1

    STATEMENT-1…

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35. Q35 2007 Paper 2

    Electrons with de-Broglie wavelength $\lambda$ fall on the target in an X-ray tube. The cut-off wavelength of…

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