Dual Nature of Matter & Radiation: NEET Physics Previous Year Questions

313 previous year questions from Dual Nature of Matter & Radiation. Here are the 25 most important ones; open any question for the correct answer and a full step-by-step solution.

1. 1.If the wavelength of the first member of Lyman series of hydrogen is $\lambda$. The wavelength of the second member will be
2. 2.When a metal surface is illuminated by light of wavelength $\lambda$, the stopping potential is $8V$. When the same surface is illuminated by light of wavelengt…
3. 3.A proton and an electron are associated with same de-Broglie wavelength. The ratio of their kinetic energies is: (Assume…
4. 4.When light of wavelength 300 nm (nanometer) falls on a photoelectric emitter, photoelectrons are liberated. For another emitter, however, light of 600 nm wavelength is su…
5. 5.A charged particle is accelerated from rest through a certain potential difference. The de-Broglie wavelength is ${\lambda }_1$ when it is accelerated through…
6. 6.An electron of mass $m$ and a photon have same energy $E$. The ratio of de-Broglie wavelengths associated with them is [NEET 2016]
7. 7.Light of two different frequencies whose photons have energies $1\text{eV}$ and $2.5\text{eV}$ respectively, successively illuminate a metallic surface whose work funct…
8. 8.The maximum kinetic energy of emitted electrons in a photoelectric effect does not depend upon
9. 9.In a photo electric experiment, the wavelength of the light incident on the metal is changed from $200\text{nm}$ to $400\text{nm}$. The decrease in the st…
10. 10.In a discharge tube ionization of enclosed gas is produced due to collisions between
11. 11.The energy that should be added to an electron to reduce ils de-Broglie wavelength from $1\text{nm}$ to $0.5\text{nm}$ is
12. 12.Monochromatic radiation emitted when electron on hydrogen atom jumps from first excited to the ground state irradiates a photosensitive material. The stopping potential i…
13. 13.In a photocell, frequency of incident radiation is increased by keeping other factors constant $(\text{(}v\text{)}>v_0)$, the stopping potential
14. 14.The wavelength of a $1\text{keV}$ photon is $1.24\times 10^{-9}m$. What is the frequency of $1\text{MeV}$ photon?
15. 15.When UV light of wavelength $300\text{nm}$ is incident on the metal surface having work function $2.13\text{eV}$, electron emission takes place. The stopping pot…
16. 16.On a photosensitive material, when frequency of incident radiation is increased by $30\text{\%}$, kinetic energy of emitted photoelectrons increases from $0.4\text{eV}$…
17. 17.Monochromatic radiation is incident on hydrogen (H) sample which is in ground state. If the hydrogen atoms emit radiation of ten different wavelengths after absorbing the…
18. 18.A light wave described by $E=60(\text{sin}\text{⁡}(3\times {10}^{15})t+\text{sin}\text{⁡}(12\times {10}^{15})t)$ (in SI units) falls on a metal surface of work function…
19. 19.In photoelectric experiment, if both the intensity and frequency of the incident light are doubled, then the saturation photoelectric current
20. 20.Hydrogen atom is in its $n^{\text{th}}$ energy state. If de-Broglie wavelength of the electron is $\lambda$,then
21. 21.A photoelectric surface is illuminated successively by monochromatic light of wavelength λ and $\lambda /2$. If the maximum kinetic energy of the emitted photoelectrons…
22. 22.A light source of wavelength $\lambda$ illuminates a metal surface and electrons are ejected with maximum kinetic energy of 2 eV. If the same surface is illuminated by…
23. 23.The de Brogue wavelengths for an electron and a photon are ${\lambda }_e$ and ${\lambda }_p$ respectively. For the same kinetic energy of electron and photon, which…
24. 24.The de-Broglie wavelength $\text{(}\lambda \text{)}$ of a particle is related to its kinetic energy $\text{(}E\text{)}$ as
25. 25.The de Broglie wavelength of an electron accelerated between two plates having a potential difference of 900 $V$ is nearly