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Friday, 9 October

JEE Main Physics · Dual Nature of Radiation and Matter

Photoelectric Effect in JEE Main

Photoelectric Effect (Physics, Dual Nature of Radiation and Matter) came 22 times in 20 of the 42 JEE Main shifts Lumi analysed, across 10 distinct ideas. 13 of them came in 2024–26; it was last asked in 2026.

Questions
22
in 20 shifts
Ideas asked
10
6 asked more than once
Numerical answer
3
14% of its questions
Pattern
Asked most years
last asked 2026
Questions each year
0360’172’200’213’224’235’243’255’26

In the shifts Lumi analysed for each year.

Difficulty and format
Easy 9Medium 13Hard 0

Format

  • Single correct14 Q
  • Numerical value3 Q
  • Other2 Q
  • Diagram based1 Q
  • Two statements1 Q
  • Assertion–reason1 Q
Ideas inside the topic
10 ideas
Where it sits

Part of Dual Nature of Radiation and Matter, which had 40 questions in all. Photoelectric Effect accounts for 55% of them. In Lumi's JEE taxonomy it belongs to Modern Physics.

Some questions sit in other chapters too: Atoms, Electromagnetic Waves, Structure of Atom.

Every question

All 22 Photoelectric Effect questions

Newest first, each with its options and official answer.

  1. 2 Apr 2026, Shift 1 · Q42For a certain metal, when monochromatic light of wavelength λ\lambda is incident, the stopping potential for photoelectrons is 3Vo3V_o.…MediumSingle correct
  2. 4 Apr 2026, Shift 1 · Q32The graph shows variation of stopping potential VoV_o with the frequency ν\nu of the incident radiation for three photosensitive metals…MediumDiagram basedHas a figure
  3. 5 Apr 2026, Shift 1 · Q41Light source having wavelength 331 nm is used to generate photo-electrons whose stopping potential is 0.2 V. The work function of the used…EasySingle correct
  4. 8 Apr 2026, Shift 2 · Q38A monochromatic source of light operating at 15 kW emits 2.5×10222.5 \times 10^{22} photons/s. The region of an electromagnetic spectrum to…MediumSingle correct
  5. 8 Apr 2026, Shift 2 · Q43K1K_1 and K2K_2 be the maximum kinetic energies of photoelectrons emitted from a surface of a given material for the light of wavelength…MediumSingle correct
  6. 2 Apr 2025, Shift 1 · Q44A monochromatic light is incident on a metallic plate having work function ϕ\phi. An electron, emitted normally to the plate from a point…MediumSingle correct
  7. 3 Apr 2025, Shift 1 · Q43The work function of a metal is 3 eV. The color of the visible light that is required to cause emission of photoelectrons isEasySingle correct
  8. 7 Apr 2025, Shift 1 · Q52Which of the following statements are correct, if the threshold frequency of caesium is 5.16×10145.16 \times 10^{14} Hz? A. When Cs is placed…MediumOtherHas a figure
  9. 6 Apr 2024, Shift 2 · Q47When UV light of wavelength 300 nm is incident on the metal surface having work function 2.13 eV, electron emission takes place. The…EasySingle correct
  10. 9 Apr 2024, Shift 2 · Q47UV light of 4.134.13 eV is incident on a photosensitive metal surface having work function 3.133.13 eV. The maximum kinetic energy of ejected…EasySingle correct
  11. 30 Jan 2024, Shift 2 · Q46For the photoelectric effect, the maximum kinetic energy (EkE_k) of the photoelectrons is plotted against the frequency (ν\nu) of the…EasySingle correctHas a figure
  12. 31 Jan 2024, Shift 1 · Q46When a metal surface is illuminated by light of wavelength λ\lambda, the stopping potential is 8V. When the same surface is illuminated…MediumSingle correct
  13. 31 Jan 2024, Shift 2 · Q46In a photoelectric effect experiment a light of frequency 1.5 times the threshold frequency is made to fall on the surface of…EasySingle correct
  14. 8 Apr 2023, Shift 2 · Q45In photo electric effect A. The photocurrent is proportional to the intensity of the incident radiation. B. Maximum Kinetic energy with…EasyOther
  15. 11 Apr 2023, Shift 1 · Q34A metallic surface is illuminated with radiation of wavelength λ\lambda, the stopping potential is V0V_0. If the same surface is…MediumSingle correct
  16. 13 Apr 2023, Shift 2 · Q47Given below are two statements: Statement I : Out of microwaves, infrared rays and ultraviolet rays, ultraviolet rays are the most…EasyTwo statements
  17. 13 Apr 2023, Shift 2 · Q60An atom absorbs a photon of wavelength 500500 nm and emits another photon of wavelength 600600 nm. The net energy absorbed by the atom in…MediumNumerical value
  18. 25 Jul 2022, Shift 1 · Q47A metal exposed to light of wavelength 800800 nm and and emits photoelectrons with a certain kinetic energy. The maximum kinetic energy of…MediumSingle correct
  19. 24 Jun 2022, Shift 1 · Q56When light of frequency twice the threshold frequency is incident on the metal plate, the maximum velocity of emitted electron is v1v_1.…MediumNumerical value
  20. 29 Jun 2022, Shift 1 · Q37Given below are two statements : one is labelled as Assertion A and the other is labelled as Reason R. Assertion A : The photoelectric…EasyAssertion–reason
  21. 8 Jan 2020, Shift 1 · Q17When photon of energy 4.0 eV strikes the surface of a metal A, the ejected photoelectrons have maximum kinetic energy TAT_A eV and…MediumSingle correct
  22. 2 Sep 2020, Shift 1 · Q25When radiation of wavelength λ\lambda is used to illuminate a metallic surface, the stopping potential is VV. When the same surface is…MediumNumerical value