JEE Main · Chemistry · Structure of Atom
Photoelectric Effect Coupling
JEE Main asked Photoelectric Effect Coupling 3 times in 3 of the 108 shifts Lumi analysed, in 2020, 2023 and 2026. It belongs to Bohr's Atomic Theory, in Structure of Atom (Chemistry). The longest wait between two years asking it was 3 years.
Updated 2026-10-24
- Times asked
- 3
- in 3 shifts
- Years
- 3 of 8
- First asked
- 2020
- last in 2026
- Pattern
- Frequent
- across the analysed shifts
Questions on this idea a shift, by year
2017–2026. Asked in 2020, 2023 and 2026. Years differ in how many shifts Lumi analysed, so each year is scaled to one shift of 25 Chemistry questions.
Raw count: 2017: 0 in 1 shift · 2020: 1 in 12 shifts · 2021: 0 in 24 shifts · 2022: 0 in 24 shifts · 2023: 1 in 12 shifts · 2024: 0 in 18 shifts · 2025: 0 in 8 shifts · 2026: 1 in 9 shifts.
Shift by shift
Each square is one analysed shift, in date order. Open a filled one for that paper.
How JEE Main framed it
Numerical value is the usual form. Skill tested: calculation.
- Wavelength from photoelectric data
- Metals showing photoelectric effect
Difficulty
3 of the 3 questions had a numerical answer.
Every question
All 3 questions
From the official JEE Main shift papers, newest first. Open one for the full question, the options and the official answer.
- 2 Apr 2026, Shift 2 · Q71The surface of sodium metal is irradiated with radiation of wavelength nm. The kinetic energy of ejected electrons is…EasyNumerical value
- 12 Apr 2023, Shift 1 · Q82Values of work function () for a few metals are given below Metal: Li, Na, K, Mg, Cu, Ag /eV: 2.42, 2.3, 2.25, 3.7, 4.8, 4.3 The…EasyNumerical valueHas a figure
- 2 Sep 2020, Shift 2 · Q46The work function of sodium metal is J. If photons of wavelength 300 nm are incident on the metal, the kinetic energy…EasyNumerical value
Shifts: 2 Sep 2020, Shift 2, 12 Apr 2023, Shift 1, 2 Apr 2026, Shift 2.
Same topic
Other ideas in Bohr's Atomic Theory
Bohr's Atomic Theory has 14 ideas JEE Main has asked; 10 of them came up in more than one question. The 12 most asked are below.
- Bohr Radius Calculation8× · 2026
- Ionization and Excitation Energy6× · 2026
- Total, Kinetic, and Potential Energy4× · 2025
- Circumference and De Broglie Wavelength3× · 2024
- Angular Momentum Quantization3× · 2023
- Longest and Shortest Wavelengths in a Series2× · 2026
- Rydberg Formula and Transitions2× · 2026
- Electron Velocity in Orbit2× · 2024
- Number of Spectral Lines in Transitions2× · 2024
- Limitations of Bohr Modelonce · 2025
- Time Period and Frequency of Electron Revolutiononce · 2024
- Limitations of Bohr's Modelonce · 2021