Learn

Saturday, 31 October

JEE Main · Physics · Dual Nature of Radiation and Matter

Wavelength from Kinetic Energy

JEE Main asked Wavelength from Kinetic Energy 7 times in 7 of the 108 shifts Lumi analysed, in 2020, 2021, 2023 and 2024. It belongs to Matter Waves, in Dual Nature of Radiation and Matter (Physics). The longest wait between two years asking it was 2 years. In 2021, 2023 and 2024 it came in more than one shift of the same year.

Updated 2026-10-24

Times asked
7
in 7 shifts
Years
4 of 8
First asked
2020
last in 2024
Pattern
Comes in cycles
across the analysed shifts

Questions on this idea a shift, by year

2017–2026. Asked in 2020, 2021, 2023 and 2024. Years differ in how many shifts Lumi analysed, so each year is scaled to one shift of 25 Physics questions.

00.10.20’170.08’200.07’210’220.14’230.09’240’250’26

Raw count: 2017: 0 in 1 shift · 2020: 1 in 12 shifts · 2021: 2 in 24 shifts · 2022: 0 in 24 shifts · 2023: 2 in 12 shifts · 2024: 2 in 18 shifts · 2025: 0 in 8 shifts · 2026: 0 in 9 shifts.

Shift by shift

Each square is one analysed shift, in date order. Open a filled one for that paper.

  • 20260 of 9
  • 20250 of 8
  • 20242 of 18
  • 20232 of 12
  • 20220 of 24
  • 20212 of 24
  • 20201 of 12
  • 20170 of 1

Asked in that shift More than once Not asked

How JEE Main framed it

Single correct is the usual form. Skill tested: application.

  • Order/ranking of de broglie wavelengths
  • Ratio of kinetic energies at equal wavelength

Difficulty

Easy 5Medium 2Hard 0

Every question was multiple choice.

Every question

All 7 questions

From the official JEE Main shift papers, newest first. Open one for the full question, the options and the official answer.

  1. 9 Apr 2024, Shift 1 · Q46A proton, an electron and an alpha particle have the same energies. Their de-Broglie wavelengths will be compared as :EasySingle correct
  2. 8 Apr 2024, Shift 1 · Q44A proton and an electron are associated with same de-Broglie wavelength. The ratio of their kinetic energies is: (Assume…EasySingle correct
  3. 15 Apr 2023, Shift 1 · Q45The de Broglie wavelength of an electron having kinetic energy E is λ\lambda. If the kinetic energy of electron becomes E4\frac{E}{4},…EasySingle correct
  4. 6 Apr 2023, Shift 1 · Q35The kinetic energy of an electron, α\alpha-particle and a proton are given as 4 K, 2 K and K respectively. The de-Broglie wavelength…MediumSingle correct
  5. 25 Jul 2021, Shift 1 · Q6What should be the order of arrangement of de-Broglie wavelength of electron (λe\lambda_e), an α\alpha-particle (λα\lambda_\alpha) and…EasySingle correct
  6. 26 Aug 2021, Shift 2 · Q8The de-Broglie wavelength of a particle having kinetic energy E is λ\lambda. How much extra energy must be given to this particle so that…MediumSingle correct
  7. 9 Jan 2020, Shift 1 · Q17A particle moving with kinetic energy E has de Broglie wavelength λ\lambda. If energy ΔE\Delta E is added to its energy, the wavelength…EasySingle correct

Shifts: 9 Jan 2020, Shift 1, 25 Jul 2021, Shift 1, 26 Aug 2021, Shift 2, 6 Apr 2023, Shift 1, 15 Apr 2023, Shift 1, 8 Apr 2024, Shift 1, 9 Apr 2024, Shift 1.

Same topic

Other ideas in Matter Waves

Matter Waves has 20 ideas JEE Main has asked; 9 of them came up in more than one question. The 12 most asked are below.

Topic analysisChapter analysisStudy this chapterAll repeated ideas