Learn

Saturday, 31 October

JEE Main · Physics · Dual Nature of Radiation and Matter

Wavelength in E-Field as Function of Time

JEE Main asked Wavelength in E-Field as Function of Time 2 times in 2 of the 108 shifts Lumi analysed, in 2020 and 2026. It belongs to Matter Waves, in Dual Nature of Radiation and Matter (Physics). The longest wait between two years asking it was 6 years.

Updated 2026-10-24

Times asked
2
in 2 shifts
Years
2 of 8
First asked
2020
last in 2026
Pattern
Occasional
across the analysed shifts

Questions on this idea a shift, by year

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

00.10.20’170.08’200’210’220’230’240’250.11’26

Raw count: 2017: 0 in 1 shift · 2020: 1 in 12 shifts · 2021: 0 in 24 shifts · 2022: 0 in 24 shifts · 2023: 0 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.

  • 20261 of 9
  • 20250 of 8
  • 20240 of 18
  • 20230 of 12
  • 20220 of 24
  • 20210 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: multi-step.

  • De broglie wavelength of charge in field
  • De broglie wavelength of charge in electric field vs time

Difficulty

Easy 0Medium 2Hard 0

Every question was multiple choice.

Every question

All 2 questions

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

  1. 5 Apr 2026, Shift 1 · Q35An electron of mass mm is moving in an electric field E⃗=−2E0i^\vec{E} = -2E_0\hat{i} (E0E_0 = constant >0> 0), with an initial velocity…MediumSingle correct
  2. 8 Jan 2020, Shift 2 · Q18An electron (mass m) with initial velocity v⃗=v0 i^+v0 j^\vec{v}=v_0\,\hat{i}+v_0\,\hat{j} is in an electric field E⃗=−E0 k^\vec{E}=-E_0\,\hat{k}. If…MediumSingle correct

Shifts: 8 Jan 2020, Shift 2, 5 Apr 2026, 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