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Saturday, 31 October

JEE Main · Physics · Moving Charges and Magnetism

Velocity Selector and Crossed Fields

JEE Main asked Velocity Selector and Crossed Fields 4 times in 4 of the 108 shifts Lumi analysed, in 2021, 2022 and 2024. It belongs to Lorentz Force, in Moving Charges and Magnetism (Physics). The longest wait between two years asking it was 2 years. In 2024 it came in more than one shift of the same year.

Updated 2026-10-24

Times asked
4
in 4 shifts
Years
3 of 8
First asked
2021
last in 2024
Pattern
Comes in cycles
across the analysed shifts

Questions on this idea a shift, by year

2017–2026. Asked in 2021, 2022 and 2024. Years differ in how many shifts Lumi analysed, so each year is scaled to one shift of 25 Physics questions.

00.050.10’170’200.03’210.03’220’230.09’240’250’26

Raw count: 2017: 0 in 1 shift · 2020: 0 in 12 shifts · 2021: 1 in 24 shifts · 2022: 1 in 24 shifts · 2023: 0 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
  • 20230 of 12
  • 20221 of 24
  • 20211 of 24
  • 20200 of 12
  • 20170 of 1

Asked in that shift More than once Not asked

How JEE Main framed it

Numerical value is the usual form. Skill tested: multi-step.

  • Electric field for undeflected electron
  • Conditions for undeflected charge in fields

Difficulty

Easy 1Medium 3Hard 0

2 of the 4 questions had a numerical answer.

Every question

All 4 questions

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

  1. 27 Jan 2024, Shift 1 · Q42A proton moving with a constant velocity passes through a region of space without any change in its velocity. If E⃗\vec{E} and B⃗\vec{B}…MediumOther
  2. 8 Apr 2024, Shift 1 · Q57An electron with kinetic energy 5 eV enters a region of uniform magnetic field of 3 μ\muT perpendicular to its direction. An electric…MediumNumerical value
  3. 26 Jul 2022, Shift 2 · Q47A velocity selector consists of electric field E⃗=Ek^\vec{E} = E\hat{k} and magnetic field B⃗=Bj^\vec{B} = B\hat{j} with B=12 mTB = 12\ mT. The value…MediumSingle correct
  4. 4 Aug 2021, Shift 1 · Q28A potential difference of 800 V is applied across the plates of a parallel plate capacitor. The separation between the plates is 5 mm and…EasyNumerical value

Shifts: 4 Aug 2021, Shift 1, 26 Jul 2022, Shift 2, 27 Jan 2024, Shift 1, 8 Apr 2024, Shift 1.

Same topic

Other ideas in Lorentz Force

Lorentz Force has 18 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