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Saturday, 31 October

JEE Main · Physics · Moving Charges and Magnetism

Circular Motion in Uniform B-Field

JEE Main asked Circular Motion in Uniform B-Field 7 times in 7 of the 108 shifts Lumi analysed, in 2020, 2021, 2022 and 2025. It belongs to Lorentz Force, in Moving Charges and Magnetism (Physics). The longest wait between two years asking it was 3 years. In 2021 and 2022 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 2025
Pattern
Comes in cycles
across the analysed shifts

Questions on this idea a shift, by year

2017–2026. Asked in 2020, 2021, 2022 and 2025. Years differ in how many shifts Lumi analysed, so each year is scaled to one shift of 25 Physics questions.

00.10.20’170.08’200.10’210.07’220’230’240.13’250’26

Raw count: 2017: 0 in 1 shift · 2020: 1 in 12 shifts · 2021: 3 in 24 shifts · 2022: 2 in 24 shifts · 2023: 0 in 12 shifts · 2024: 0 in 18 shifts · 2025: 1 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
  • 20251 of 8
  • 20240 of 18
  • 20230 of 12
  • 20222 of 24
  • 20213 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: calculation.

  • Displacement of charge crossing two magnetic regions
  • Maximum speed of electron fired radially in solenoid

Difficulty

Easy 2Medium 4Hard 1

1 of the 7 questions had a numerical answer.

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. 7 Apr 2025, Shift 1 · Q40Uniform magnetic fields of different strengths (B1B_1 and B2B_2), both normal to the plane of the paper exist as shown in the figure. A…HardDiagram basedHas a figure
  2. 28 Jun 2022, Shift 1 · Q59A singly ionized magnesium atom (A=24) ion is accelerated to kinetic energy 5 keV, and is projected perpendicularly into a magnetic field…MediumNumerical value
  3. 25 Jul 2022, Shift 2 · Q41An electron with energy 0.1 keV moves at right angle to the earth's magnetic field of 1×10−41 \times 10^{-4} Wbm−2^{-2}. The frequency of…MediumSingle correct
  4. 18 Mar 2021, Shift 2 · Q16A proton and an α\alpha-particle, having kinetic energies KpK_p and KαK_\alpha respectively, enter into a magnetic field at right angles.…MediumSingle correct
  5. 25 Jul 2021, Shift 2 · Q14Two ions having same mass have charges in the ratio 1 : 2. They are projected normally in a uniform magnetic field with their speeds in…EasySingle correct
  6. 4 Aug 2021, Shift 1 · Q9Assume there is a possibility of constant Electric field and Magnetic field and a charged particle under the influence of these forces…EasySingle correct
  7. 9 Jan 2020, Shift 2 · Q14An electron gun is placed inside a long solenoid of radius RR on its axis. The solenoid has nn turns/length and carries a current II.…MediumSingle correctHas a figure

Shifts: 9 Jan 2020, Shift 2, 18 Mar 2021, Shift 2, 25 Jul 2021, Shift 2, 4 Aug 2021, Shift 1, 28 Jun 2022, Shift 1, 25 Jul 2022, Shift 2, 7 Apr 2025, 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