Learn

Saturday, 31 October

JEE Main · Physics · Moving Charges and Magnetism

Trajectory Radii Ratio for Same Kinetic Energy

JEE Main asked Trajectory Radii Ratio for Same Kinetic Energy 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 2022 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.

00.050.10’170’200.03’210.07’220’230.05’240’250’26

Raw count: 2017: 0 in 1 shift · 2020: 0 in 12 shifts · 2021: 1 in 24 shifts · 2022: 2 in 24 shifts · 2023: 0 in 12 shifts · 2024: 1 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
  • 20241 of 18
  • 20230 of 12
  • 20222 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

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

  • Ratio of radii for same kinetic energy
  • Ratio of radii for same kinetic energy in b-field

Difficulty

Easy 3Medium 1Hard 0

1 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. 9 Apr 2024, Shift 2 · Q44A proton and a deutron (q=+eq=+e, m=2.0m=2.0u) having same kinetic energies enter a region of uniform magnetic field B⃗\vec{B}, moving…EasySingle correct
  2. 27 Jun 2022, Shift 2 · Q58A deuteron and a proton moving with equal kinetic energy enter into to a uniform magnetic field at right angle to the field. If rdr_d and…EasyNumerical value
  3. 24 Jun 2022, Shift 2 · Q39A proton, a deuteron and an α\alpha-particle with same kinetic energy enter into a uniform magnetic field at right angle to magnetic…EasySingle correct
  4. 27 Aug 2021, Shift 1 · Q13Two ions of masses 4 amu and 16 amu have charges +2+2e and +3+3e respectively. These ions pass through the region of constant…MediumSingle correct

Shifts: 27 Aug 2021, Shift 1, 24 Jun 2022, Shift 2, 27 Jun 2022, Shift 2, 9 Apr 2024, Shift 2.

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