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Friday, 9 October

JEE Main 2022 · PhysicsMultiple choiceSingle correctMediumCalculation

JEE Main 25 July 2022, Shift 1, Physics Q41

Question 41 of 90 in this shift, Physics question 11 of 30, Section A.

Two charged particles, having same kinetic energy, are allowed to pass through a uniform magnetic field perpendicular to the direction of motion. If the ratio of radii of their circular paths is 6:56:5 and their respective masses ratio is 9:49:4. Then, the ratio of their charges will be :
  1. (1)8:58:5
  2. (2)5:45:4Official answer
  3. (3)5:35:3
  4. (4)8:78:7

Official answer

Option 2

NTA final key (2022 Session 2).

Chapter
Moving Charges and Magnetism
Topic
Lorentz Force
Idea tested
Radius-Kinetic Energy Proportionality

Same idea in other shifts

Asked 3× in all
  1. 7 Apr 2025, Shift 1 · Q37A particle of charge q, mass m and kinetic energy E enters in magnetic field perpendicular to its velocity and undergoes a circular arc of…EasyDiagram basedHas a figure
  2. 29 Jun 2022, Shift 1 · Q39A charge particle moves along circular path in a uniform magnetic field in a cyclotron. The kinetic energy of the charge particle…EasySingle correct

Question text from the official JEE Main paper published by NTA; answer from the final answer key. Chapter, topic and idea tags, difficulty and skill are Lumi’s. Lumi analyses 42 of the 174 JEE Main shifts held from 2017 to 2026.