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Saturday, 31 October

JEE Main 2022 · PhysicsMultiple choiceAssertion–reasonEasyConceptual

JEE Main 24 June 2022, Shift 1, Physics Q32

Question 32 of 90 in this shift, Physics question 2 of 30, Section A.

Given below are two statements : One is labelled as Assertion (A) and the other is labelled as Reason (R). Assertion (A) : In an uniform magnetic field, speed and energy remains the same for a moving charged particle. Reason (R) : Moving charged particle experiences magnetic force perpendicular to its direction of motion.
  1. (1)Both (A) and (R) are true and (R) is the correct explanation of (A).Official answer
  2. (2)Both (A) and (R) are true but (R) is NOT the correct explanation of (A).
  3. (3)(A) is true but (R) is false.
  4. (4)(A) is false but (R) is true.

Official answer

Option 1

NTA final key (2022 Session 1).

Chapter
Moving Charges and Magnetism
Topic
Lorentz Force
Idea tested
Work Done by Magnetic Force

Same idea in other shifts

Asked 3× in all
  1. 29 Jun 2022, Shift 2 · Q44Given below are two statements : Statement I: The electric force changes the speed of the charged particle and hence changes its kinetic…EasyTwo statements
  2. 16 Mar 2021, Shift 2 · Q9A charge Q is moving dl⃗\vec{dl} distance in the magnetic field B⃗\vec{B}. Find the value of work done by B⃗\vec{B}.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 108 of the 174 JEE Main shifts held from 2017 to 2026.