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Saturday, 31 October

JEE Main 2022 · PhysicsMultiple choiceSingle correctEasyCalculation

JEE Main 27 June 2022, Shift 1, Physics Q38

Question 38 of 90 in this shift, Physics question 8 of 30, Section A.

What percentage of kinetic energy of a moving particle is transferred to a stationary particle when it strikes the stationary particle of 5 times its mass ? (Assume the collision to be head-on elastic collision)
  1. (1)50.0%50.0\%
  2. (2)66.6%66.6\%
  3. (3)55.6%55.6\%Official answer
  4. (4)33.3%33.3\%

Official answer

Option 3

NTA final key.

Chapter
Work, Energy and Power
Topic
Collisions
Idea tested
Fractional Kinetic Energy Transfer

Same idea in other shifts

Asked 2× in all
  1. 4 Aug 2021, Shift 2 · Q17A neutron of mass mn\mathrm{m_n} collides against a moderator nucleus of mass 10 mn10\,\mathrm{m_n} at rest. Considering the collision to be…MediumSingle 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.