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Saturday, 31 October

JEE Main 2021 · PhysicsMultiple choiceMatch the listEasyRecall

JEE Main 24 February 2021, Shift 2, Physics Q13

Question 13 of 90 in this shift, Physics question 13 of 30, Section A.

Match List - I with List - II. List - I List - II (a) Source of microwave frequency (i) Radioactive decay of nucleus (b) Source of infrared frequency (ii) Magnetron (c) Source of Gamma Rays (iii) Inner shell electrons (d) Source of X-rays (iv) Vibration of atoms and molecules (v) LASER (vi) RC circuit Choose the correct answer from the options given below :
  1. (1)(a)-(vi), (b)-(v), (c)-(i), (d)-(iv)
  2. (2)(a)-(vi), (b)-(iv), (c)-(i), (d)-(v)
  3. (3)(a)-(ii), (b)-(iv), (c)-(i), (d)-(iii)Official answer
  4. (4)(a)-(ii), (b)-(iv), (c)-(vi), (d)-(iii)

Official answer

Option 3

NTA final key.

Chapter
Electromagnetic Waves
Topic
No close match in our taxonomy
Idea tested
No close match in our taxonomy

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.