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Saturday, 10 October

JEE Main 2022 · PhysicsMultiple choiceSingle correctEasyApplication

JEE Main 28 July 2022, Shift 1, Physics Q39

Question 39 of 90 in this shift, Physics question 9 of 30, Section A.

In the wave equation y=0.5sin⁡2πλ(400 t−x) my=0.5\sin\frac{2\pi}{\lambda}(400\,t-x)\ \mathrm{m} the velocity of the wave will be :
  1. (1)200 m/s
  2. (2)2002200\sqrt{2} m/s
  3. (3)400 m/sOfficial answer
  4. (4)4002400\sqrt{2} m/s

Official answer

Option 3

NTA final key (2022 Session 2).

Chapter
Waves
Topic
Waves on Strings
Idea tested
Wave Speed on String

Same idea in other shifts

Asked 2× in all
  1. 8 Apr 2025, Shift 2 · Q34Two strings with circular cross section and made of same material, are stretched to have same amount of tension. A transverse wave is then…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.