JEE Main 2025 · PhysicsMultiple choiceSingle correctMediumCalculation

JEE Main 8 April 2025, Shift 2, Physics Q40

Question 40 of 75 in this shift, Physics question 15 of 25, Section A.

The amplitude and phase of a wave that is formed by the superposition of two harmonic travelling waves,

y_1(x, t) = 4\sin(kx - \omega t)

and

y_2(x, t) = 2\sin\left(kx - \omega t + \frac{2\pi}{3}\right)

, are: (Take the angular frequency of initial waves same as

\omega

)

(1) $[2\sqrt{3}, \pi/6]$ Official answer
(2) $[6, \pi/3]$
(3) $[\sqrt{3}, \pi/6]$
(4) $[6, 2\pi/3]$

Official answer

Option 1

NTA final key.

Chapter: Waves
Topic: Waves on Strings
Idea tested: Superposition of Traveling Waves

Same topic in other shifts

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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.