JEE Main 2025 · PhysicsMultiple choiceSingle correctEasyCalculation

JEE Main 4 April 2025, Shift 2, Physics Q34

Question 34 of 75 in this shift, Physics question 9 of 25, Section A.

Displacement of a wave is expressed as

x(t)=5\cos\left(628t+\frac{\pi}{2}\right)

m. The wavelength of the wave when its velocity is 300 m/s is : (

\pi=3.14

)

(1)0.5 m
(2)3 mOfficial answer
(3)5 m
(4)0.33 m

Official answer

Option 2

NTA final key.

Chapter: Waves
Topic: SHM Equations
Idea tested: General Solution of SHM

Same topic in other shifts

All SHM Equations questions

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6 Apr 2026, Shift 1 · Q37A particle is executing simple harmonic motion. Its amplitude is $A$ and time period is 5 sec. The time required by it to move from $x=A$ …EasySingle correct
8 Apr 2026, Shift 2 · Q37The frequency of oscillation of a mass $m$ suspended by a spring is $v_1$ . If the length of the spring is cut to half, the same mass…EasySingle correct
2 Apr 2025, Shift 1 · Q33A particle is subjected to two simple harmonic motions as : $x_1=\sqrt{7}\sin5t$ cm and $x_2=2\sqrt{7}\sin\left(5t+\frac{\pi}{3}\right)$ …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 42 of the 174 JEE Main shifts held from 2017 to 2026.