JEE Main 2021 · PhysicsMultiple choiceSingle correctEasyApplication

JEE Main 4 August 2021, Shift 1, Physics Q17

Question 17 of 90 in this shift, Physics question 17 of 30, Section A.

If a particle of mass ‘m’ moves in x–y plane according to the equation

\vec{r}=(\hat{i}+\hat{j})

(A sin314 t + B cos314 t) m The frequency of SHM in Hz will be given by

(1)100 Hz
(2)50 HzOfficial answer
(3)157 Hz
(4)314 Hz

Official answer

Option 2

NTA final key.

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

Same idea in other shifts

Asked 3× in all

4 Apr 2025, Shift 2 · Q34Displacement 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…EasySingle correct
26 Feb 2021, Shift 2 · Q22Time period of a simple pendulum is T. The time taken to complete $\frac{5}{8}$ oscillations starting from mean position is…MediumNumerical value

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.