JEE Main 2021 · PhysicsMultiple choiceSingle correctEasyApplication

JEE Main 3 August 2021, Shift 2, Physics Q1

Question 1 of 90 in this shift, Physics question 1 of 30, Section A.

A particle is executing simple harmonic motion with time period

T

. What is the time taken by the particle to go directly to

\frac{1}{\sqrt{2}}

of its amplitude from its mean position ?

(1) $\frac{T}{8}$ Official answer
(2) $\frac{T}{4}$
(3) $\frac{T}{12}$
(4) $T$

Official answer

Option 1

NTA final key.

Chapter: Oscillations
Topic: SHM Equations
Idea tested: Phasor Diagram Technique

Same idea in other shifts

Asked 5× in all

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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.