JEE Main 2022 · PhysicsMultiple choiceSingle correctMediumConceptual

JEE Main 29 July 2022, Shift 1, Physics Q39

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

The time period of oscillation of a simple pendulum of length L suspended from the roof of a vehicle, which moves without friction down an inclined plane of inclination

\alpha

, is given by :

(1) $2\pi\sqrt{L/(g\cos\alpha)}$ Official answer
(2) $2\pi\sqrt{L/(g\sin\alpha)}$
(3) $2\pi\sqrt{L/g}$
(4) $2\pi\sqrt{L/(g\tan\alpha)}$

Official answer

Option 1

NTA final key.

Chapter: Oscillations
Topic: Pendulums
Idea tested: Pendulum on a Smooth Incline

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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 108 of the 174 JEE Main shifts held from 2017 to 2026.