JEE Main 2021 · PhysicsMultiple choiceSingle correctEasyApplication

JEE Main 22 July 2021, Shift 2, Physics Q20

Question 20 of 90 in this shift, Physics question 20 of 30, Section A.

\mathrm{T_0}

is the time period of a simple pendulum at a place. If the length of the pendulum is reduced to

\frac{1}{16}

times of its initial value, the modified time period is :

(1) $4\,\mathrm{T_0}$
(2) $\frac{1}{4}\,\mathrm{T_0}$ Official answer
(3) $8\pi\,\mathrm{T_0}$
(4) $\mathrm{T_0}$

Official answer

Option 2

NTA final key.

Chapter: Oscillations
Topic: Pendulums
Idea tested: Simple Pendulum Period

Same idea in other shifts

Asked 4× 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 108 of the 174 JEE Main shifts held from 2017 to 2026.