Physics · 2021
JEE Main · 31 August 2021, Shift 2 · Q10
A bob of mass ' m ' suspended by a thread of length l undergoes simple harmonic oscillations with time period T. If the bob is immersed in a liquid…
A bob of mass ' $\displaystyle m$ ' suspended by a thread of length $\displaystyle l$ undergoes simple harmonic oscillations with time period T. If the bob is immersed in a liquid that has density $\displaystyle \frac{1}{4}$ times that of the bob and the length of the thread is increased by $\displaystyle 1 / 3^{\text {rd }}$ of the original length, then the time period of the simple harmonic oscillations will be :
Official answer
(1)
$\displaystyle \frac{4}{3} \mathrm{~T}$
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JEE Main 2021 Physics question, with the answer from NTA’s final answer key. Where our answers come from.