Physics · 2019
JEE Main · 12 January 2019, Shift 2 · Q13
A resonance tube is old and has jagged end. It is still used in the laboratory to determine velocity of sound in air. A tuning fork of frequency 512…
A resonance tube is old and has jagged end. It is still used in the laboratory to determine velocity of sound in air. A tuning fork of frequency $\displaystyle 512$ Hz produces first resonance when the tube is filled with water to a mark $\displaystyle 11$ cm below a reference mark, near the open end of the tube. The experiment is repeated with another fork of frequency $\displaystyle 256$ Hz which produces first resonance when water reaches a mark $\displaystyle 27$ cm below the reference mark. The velocity of sound in air, obtained in the experiment, is close to :
Official answer
(1)
$\displaystyle 328 \mathrm{~ms}^{-1}$
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JEE Main 2019 Physics question, with the answer from NTA’s final answer key. Where our answers come from.