Physics · 2021
JEE Main · 17 March 2021, Shift 2 · Q3
A sound wave of frequency 245 Hz travels with the speed of 300 ms^-1 along the positive x -axis. Each point of the wave moves to and fro through a…
A sound wave of frequency $\displaystyle 245$ Hz travels with the speed of $\displaystyle 300 \mathrm{~ms}^{-1}$ along the positive $\displaystyle x$-axis. Each point of the wave moves to and fro through a total distance of $\displaystyle 6$ cm . What will be the mathematical expression of this travelling wave ?
Official answer
(2)
$\displaystyle \mathrm{Y}(x, \mathrm{t})=0.03\left[\sin 5.1 x-\left(1.5 \times 10^3\right) \mathrm{t}\right]$
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JEE Main 2021 Physics question, with the answer from NTA’s final answer key. Where our answers come from.