Physics · 2019
JEE Main · 12 April 2019, Shift 2 · Q14
Two sources of sound S_1 and S_2 produce sound waves of same frequency 660 Hz. A listener is moving from source S_1 towards S_2 with a constant speed…
Two sources of sound $\displaystyle S_1$ and $\displaystyle S_2$ produce sound waves of same frequency $\displaystyle 660$ Hz. A listener is moving from source $\displaystyle \mathrm{S}_1$ towards $\displaystyle \mathrm{S}_2$ with a constant speed u m/s and he hears $\displaystyle 10$ beats/s. The velocity of sound is $\displaystyle 330$ m/s. Then, u equals :
Official answer
(1)
2.$\displaystyle 5$ m/s
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JEE Main 2019 Physics question, with the answer from NTA’s final answer key. Where our answers come from.