Physics · 2019
JEE Main · 9 January 2019, Shift 2 · Q12
A musician using an open flute of length 50 cm produces second harmonic sound waves. A person runs towards the musician from another end of a hall at…
A musician using an open flute of length $\displaystyle 50$ cm produces second harmonic sound waves. A person runs towards the musician from another end of a hall at a speed of $\displaystyle 10$ km/h. If the wave speed is $\displaystyle 330$ m/s, the frequency heard by the running person shall be close to :
Official answer
(3)
$\displaystyle 666$ Hz
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JEE Main 2019 Physics question, with the answer from NTA’s final answer key. Where our answers come from.