Physics · 2016
JEE Main · 9 April 2016, Shift 1 · Q11
Two engines pass each other moving in opposite directions with uniform speed of 30 m/s. One of them is blowing a whistle of frequency 540 Hz.…
Two engines pass each other moving in opposite directions with uniform speed of $\displaystyle 30$ m/s. One of them is blowing a whistle of frequency $\displaystyle 540$ Hz. Calculate the frequency heard by driver of second engine before they pass each other. Speed of sound is $\displaystyle 330$ m/sec :
Official answer
(3)
$\displaystyle 648$ Hz
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JEE Main 2016 Physics question, with the answer from NTA’s final answer key. Where our answers come from.