Physics · 2019
JEE Main · 10 April 2019, Shift 2 · Q14
A source of sound S is moving with a velocity of 50 m / s towards a stationary observer. The observer measures the frequency of the source as 1000…
A source of sound $\displaystyle S$ is moving with a velocity of $\displaystyle 50 \mathrm{~m} / \mathrm{s}$ towards a stationary observer. The observer measures the frequency of the source as $\displaystyle 1000$ Hz. What will be the apparent frequency of the source when it is moving away from the observer after crossing him? (Take velocity of sound in air is $\displaystyle 350 \mathrm{~m} / \mathrm{s}$ )
Official answer
(3)
$\displaystyle 750$ Hz
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JEE Main 2019 Physics question, with the answer from NTA’s final answer key. Where our answers come from.