Physics · 2021
JEE Main · 26 August 2021, Shift 1 · Q30
A source and a detector move away from each other in absence of wind with a speed of 20 m/s with respect to the ground. If the detector detects a…
A source and a detector move away from each other in absence of wind with a speed of $\displaystyle 20$ m/s with respect to the ground. If the detector detects a frequency of $\displaystyle 1800$ Hz of the sound coming from the source, then the original frequency of source considering speed of sound in air $\displaystyle 340$ m/s will be \_\_\_\_ Hz .
Official answer
2025
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JEE Main 2021 Physics question, with the answer from NTA’s final answer key. Where our answers come from.