Physics · 2023
JEE Main · 25 January 2023, Shift 2 · Q30
A train blowing a whistle of frequency 320 Hz approaches an observer standing on the platform at a speed of 66 m / s. The frequency observed by the…
A train blowing a whistle of frequency $\displaystyle 320$ Hz approaches an observer standing on the platform at a speed of $\displaystyle 66 \mathrm{~m} / \mathrm{s}$. The frequency observed by the observer will be (given speed of sound $\displaystyle =330 \mathrm{~ms}^{-1}$ ) $\displaystyle \_\_\_\_$ Hz.
Official answer
From NTA’s final answer key for this paper.
400
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JEE Main 2023 Physics question, with the answer from NTA’s final answer key. Where our answers come from.