Physics · 2015
JEE Main · 10 April 2015, Shift 1 · Q13
A bat moving at 10 ms^-1 towards a wall sends a sound signal of 8000 Hz towards it. On reflection it hears a sound of frequency f. The value of f in…
A bat moving at $\displaystyle 10 \mathrm{~ms}^{-1}$ towards a wall sends a sound signal of $\displaystyle 8000$ Hz towards it. On reflection it hears a sound of frequency $\displaystyle f$. The value of $\displaystyle f$ in Hz is close to (speed of sound $\displaystyle =320 \mathrm{~ms}^{-1}$ )
Official answer
(2)
$\displaystyle 8516$
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JEE Main 2015 Physics question, with the answer from NTA’s final answer key. Where our answers come from.