Physics · 2016
NEET 2016 · 1 May · Code Y · Q102
A siren emitting a sound of frequency 800 Hz moves away from an observer towards a cliff at a speed of 15 ms^-1. Then, the frequency of sound that…
A siren emitting a sound of frequency $\displaystyle 800$ Hz moves away from an observer towards a cliff at a speed of $\displaystyle 15 \mathrm{~ms}^{-1}$. Then, the frequency of sound that the observer hears in the echo reflected from the cliff is :
(Take velocity of sound in air $\displaystyle =330 \mathrm{~ms}^{-1}$)
Official answer
From NTA’s final answer key for this paper.
(4)
$\displaystyle 838$ Hz
More from Waves
- The second overtone of an open organ pipe has the same frequency as the first overtone of a closed pipe L metre long. The length of the open pipe…2016
- A pipe open at both ends has a fundamental frequency f in air. The pipe is now dipped vertically in a water drum to half of its length. The…2025
- In a guitar, two strings A and B made of same material are slightly out of tune and produce beats of frequency 6 Hz. When tension in B is slightly…2020
- If the initial tension on a stretched string is doubled, then the ratio of the initial and final speeds of a transverse wave along the string is:2022
- A tuning fork is used to produce resonance in a glass tube. The length of the air column in this tube can be adjusted by a variable piston. At room…2018
- The fundamental frequency in an open organ pipe is equal to the third harmonic of a closed organ pipe. If the length of the closed organ pipe is 20…2018
- The two nearest harmonics of a tube closed at one end and open at other end are 220 Hz and 260 Hz. What is the fundamental frequency of the system?2017
- Three sound waves of equal amplitudes have frequencies (n-1), n,(n+1). They superimpose to give beats. The number of beats produced per second will be2016
NEET (UG) 2016 Physics question, with the answer from NTA’s final answer key. Where our answers come from.