BITSAT SERIES Physics
Sound
10 previous year questions.
Volume: 10 Ques
Yield: Medium
High-Yield Trend
1
2023 1
2019 2
2018 1
2017 1
2015 1
2011 3
2005 Chapter Questions 10 MCQs
01
PYQ 2005
medium
physics ID: bitsat-2
The disc of a siren containing holes rotates at a constant speed of . The emitted sound is in unison with a tuning fork of frequency :
1
10 Hz
2
360 Hz
3
216 Hz
4
60 Hz
02
PYQ 2005
medium
physics ID: bitsat-2
In an experiment with sonometer a tuning fork of frequency resonates with a length of and another tuning fork resonates with a length of . Tension of the string remaining constant the frequency of the second tuning fork is :
1
163.84 Hz
2
400 Hz
3
320 Hz
4
204.8 Hz
03
PYQ 2005
medium
physics ID: bitsat-2
The ratio of velocity of sound in hydrogen and oxygen at STP is :
1
16:01
2
8:01
3
4:01
4
2:01
04
PYQ 2011
medium
physics ID: bitsat-2
The fundamental frequency of an open organ pipe is 300 Hz. The first overtone of this pipe has the same frequency as the first overtone of a closed organ pipe. If the speed of sound is 330 m/s, then the length of the closed organ pipe is:
1
41 cm
2
37 cm
3
31 cm
4
80 cm
05
PYQ 2015
medium
physics ID: bitsat-2
Two tuning forks with natural frequencies each move relative to a stationary observer.
One fork moves away from the observer, while the other moves towards the observer at the same speed. The observer hears beats of frequency . Find the speed of the tuning forks.
1
1.5 m/s
2
2 m/s
3
1 m/s
4
2.5 m/s
06
PYQ 2017
medium
physics ID: bitsat-2
A tuning fork of frequency 392 Hz resonates with 50 cm length of a string under tension T. If the mass of the string is decreased by 2%, keeping the tension constant, the number of beats heard when the string and the tuning fork are made to vibrate simultaneously is
1
4
2
6
3
8
4
12
07
PYQ 2018
medium
physics ID: bitsat-2
Ten tuning forks are arranged in increasing order of frequency such that any two nearest tuning forks produce 4 beats/s. The highest frequency is twice of the lowest. The possible highest and lowest frequencies (in Hz) are:
1
80 and 40
2
100 and 50
3
44 and 22
4
72 and 36
08
PYQ 2018
medium
physics ID: bitsat-2
The wavelengths of two waves are 50cm and 51cm respectively. If the temperature of the room is 20^∘C, then what will be the number of beats produced per second by these waves, when the speed of sound at 0^∘C is 332m/s?
1
24
2
14
3
10
4
None of these
09
PYQ 2019
medium
physics ID: bitsat-2
The frequency of a sonometer wire is 100Hz. When the weights producing the tension are completely immersed in water, the frequency becomes 80Hz and on immersing the weights in a certain liquid, the frequency becomes 60Hz. The specific gravity of the liquid is
1
2
3
4
1.21
10
PYQ 2023
medium
physics ID: bitsat-2
The ratio of the speed of sound in hydrogen gas to the speed of sound in oxygen gas at the same temperature is:
1
2
3
4