Pressure Wave vs Displacement Wave
Trending Questions
Q.
Two sources of sound A and B produces the wave of 350 Hz, they vibrate in the same phase. The particle P is vibrating under the influence of these two waves, if the amplitudes at the point P produced by the two waves is 0.3 mm and 0.4 mm, then the resultant amplitude of the point P will be when AP - BP = 25 cm and the velocity of sound is 350 m/sec
0.7 mm
0.1 mm
0.5 mm
0.2 mm
Q. What is the displacement amplitude of a sound wave having frequency of 100 Hz and pressure amplitude 10 Pa?
[speed of sound in air =340 m/s and density of air =1.29 kg/m3]
[speed of sound in air =340 m/s and density of air =1.29 kg/m3]
- 2.5×10−5 m
- 3.6×10−5 m
- 4.5×10−5 m
- 1.5×10−5 m
Q. Consider the following statements about sound passing through a gas.
(A) The pressure of the gas at a point oscillates in time.
(B) The position of a small layer of the gas oscillates in time.
(a) Both A and B are correct.
(b) A is correct but B is wrong.
(c) B is correct but A is wrong.
(d) Both A and B are wrong.
(A) The pressure of the gas at a point oscillates in time.
(B) The position of a small layer of the gas oscillates in time.
(a) Both A and B are correct.
(b) A is correct but B is wrong.
(c) B is correct but A is wrong.
(d) Both A and B are wrong.
Q. If the pressure amplitude of sound wave in a medium is tripled and the wavelength is doubled then the amplitude of displacement of the particles in the medium becomes x times the initial value. The value of x is
- 5
- 3
- 2
- 6
Q. in a simle harmonic wave , minimum dis†an ce between particle in same phase always having equal velocit i
Q. Maximum sound pressure tolerable by the human ear is 30 N/m2. For a sound of frequency 103 Hz and speed 300 m/s, the maximum displacement of particles of the medium is
[density of air =1.5 kg/m3)]
[density of air =1.5 kg/m3)]
- 16π×10−4 m
- 15π×10−4 m
- 14π×10−4 m
- 13π×10−4 m
Q. If the pressure variation in the medium is represented by equation P=ΔPosin(kx−ωt) then the resulting density variation in medium is suitably represented by equation
- ρ=Δρocos(kx−ωt)
- ρ=−Δρosin(kx−ωt)
- ρ=−Δρocos(kx−ωt)
- ρ=Δρosin(kx−ωt)
Q. The variation of pressure in a medium due to propagation of sound is represented as
![](https://df0b18phdhzpx.cloudfront.net/ckeditor_assets/pictures/1012730/original_27.png)
Which of the following graph correctly represents the displacement of particles of the medium?
![](https://df0b18phdhzpx.cloudfront.net/ckeditor_assets/pictures/1012730/original_27.png)
Which of the following graph correctly represents the displacement of particles of the medium?
Q. For a sound wave travelling towards +x direction, sinusoidal longitudinal displacement ξ at a certain time is given as a function of x(Figure). If bulk modulus of air is B=5×105N/m2, the variation of pressure excess will be
![](https://s3-us-west-2.amazonaws.com/infinitestudent-images/ckeditor_assets/pictures/9693/content_11.png)
![](https://s3-us-west-2.amazonaws.com/infinitestudent-images/ckeditor_assets/pictures/9693/content_11.png)