Question 1 :
Two strings with mass per unit length of $25\ g/cm$ and $9\ g/cm$ are joined together in series. The reflection coefficient for the vibration waves are

Question 2 :
When a sound wave of wavelength $\lambda$ is propagating in a medium the maximum velocity of the particle is equal to wave velocity. The amplitude of the wave is <br/>

Question 3 :
What is produced at a rigid reflecting plane for a displacement wave?

Question 4 :
Travelling wave has frequency $f$ and particle displacement amplitude $A$. The particle velocity amplitude and particle acceleration amplitude are respectively<br/>

Question 5 :
A transverse sine wave of amplitude $10 cm$ and wavelength $200 cm$ travels from left to right along a long horizontal stretched string with a speed of $100 cm/s$. Take the origin at left end of the string. At time $t=0$, the left end of the string is at the origin and is moving downward. Then the equation of the wave will be (in C.G.S. system)<br/>

Question 6 :
The frequency of vibration of a rod is $200Hz$. If the velocity of sound in air is $340m/s$, the wave length of the sound produced is <br/>

Question 8 :
The initial phase of a pulse travelling on a string is $\pi/3$. The reflected pulse has a phase of

Question 13 :
Sum of two mechanical waves travelling in any direction (having the same frequency),

Question 14 :
A stationary wave is represented by the equation, $y = 3 \cos(x/8) \sin(15t)$ where $x$ and $y$ are in $cm$ and $t$ is in $seconds$. The distance between the consecutive nodes is (in $cm$):

Question 17 :
The equation of a progressive wave is $ y = 8\sin\left[\pi\left(\displaystyle\dfrac{t}{10} - \displaystyle\dfrac{x}{4}\right) + \displaystyle\dfrac{\pi}{4}\right]$. The wavelength of the wave is

Question 18 :
Statement-1 : When a longitudinal pressure wave is reflected at the open end of an organ pipe, the compression pressure wave pulse becomes rarefraction pressure wave pulse during the reflection.<br/><br/>Statement-2 : The phase of the wave changes by when reflected at the open end.<br/>

Question 19 :
For the travelling harmonic wave $y(x,t)=2.0 cos $ $ 2\pi $ (10t-0.0080 x+0.35 ) where x and y are in cm and t in s. Calculate the phase difference between oscillatory motion of two points separated by a distance of $x$<br/>

Question 20 :
The displacement wave in a string is $y = (3\space cm)\sin{6.28}(0.5x - 50t)$ where $x$ is in centimetres and $t$ in seconds. The wavelength and velocity of the wave are

Question 21 :
Which of the following parameters of a wave undergoes a change when wave is reflected from a boundary ?

Question 23 :
Which of the following travelling wave will produce standing wave, with nodes at x = 0, when superimposed on $y = A \sin{(\omega t - kx)}$

Question 24 :
The equation of an incident wave travelling along +X direction is given by $y= A sin (2t-5x)$. This wave gets reflected at a rigid boundary. The equation of the reflected wave is<span><br/></span>

Question 25 :
The displacement y of a wave traveling in the X-direction is given by $y = 10^{-4}\sin({600t-2x+\dfrac{\pi}{3})}$ metres. where $x$ is expressed in metres and $t$ in $seconds$. The speed of the wave motion in $ms^{-1}$ is: