List of top Physics Questions on Wave Motion asked in AP EAPCET

A person at rest hears an electric siren which is stationary. Now the person accelerates at \(2\,\text{m s}^{-2}\) along a straight line path. The distance travelled by him when he hears the frequency of the siren as \(94\%\) of its original value is \((\text{speed of sound} = 330\,\text{m s}^{-1})\):
A car is approaching a cliff at a constant speed. It sounds a horn when it is at 0.9 km from the cliff. The reflected sound of the horn is heard by the car driver after 5 sec. The speed of the car is: (Velocity of sound in air is \( 330 \text{ ms}^{-1} \))
A sound source of 1000 Hz frequency approaches the observer with speed \( 20~\text{ms}^{-1} \). The observed frequency of sound is nearly: (speed of sound in air \( = 340~\text{ms}^{-1} \))
The mass and length of a string are 10 g and 100 cm respectively. If the tension in the string is increased from 400 N to 900 N, then the increase in the frequency of transverse vibration of the string is:
Two identical strings A and B of same material are having tensions $T_{A}$ and $T_{B}$ respectively. If their fundamental frequencies are 450 Hz and 300 Hz, then $T_{A}/T_{B}$ is
A transverse wave is represented by $y = A \sin(kx - \omega t)$. The maximum particle velocity is
An open organ pipe of length $L$ resonates at its fundamental frequency. The wavelength of the sound wave produced is
The apparent frequency of a siren increases as the source approaches a stationary observer. This phenomenon is known as
A string of length \( 1 \text{ m} \) fixed at both ends vibrates in second harmonic. Wavelength is:
Two tuning forks produce frequencies \( 256 \text{ Hz} \) and \( 260 \text{ Hz} \). Number of beats per second is:
A closed organ pipe has fundamental frequency \( 100 \text{ Hz} \). Length of pipe is:
A source of sound moves towards a stationary observer with speed \( 10 \text{ m/s} \). Speed of sound = \( 340 \text{ m/s} \). If original frequency is \( 340 \text{ Hz} \), apparent frequency is:
A wave is represented by \( y = 0.1 \sin(200t - 10x) \). Find wave velocity.
A steel wire of length \(1.25\ \text{m}\) is stretched between two rigid supports. The tension in the wire produces an elastic strain of \(0.14\%\). The fundamental frequency of the wire is
\[ (\text{Density and Young's modulus of steel are }7.7\times10^3\ \text{kg m}^{-3}\text{ and }2.2\times10^{11}\ \text{N m}^{-2}\text{ respectively}) \]
Two trains \(A\) and \(B\) are moving towards each other with speeds \(72\,\text{km h}^{-1}\) and \(36\,\text{km h}^{-1}\) respectively. The train-A whistles at \(640\,\text{Hz}\) frequency. Before the trains meet, frequency of sound heard by a passenger in Train-B is \((v=340\,\text{m s}^{-1})\):
Two wires made of the same material are clamped rigidly at one end and pulled by the same force on the other end. The length and the radius of the first wire are three times those of the second wire. If \(x\) is the increase in the length of the first wire, then the increase in the length of the second wire is
A string of length \(1\text{ m}\) and mass \(490\text{ g}\) is put under a tension of \(25\text{ N}\). A wave of frequency \(120\text{ Hz}\) is sent along it. The speed of this wave is
Among the following, the equation representing a progressive wave is:
\[ \text{(A)}\quad y=2\cos3x\sin10t \] \[ \text{(B)}\quad y=2\sqrt{x-vt} \] \[ \text{(C)}\quad y=3\sin(5x-0.5t)+4\cos(x-0.5t) \] \[ \text{(D)}\quad y=\cos x\sin t+\cos2x\sin2t \]