List of top Physics Questions on Waves asked in TS EAMCET

The speed of a progressive transverse wave on a string is \(18\ \mathrm{ms^{-1}}\). If the phase difference between two points on the string separated by a distance of \(3\) cm is \(90^\circ\), then the frequency of the transverse wave on the string is
A source producing sound of frequency \(990\) Hz and an observer are initially at rest. If both the source and observer start moving simultaneously towards each other with accelerations \(2\ \mathrm{ms^{-2}}\) and \(4\ \mathrm{ms^{-2}}\) respectively, then the frequency of sound heard by the observer at a time \(t=5\) s is \[ (\text{Speed of sound in air}=340\ \mathrm{ms^{-1}}) \]
Two plane mirrors \(A\) and \(B\) are placed parallel to each other with a separation of \(2\,\text{m}\) between them. If an object is placed between the mirrors at a distance of \(60\,\text{cm}\) from mirror \(B\), then the distance of the second nearest image seen in mirror \(B\) from mirror \(A\) is \[ (\text{The reflecting surfaces of the two mirrors face each other}) \]
If the length of a compound microscope is \(100\,\text{cm}\) and the focal length of its objective is \(5\,\text{cm}\), then the difference between the magnifications of the microscope when the final image forms at infinity and at the near point is \[ (\text{Least distance of distinct vision}=25\,\text{cm}) \]
Two observers \(A\) and \(B\) are moving towards a stationary source of sound with speeds \(0.8v_0\) and \(0.6v_0\) respectively, where \(v_0\) is the speed of sound in air. The ratio of the frequencies of the sound heard by the observers \(A\) and \(B\) is
In Young's double slit experiment, if the distance between the first dark fringe and the second bright fringe on the same side of the central maximum is \(1.5\,\text{mm}\), then the distance between the first dark fringe on one side and the second bright fringe on the other side of the central maximum is
A wire of length \(1.2\,\text{m}\) is subjected to a tension of \(240\,\text{N}\). If the frequencies of two successive modes of vibration of the wire are \(200\,\text{Hz}\) and \(250\,\text{Hz}\), then the mass of the wire is
Two stationary sources P and Q produce sounds of equal frequency of \(170\,Hz\). The velocity with which an observer has to move from source P towards source Q such that 8 beats are heard per second by the observer is:
If sound waves of frequency 169 Hz are incident horizontally on a perfectly rigid vertical wall, then the shortest distance from the wall at which the air particle will have maximum amplitude of vibration is:
A wire of length 100 cm is clamped between two rigid supports and vibrates in fundamental mode. If amplitude at midpoint is A, distance between two points having amplitude $\frac{A}{\sqrt{2}}$ is:}
Lengths of two open pipes are in ratio 5:6. If 8 beats per second are heard when both vibrate in fundamental mode, find frequency of third harmonic of longer pipe.
The frequency of a closed pipe is $f_1$ if it vibrates with two nodes and is $f_2$ if it vibrates with three nodes. If the difference between the frequencies $f_1$ and $f_2$ is 200 Hz, then the length of the pipe is (Speed of sound in air $=340\,ms^{-1}$)
The frequency of a tuning fork P is 1.5% more than the frequency of tuning fork Q and the frequency of another tuning fork R is 2.5% less than the frequency of tuning fork Q. If 8 beats are produced per second when P and R are vibrated together, then the frequency of tuning fork R is
The length of an open pipe is half of the length of another closed pipe. When the two pipes are vibrated, four nodes are formed in both the cases. The ratio of the frequencies of the open and the closed pipes is:
A car moving towards a cliff emits sound of frequency 'n'. If the difference in frequencies of the horn and its echo heard by the driver of the car is 10% of 'n', then the speed of the car is nearly (Speed of sound in air is 336ms$^{-1}$)
The air columns in two tubes closed at one end vibrating in their fundamental modes produce 2 beats per second. The number of beats produced per second when the same tubes are vibrated in their fundamental mode with their both ends open are
The radio horizon of a transmitting antenna of height 39.2 m is (Radius of the earth = 6400 km)
A metal rod of length 125 cm is clamped at its midpoint. If the speed of the sound in the metal is 5000ms\(^{-1}\), then the fundamental frequency of the longitudinal vibrations of the rod is
An air column in a tube of length 50 cm, closed at one end is vibrating in its fifth harmonic. The phase difference between a particle at the open end and a particle at 42 cm from the open end is
The frequency of sound heard by an observer moving towards a stationary source with certain speed is $n_1$ and if the observer moves away from the same source with same speed, the frequency of sound heard by the observer is $n_2$. If the speed of sound in air is 340ms$^{-1}$ and $n_1 : n_2 = 71:65$, then speed of observer is
Two tuning forks of frequencies 320 Hz and 323 Hz are vibrated together. The time interval between a maximum sound and its adjacent minimum sound heard by an observer is
A radar sends sound waves of frequency 'f' towards an aeroplane moving away from it. If the difference in the frequencies of waves sent and received by the radar is 10% of 'f', then the speed of the aeroplane in $ms^{-1}$ is nearly (Speed of sound in air = 342 $ms^{-1}$)
When a long hollow steel pipe is struck with a hammer at one end, two sounds are heard at the other end. If the time interval between the two sounds heard is 0.53 s, then the length of the pipe is
(Speed of sound in steel is 5100 $ms^{-1}$ and speed of sound in air is 330 $ms^{-1}$)
A wire under a tension of 144 N vibrating in its fundamental mode gives 5 beats per second with a tuning fork. When the tension applied to the wire is increased to 169 N, the number of beats heard per second remains the same. The frequency of the tuning fork is
The successive frequencies produced by an organ pipe are 330 Hz, 440 Hz and 550 Hz. If the speed of sound in air is 330 m/s then the length of the organ pipe is