List of top Physics Questions on Waves asked in TS EAMCET

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:

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.

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:}

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

An observer moves towards a source at rest with a speed of 25% of the speed of sound in air. If the frequency of the sound emitted by the source is 200 Hz, then the frequency of sound heard by the observer is:

In a medium, a source produces 60 crests and 60 troughs in a time of 0.2 s. If the distance between a crest and its adjacent trough is 100 cm, then the speed of sound in the medium is:

For an aperture of $5 \times 10^{-3}\,\mathrm{m}$ and a monochromatic light of wavelength $\lambda$, the distance for which ray optics becomes a good approximation is $50\,\mathrm{m}$, then $\lambda =$

The property of light that explains the formation of coloured images due to thick lenses is

A compound microscope has an objective of focal length $1.25\,\mathrm{cm}$ and an eyepiece of focal length $5\,\mathrm{cm}$ separated by a distance of $7.5\,\mathrm{cm}$. The total magnification produced by the microscope when the final image forms at infinity is

The equation of a transverse wave propagating on a stretched string is given by $y = 3\sin(4x + 200t)$, where $x$ and $y$ are in metre and the time $t$ is in second. If the tension applied to the string is $500\,\mathrm{N}$, the linear density of the string is

If the lengths of the open and closed pipes are in the ratio of $2:3$, then the ratio of the frequencies of the third harmonic of the open pipe and the fifth harmonic of the closed pipe is