List of top Physics Questions on Waves

Ratio of de-Broglie wavelengths of a proton and an alpha particle accelerated through the same potential is:

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 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

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 \[ (\text{The reflecting surfaces of the two mirrors face each other}) \]

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

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 \[ (\text{Least distance of distinct vision}=25\,\text{cm}) \]

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

The linear mass density of a stretched string is $\mu$ and tension is T. The wave velocity is:

નીચેના કયા માપનમાં સુધારણા (Correction) નો સૌથી વધુ સૂચકાંક છે?

ધ્વનિ તરંગો માટે, એક ઓપન-એન્ડેડ પાઇપના 5મા હાર્મોનિક માટે નોડ્સની સંખ્યા \( n \) અને સમાન પાઇપના એક છેડો બંધ હોય તેના 9મા હાર્મોનિક માટે \( m \) હોય, તો ગુણોત્તર \( \frac{n}{m} \) છે:

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 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 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 $=340\,ms^{-1}$)

A wave represented by the equation \[ y=a\cos(kx-\omega t) \] is superposed with another to form a stationary wave such that point \(x=0\) is a node. What is the equation for the other wave?

The fundamental frequency of a sonometer wire increases by \(4\) Hz if the tension in the string is increased by \(21\%\) keeping the length of the wire constant. What will be the new fundamental frequency of the wire if its length is increased by \(25\%\) while keeping the original tension in the wire?

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:

The fundamental frequency of a closed organ pipe of length L is equal to the frequency of the first overtone of an open organ pipe of length L'. The relation between their lengths is:

The displacement of a progressive wave is given by \( y = 0.5 \sin(100t - 2x) \), where x and y are in meters and t is in seconds. The velocity of the wave is:

A string of mass 2.5 kg is under a tension of 200 N. The length of the stretched string is 20 m. If a transverse jerk is struck at one end of the string, the time taken for the disturbance to reach the other end is:

The equation of a simple harmonic progressive wave is given by y = 0.05 (100 t - 0.4 x), where x and y are in meters and t is in seconds. The wave velocity is:

A transverse wave is represented by $y = A \sin(kx - \omega t)$. The maximum particle velocity is