Q JEE MAIN 2026

The fifth harmonic of a closed organ pipe is found to be in unison with the first harmonic of an...

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Q JEE MAIN 2026

The velocity of sound in air is doubled when the temperature is raised from $0^{\circ} \mathrm{C}$ to $\alpha^{\circ} \mathrm{C}$. The...

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Q JEE MAIN 2026

Two loudspeakers ( $L_1$ and $L_2$ ) are placed with a separation of 10 m , as shown in figure....

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Q JEE MAIN 2026

In an open organ pipe $v_3$ and $v_6$ are $3^{\text {rd }}$ and $6^{\text {th }}$ harmonic frequencies, respectively. If...

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Q JEE MAIN 2020

Two identical strings $X$ and $Z$ made of same material have tension $\mathrm{T}_{\mathrm{x}}$ and $\mathrm{T}_{\mathrm{z}}$ in them. If their fundamental...

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Q JEE MAIN 2020

A wire of density $9 \times 10^{-3} \mathrm{~kg} \mathrm{~cm}^{-3}$ is stretched between two clamps 1 m apart. The resulting strain...

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Q JEE-MAIN 2019

A person standing on an open ground hears the sound of a jet aeroplane, coming from north at an angle...

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Q JEE MAIN 2019

A resonance tube is old and has jagged end. It is still used in the laboratory to determine velocity of...

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Q JEE MAIN 2020

In a resonance tube experiment when the tube is filled with water up to a height of 17.0 cm from...

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Q JEE MAIN 2019

A tuning fork of frequency 480 Hz is used in an experiment for measuring speed of sound (v) in air...

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Q JEE MAIN_2019_

A stationary source emits sound waves of frequency 500 Hz . Two observers moving along a line passing through the...

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Q JEE MAIN 2019

Two sources of sound $S_1$ and $S_2$ produce sound waves of same frequency 660 Hz . A listener is moving...

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Q JEE MAIN 2019

The pressure wave, P = 0.01sin $[1000 \mathrm{t}-3 \mathrm{x}] \mathrm{Nm}^{-2}$ , corresponds to the sound produced by a vibrating blade...

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Q JEE MAIN 2019

A small speaker delivers 2 W of audio output. At what distance from the speaker will one detect 120 dB...

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Q JEE MAIN 2020

A musician using an open flute of length 50 cm produces second harmonic sound waves. A person runs towards the...

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Q JEE MAIN 2020

A sound source S is moving along a straight track with speed v , and is emitting sound of frequency...

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Q JEE MAIN 2020

An object of mass m is suspended at the end of a massless wire of length L and area of...

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Q JEE MAIN 2020

Three harmonic waves having equal frequency $v$ and same intensity $\mathrm{I}_0$, have phase angles $0, \frac{\pi}{4}$ and $-\frac{\pi}{4}$ respectively. When...

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Q JEE MAIN 2020

Assume that the displacement (s) of air is proportional to the pressure difference $(\Delta \mathrm{p})$ created by a sound wave....

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Q JEE MAIN 2020

A one metre long (both ends open) organ pipe is kept in a gas that has double the density of...

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Q JEE-MAIN 2020

A driver in a car, approaching a vertical wall notices that the frequency of his car horn, has changed from...

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Q JEE MAIN 2019

A source of sound S is moving with a velocity of 50 m/s towards a stationary observer. The observer measures...

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Q JEE Main 2019

A train moves towards a stationary observer with speed $34 \mathrm{~m} / \mathrm{s}$. The train sounds a whistle and its...

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Q JEE MAIN 2020

For a transverse wave travelling along a straight line, the distance between two peaks (crests) is 5 m, while the...

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Q JEE MAIN 2019

The pressure wave, P = 0.01sin $[1000 t-3 \times] \mathrm{Nm}^{-2}$ , corresponds to the sound produced by a vibrating blade...

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Q JEE MAIN 2020

The driver of a bus approaching a big wall notices that the frequency of his bus's horn changes from 420...

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Q JEE MAIN 2019

A musician using an open flute of length 50 cm produces second harmonic sound waves. A person runs towards the...

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Q JEE MAIN 2019

Two cars $A$ and $B$ are moving away from each other in opposite directions. Both the cars are moving with...

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Q JEE MAIN 2021

A wire having a linear mass density $9.0 \times 10^{-4} \mathrm{~kg} / \mathrm{m}$ is stretched between two rigid supports with...

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Q JEE MAIN 2019

A closed organ pipe has a fundamental frequency of 1.5 kHz. The number of overtones that can be distinctly heard...

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Q JEE-MAIN 2021

A tuning fork is vibrating at 250 Hz. The length of the shortest closed organ pipe that will resonate with...

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A source and a detector move away from each other in absence of wind with a speed of $...

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Q JEE MAIN 2021

The frequency of a car horn encountered a change from 400 Hz to 500 Hz. When the car approaches a...

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Q JEE MAIN 2021

A closed organ pipe of length $L$ and an open organ pipe contain gases of densities $\rho_1$ and $\rho_2$ respectively....

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Q JEE MAIN 2021

Two cars are approaching each other at an equal speed of 7.2 km/hr. When they see each other, both blow...

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Q JEE MAIN 2021

A signal of 0.1 kW is transmitted in a cable. The attenuation of cable is -5 dB per km and...

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Q JEE MAIN 2021

A student is performing the experiment of resonance column. The diameter of the column tube is 6 cm. The frequency...

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Q JEE Main 2022_

The frequency of echo will be _______ Hz if the train blowing a whistle of frequency 320 Hz is moving...

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Q JEE MAIN 2022

An observer is riding on a bicycle and moving towards a hill at $18 \mathrm{kmh}^{-1}$. He hears a sound from...

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Q JEE MAIN 2022

When a car is approaching the observer, the frequency of horn is 100 Hz. After passing the observer, it is...

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Q JEE MAIN 2022

In an experiment to determine the velocity of sound in air at room temperature using a resonance is observed when...

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Q JEE MAIN 2022

A set of 20 tuning forks is arranged in a series of increasing frequencies. If each fork gives 4 beats...

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Q JEE MAIN 2022

An observer moves towards a stationary source of sound with a velocity equal to one-fifth of the velocity of sound....

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Q JEE MAIN 2022

The velocity of sound in a gas. in which two wavelengths 4.08 m and 4.16 m produce 40 beats in...

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Q JEE MAIN 2022

The first overtone frequency of an open organ pipe is equal to the fundamental frequency of a closed organ pipe....

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Q JEE MAIN 2024

A closed organ pipe 150 cm long gives 7 beats per second with an open organ pipe of length 350"...

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Q JEE_MAIN_2023

A train blowing a whistle of frequency 320 Hz approaches an observer standing on the platform at a speed of...

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Q JEE MAIN 2023

The ratio of speed of sound in hydrogen gas to the speed of sound in oxygen gas at the same...

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Q JEE MAIN 2025

Displacement of a wave is expressed as $x(t)=5 \cos \left(628 \mathrm{t}+\frac{\pi}{2}\right) \mathrm{m}$. The wavelength of the wave when its velocity...

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Q JEE MAIN_2025

In the resonance experiment, two air columns (closed at one end) of 100 cm and 120 cm long, give 15...

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Q JEE MAIN 2023

A car $P$ travelling at $20 \mathrm{~ms}^{-1}$ sounds its horn at a frequency of 400 Hz . Another car $Q$...

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Q JEE MAIN 2023

For a certain organ pipe, the first three resonance frequencies are in the ratio of $1: 3: 5$ respectively. If...

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Q JEE MAIN 2023

An organ pipe 40 cm long is open at both ends. The speed of sound in air is $360 \mathrm{~ms}^{-1}$....

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Q JEE MAIN 2023

The engine of a train moving with speed $10 \mathrm{~ms}^{-1}$ towards a platform sounds a whistle at frequency 400 Hz...

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Q JEE MAIN 2023

A person driving car at a constant speed of 15 m/s is approaching a vertical wall. The person notices a...

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Q JEE MAIN 2024

A closed and an open organ pipe have same lengths. If the ratio of frequencies of their seventh overtones is...

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Q JEE MAIN 2023

A person observes two moving trains, ‘A’ reaching the station and ‘B’ leaving the station with equal speed of 30...

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Q JEE MAINS 2024

The fundamental frequency of a closed organ pipe is equal to the first overtone frequency of an open organ pipe....

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Q JEE-Main_2024

In a closed organ pipe, the frequency of fundamental note is 30Hz. A certain amount of water is now poured...

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Q JEE MAIN 2025

In an experiment with a closed organ pipe, it is filled with water by $\left( {\frac{1}{5}} \right)$ th of its...

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Q JEE MAIN 2025

Consider the sound wave travelling in ideal gases of ${\rm{He}},{\rm{C}}{{\rm{H}}_4}$, and ${\rm{C}}{{\rm{O}}_2}$. All the gases have the same ratio $...

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Q JEE MAIN 2025

Two harmonic waves moving in the same direction superimpose to form a wave $x = {\rm{a}}\cos (1.5{\rm{t}})\cos (50.5{\rm{t}})$ where t...

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Q JEE MAIN 2025

Given below are two statements: one is labelled as Assertion A and the other is labelled as Reason R Assertion...

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