Sound Waves — JEE Main PYQs & Practice Questions

Sound Waves is a Physics chapter in the JEE Main syllabus. This page brings together 43 previous-year and practice questions on Sound Waves, organised into 5 topics: Speed of Sound, Intensity and Loudness, Beats, Resonance and Doppler Effect. Most questions come with a step-by-step solution you can work through free in PrepWiser.

Download Sound Waves JEE Main PYQs as a free PDF (with answer key)

Revise this chapter: Revision notes · Formula sheet

Chapter weightage: how many questions each chapter had per shift in the 2024–26 papers.

Speed of Sound

• The speed of sound is generally greater in solids than in liquids or gases.
• The speed of sound in oxygen at S.T.P. will be approximately: (given, R=8.3 JK⁻¹, γ=1.4)
• Consider the sound wave travelling in ideal gases of He, CH₄, and CO₂. All the gases…
• The ratio of speed of sound in hydrogen gas to the speed of sound in oxygen gas at the…
• Given below are two statements : one is labelled as Assertion A and the other is…
• Sound waves in air are:
• The velocity of sound in air is doubled when the temperature is raised from 0°C to α°C…
• The speed of sound in a gas is v = √(γ P/ρ). If the pressure is doubled while keeping…
• The speed of sound in air at 20°C is approximately:

Intensity and Loudness

• A point source is emitting sound waves of intensity 16 × 10⁻⁸ Wm⁻² at the origin. The…

Beats

• A tuning fork resonates with a sonometer wire of length 1 m stretched with a tension of…
• The velocity of sound in a gas, in which two wavelengths 4.08 m and 4.16 m produce 40…
• Two tuning forks A and B are sounded together giving rise to 8 beats in 2 s. When fork A…
• Two harmonic waves moving in the same direction superimpose to form a wave x=a cos (1.5…
• A closed organ pipe 150 cm long gives 7 beats per second with an open organ pipe of…
• A set of 20 tuning forks is arranged in a series of increasing frequencies. If each fork…
• A tuning fork A of unknown frequency produces 5 beats/s with a fork of known frequency…

Resonance

• In an experiment to determine the velocity of sound in air at room temperature using a…
• In the resonance experiment, two air columns (closed at one end) of 100 cm and 120 cm…
• In a resonance tube experiment when the tube is filled with water up to a height of 17.0…
• A tunning fork of frequency 340 Hz resonates in the fundamental mode with an air column…
• A student is performing the experiment of resonance column. The diameter of the column…

Doppler Effect

• The frequency of echo will be __________ Hz if the train blowing a whistle of frequency…
• A stationary observer receives sound from two identical tuning forks, one of which…
• The driver of a bus approaching a big wall notices that the frequency of his bus's horn…
• A person observes two moving trains, 'A' reaching the station and 'B' leaving the…
• An employee of a factory moving away from his workplace by a car listens to the siren of…
• A train blowing a whistle of frequency 320 Hz approaches an observer standing on the…
• An observer is riding on a bicycle and moving towards a hill at 18 kmh⁻¹. He hears a…
• A siren emitting at 600 Hz approaches a stationary observer at 30 m/s. If the speed of…
• A driver in a car, approaching a vertical wall notices that the frequency of his car…
• Two cars are approaching each other at an equal speed of 7.2 km/hr. When they see each…
• A source approaches a stationary observer. The frequency heard by the observer compared…
• An observer moves directly away from a stationary source at speed vₒ. The apparent…
• Two cars X and Y are approaching each other with velocities 36 km/h and 72 km/h…
• A sound source S is moving along a straight track with speed v, and is emitting, sound…
• The frequency of a car horn encountered a change from 400 Hz to 500 Hz, when the car…
• A person driving car at a constant speed of 15 m / s is approaching a vertical wall. The…
• A car P travelling at 20 ms⁻¹ sounds its horn at a frequency of 400 Hz. Another car Q is…
• When a car is approaching the observer, the frequency of horn is 100 Hz. After passing…
• An observer moves towards a stationary source of sound with a velocity equal to…
• A source and a detector move away from each other in absence of wind with a speed of 20…

More Physics chapters

• Basic Mathematics for Physics
• Units, Dimensions & Errors
• Rectilinear Motion
• Vectors
• Projectile Motion & Relative Motion
• Newton's Laws of Motion
• Friction
• Circular Motion
• Work, Energy & Power
• Centre of Mass & Linear Momentum
• Collision
• Rotational Motion
• Gravitation
• Simple Harmonic Motion
• Elasticity
• Fluid Mechanics
• Surface Tension
• Thermometry & Calorimetry
• Kinetic Theory of Gases
• Thermodynamics
• Heat Transfer
• Mechanical Waves
• Experimental Skills
• Electrostatics I — Charges, Field & Gauss's Law
• Electrostatics II — Potential & Capacitance
• Current Electricity
• Moving Charges & Magnetism
• Magnetism & Matter
• Electromagnetic Induction
• Alternating Current
• Electromagnetic Waves
• Ray Optics
• Wave Optics
• Dual Nature of Radiation & Matter
• Atomic Physics
• Nuclear Physics
• Semiconductors & Electronic Devices
• Communication Systems

Frequently asked questions

How many Sound Waves questions are there for JEE Main?

PrepWiser has 43 Sound Waves questions for JEE Main, grouped into 5 topics such as Speed of Sound, Intensity and Loudness and Beats.

Are these Sound Waves questions from previous-year JEE Main papers?

Yes — most are genuine previous-year questions from past JEE Main papers, and the rest are practice questions written to match the JEE Main pattern and difficulty.

Where can I see the answers and solutions to these Sound Waves questions?

Open any Sound Waves question in PrepWiser (it is free) to attempt it; most come with a step-by-step solution.