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Waves and Sound — JEE Main & Advanced NSEP PYQs

25 previous year questions from Waves and Sound with answers and solutions. Numbered list, year tags, and one-tap solutions — built for serious JEE / NEET practice.

25 questionsNSEPSolutions on every page
1

Two wires made of the same material, one thick and the other thin, are connected to form a composite wire. The composite wire is subjected to some tension. A wave travelling along

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Two identical loudspeakers, placed close to each other inside a room, are supplied with the same sinusoidal voltage. One can imagine a pattern around the loudspeakers with areas of

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The frequency of the sound produced by a siren increases from 400 Hz to 1200 Hz while its amplitude remains the same. Therefore, the ratio of the intensity of the 1200 Hz wave to t

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Two factories are sounding their sirens at 400 Hz each. A man walks from one factory towards the other at a speed of 2 ~m / s . the speed of sound is 320 ~m / s . The number of bea

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A vibrator of frequency f is placed near one end of a long cylindrical tube. The tube is fitted with a movable piston at the other end. An observer listens to the sound through a s

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A whistle whose air column is open at both ends has a fundamental frequency 500 Hz . The whistle is dipped in water such that half of it remains out of water. What will be the fund

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A man stands at rest in front of a large wall. A sound source of frequency 400 Hz is placed between him and the wall. The source is now moved towards the wall at a speed of 1 ~m /

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In a stationary wave

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An empty earthen pitcher is kept under a water tap and starts filling with water as the tap is opened. The pitch of the sound produced

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A student while performing experiment with a sonometer with bridges separated by a distance of 80 cm , missed out some of the observations. However, he claimed that the three reson

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The combination of a steel wire (length 80 cm , area of cross section 1 ~mm ^2 ) and an aluminium wire (length 60 cm , area of cross section 3 ~mm ^2 ) joined end to end is stretch

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Two wires, made of same material, one thick and the other thin are joined to form one composite wire. The composite wire is subjected to the same tension throughout. A wave travels

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Two factories are sounding their sirens at 400 Hz each. A man walks from one factory towards the other at a speed of 2 ~m / s . The velocity of sound is 320 ~m / s . The number of

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In many situations the point source emitting a wave starts moving, through the medium, with velocity V greater than the wave velocity in that medium. In such a case when source vel

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A sound source of constant frequency travels with a constant velocity past an observer. When it crosses the observer the sound frequency sensed by the observer changes from 449 Hz

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The frequency of the third overtone of a closed end organ pipe equals the frequency of the fifth harmonic of an open end organ pipe. Ignoring end correction, the ratio of their len

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The intensity of sound at a point P is I₀ , when the sounds reach this point directly and in same phase from two identical sources S ₁ and S ₂ . The power of S ₁ is now reduced by

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A sound source of fix frequency is in unison with an open end organ pipe of length 30.0 cm and a close end organ pipe of length 23.0 cm (both of same diameter). Both pipes are soun

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A rope of mass m and length L is suspended vertically. A mas M is suspended from bottom of the rope. A transverse wave is produced on the rope, which travels the length of rope in

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When the speaker S₁ is switched O N , the sound intensity at a point P in a room is 80 dB . But when the speaker S₂ is switched ON ( S₁ is switched OFF), the sound intensity at the

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A rope of mass M and length L hangs vertically. Time needed for a transverse pulse to travel from its bottom end to the support is

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A police car, moving at speed of 108 ~km / hour, approaches a truck moving at 72 ~km / hour in opposite direction. The natural frequency of the siren of the car is 800 Hz and the s

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An open-end organ pipe 30 cm in length and a closed-end organ pipe 23 cm in length, both of equal diameter, are each sounding their first overtone and both are in unison at 1100 Hz

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Which of the following functions does not represent a traveling wave

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Two plane progressive waves travelling on a string as aligned & y₁=2.5 10⁻³ (30 x-420 t) & y₂=2.5 10⁻³ (30 x+420 t) aligned superimpose to produce a standing wave. The variables x

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