Home Tests Search Rank Profile

Waves Questions

Practice 59 Waves questions with detailed answers and explanations. Free MCQs, PYQs, and mock test questions for NEET, JEE, GATE, SSC and more.

📚

59

Total Questions

🟢

7

Easy

🟡

39

Medium

🔴

13

Hard

Practice by Exam:Physics(58)PHYSICS(1)

About Waves — practice questions, PYQs & concepts

Waves is a frequently-tested topic on Physics, PHYSICS. ExamTest.live currently lists 59 Waves questions spanning previous-year papers from 2026 to 2026, each with worked solutions and a step-by-step explanation. Use the filters on this page to focus on a specific exam, difficulty level or year — every answer key is free, no sign-up required.

Waves weight in competitive exams

Across our Waves question bank, the largest sources are Physics (58) and PHYSICS (1). Click any exam chip above to drill down to that exam-specific question set.

How to use this page

Start easy: 7 easy Waves questions are available — build fluency before moving up.
Target weak years: Use the year filter to focus on the most recent 2026 paper or older PYQs you have not attempted.
Time yourself: Every question shows the average solve time so you can benchmark your speed against other students.
Read every explanation: Even on questions you got right — the explanation often surfaces a faster approach you can reuse.

All Waves Questions(1–59 of 59)

Filter:

Q1easymcqPhysicsAIEEE 20042026

0% accuracy

The displacement y of a particle in a medium can be expressed as y = 1 0^{- 6} sin (100 t + 20 x + π /4) m, where t is in seconds and x in meter. The speed of the wave is:

Q2easymcqPhysicsNEET (UG) 20172026

0% accuracy

Two cars moving in opposite directions approach each other with speed of 22 m/s and 16.5 m/s respectively. The driver of the first car blows a horn having a frequency 400 Hz . The frequency heard by the driver of the second car is: (velocity of sound 340 m/s)

Q3hardmcqPhysicsNEET (UG) 20172026

0% accuracy

The two nearest harmonics of a tube closed at one end and open at the other end are 220 Hz and 260 Hz . What is the fundamental frequency of the system?

Q4mediummcqPhysicsAIEEE 20072026

0% accuracy

A sound absorber attenuates the sound level by 20 dB . The intensity decreases by a factor of:

Q5mediummcqPhysicsAIEEE 20062026

0% accuracy

A string is stretched between fixed points separated by 75 cm . It is observed to have resonant frequencies of 420 Hz and 315 Hz . There are no other resonant frequencies between these two. Then, the lowest resonant frequency for this string is:

Q6mediummcqPhysicsAIEEE 20062026

0% accuracy

A whistle producing sound waves of frequencies 9500 Hz and above is approaching a stationary person with speed v m/s . The velocity of sound in air is 300 m/s . If the person can hear frequencies up to a maximum of 10000 Hz, the maximum value of v up to which he can hear the whistle is:

Q7mediummcqPhysicsAIEEE2026

An observer moves towards a stationary source of sound, with a velocity one fifth of the velocity of sound. What is the percentage increase in the apparent frequency?

Q8hardmcqPhysicsNEET 20172026

The two nearest harmonics of a tube closed at one end and open at other end are 220 Hz and 260 Hz . What is the fundamental frequency of the system?

Q9mediummcqPhysicsNEET (UG) 20182026

The fundamental frequency in an open organ pipe is equal to the third harmonic of a closed organ pipe. If the length of the closed organ pipe is 20 cm, the length of the open organ pipe is:

Q10mediummcqPhysicsNEET (UG) 20182026

A tuning fork is used to produce resonance in a glass tube. The length of the air column in this tube can be adjusted by a variable piston. At room temperature of 2 7^{\circ} C two successive resonances are produced at 20 cm and 73 cm of column length. If the frequency of the tuning fork is 320 Hz, the velocity of sound in air at 2 7^{\circ} C is:

Q11mediummcqPHYSICSNEET 20192026

A tuning fork with a frequency of 800 Hz produces resonance in a resonance column tube with the upper end open and the lower end closed by the water surface. Successive resonances are observed at lengths of 9.75 cm, 31.25 cm, and 52.75 cm . The speed of the sound in the air is:

Q12mediummcqPhysicsNEET 2020 E12026

In a guitar, two strings A and B made of same material are slightly out of tune and produce beats of frequency 6 Hz . When tension in B is slightly decreased, the beat frequency increases to 7 Hz . If the frequency of A is 530 Hz, the original frequency of B will be:

Q13mediummcqPhysicsNEET 20222026

If the initial tension on a stretched string is doubled, then the ratio of the initial and final speeds of a transverse wave along the string is:

Q14easymcqPhysicsNEET 20232026

The ratio of frequencies of fundamental harmonic produced by an open pipe to that of a closed pipe having the same length is:

Q15mediummcqPhysicsAIEEE2026

The function sin^{2} (ω t) represents:

Q16mediummcqPhysicsNEET 20172026

Two cars moving in opposite directions approach each other with speed of 22 m/s and 16.5 m/s respectively. The driver of the first car blows a horn having a frequency 400 Hz . The frequency heard by the driver of the second car is [velocity of sound 340 m/s]:

Q17mediummcqPhysicsAIEEE2026

When two tuning forks (fork 1 and fork 2) are sounded simultaneously, 4 beats per second are heard. Now, some tape is attached on the prong of the fork 2 . When the tuning forks are sounded again, 6 beats per second are heard. If the frequency of fork 1 is 200 Hz, then what was the original frequency of fork 2 ?

Q18hardmcqPhysicsAIEEE 20032026

A metal wire of linear mass density 9.8 g/m is stretched with a tension of 10 kg-wt between two rigid supports 1 metre apart. The wire passes at its middle point between the poles of a magnet and it vibrates in resonance when carrying an alternating current of frequency n . The frequency n of the alternating source is:

Q19mediummcqPhysicsAIEEE 20032026

A tuning fork of known frequency 256 Hz makes 5 beats per second with the vibrating string of a piano. The beat frequency decreases to 2 beats per second when the tension in the piano string is slightly increased. The frequency of the piano string before increasing the tension was:

Q20mediummcqPhysicsAIEEE 20032026

The displacement y of wave travelling in the x -direction is given by y = 1 0^{- 4} sin (600 t - 2 x + π /3) metres, where x is in metres and t in seconds. The speed of the wave-motion in m/s is:

Q21mediummcqPhysicsAIEEE 20092026

A motor cycle starts from rest and accelerates along a straight path at 2 m/s^{2} . At the starting point of the motor cycle there is a stationary electric siren. How far has the motor cycle gone when the driver hears the frequency of the siren at 94% of its value when the motor cycle was at rest? (speed of sound = 330 m s^{- 1}).

Q22mediummcqPhysicsAIEEE 20092026

Three sound waves of equal amplitudes have frequencies (ν - 1), ν, (ν + 1) . They superpose to give beats. The number of beats produced per second will be:

Q23mediummcqPhysicsAIEEE2026

The equation of a wave on a string of linear mass density 0.04 kg m^{- 1} is given by y = 0.02 (m) sin [2 π (\frac{t}{0.04 ( s )} - \frac{x}{0.50 ( m )})] . The tension in the string is:

Q24mediummcqPhysicsFIITJEE AIEEE 2011 (Set Q)2026

The transverse displacement y (x, t) of a wave on a string is given by y (x, t) = e^{- (a x^{2} + b t^{2} + 2 ab x t)} . This represents a:

Q25mediummcqPhysicsJEE Main2026

A sonometer wire of length 1.5 m is made of steel. The tension in it produces an elastic strain of 1% . What is the fundamental frequency of steel if density and elasticity of steel are 7.7 \times 1 0^{3} kg/m^{3} and 2.2 \times 1 0^{11} N/m^{2} respectively?

Q26mediummcqPhysicsPhysics

0% accuracy

Two vibrating tuning forks produce progressive waves given by y1 = 4 sin 500 πt and y2 = 2 sin 506 πt. Number of beats produced per minute is :

Q27mediummcqPhysicsPhysics

0% accuracy

Two waves are represented by the equations y_{1} = a sin (ω t + k x + 0.57) m and y_{2} = a cos (ω t + k x) m . The phase difference between them is:

Q28mediummcqPhysicsPhysics

0% accuracy

Sound waves travel at 350 m/s through warm air and at 3500 m/s through brass. The wavelength of a 700 Hz acoustic wave as it enters brass from warm air:

Q29hardmcqPhysicsPhysics

Three sound waves of equal amplitudes have frequencies (n - 1), n, (n + 1) . They superimpose to give beats. The number of beats produced per second will be:

Q30hardmcqPhysicsPhysics

A siren emitting a sound of frequency 800 Hz moves away from an observer towards a cliff at a speed of 15 ms^{- 1} . Then, the frequency of sound that the observer hears in the echo reflected from the cliff is: (Take velocity of sound in air = 330 ms^{- 1})

Q31mediummcqPhysicsPhysics

The second overtone of an open organ pipe has the same frequency as the first overtone of a closed pipe L meter long. The length of the open pipe will be:

Q32mediummcqPhysicsPhysics

Two wires under tension T have frequency 600 Hz . Fractional increase in tension of one to produce 6 beats/s is:

Q33mediummcqPhysicsPhysics

Two sound waves with wavelength 5.0 m and 5.5 m respectively, each propagates in gas with a velocity of 330 m/s . We expect the following number of beats per seconds:

Q34mediummcqPhysicsPhysics

A transverse wave propagating along x-axis is represented by: y (x, t) = 8.0 sin (0.5 π x - 4 π t - \frac{π}{4}) Where x is in meters and t is in seconds. The speed of the wave is :

Q35mediummcqPhysicsPhysics

The time of reverberation of a room A is one second. What will be the time (in seconds) of reverberation of a room, having all the dimensions double of those of room A ?

Q36hardmcqPhysicsPhysics

The wave described by y = 0.25 sin (10 π x - 2 π t), where x and y are in meters and t in seconds, is a wave travelling along the:

Q37mediummcqPhysicsPhysics

Two points are located at a distance of 10 m and 15 m from the source of oscillation. The period of oscillation is 0.05 sec and the velocity of the wave is 300 m/sec . What is the phase difference between the oscillations of the two points?

Q38mediummcqPhysicsPhysics

Two periodic waves of intensities I_{1} and I_{2} pass through a region at the same time in the same direction. The sum of the maximum and minimum intensities is:

Q39hardmcqPhysicsPhysics

Each of the two strings of length 51.6 cm and 49.1 cm are tensioned separately by 20 N force. Mass per unit length of both the strings is same and equal to 1 g/m . When both the strings vibrate simultaneously, the number of beats is:

Q40hardmcqPhysicsPhysics

The driver of a car travelling with speed 30 m/sec towards a hill sounds a horn of frequency 600 Hz . If the velocity of sound in air is 330 m/s, the frequency of reflected sound as heard by driver is:

Q41hardmcqPhysicsPhysics

A wave in a string has an amplitude of 2 cm . The wave travels in the + v e direction of x axis with a speed of 128 m/sec and it is noted that 5 complete waves fit in 4 m length of the string. The equation describing the wave is:

Q42mediummcqPhysicsPhysics

The electric field part of an electromagnetic wave in a medium is represented by E_{x} = 0, E_{y} = 2.5 N/C cos [2 π \times 1 0^{6} \frac{rad}{s} t - π \times 1 0^{- 2} \frac{rad}{m} x], E_{z} = 0 . The wave is:

Q43mediummcqPhysicsPhysics

A transverse wave is represented by y = A sin (ω t - k x) . For what value of the wavelength is the wave velocity equal to the maximum particle velocity?

Q44mediummcqPhysicsPhysics

A tuning fork of frequency 512 Hz makes 4 beats per second with the vibrating string of a piano. The beat frequency decreases to 2 beats per sec when the tension in the piano string is slightly increased. The frequency of the piano string before increasing the tension was:

Q45easymcqPhysicsPhysics

Which of the following statements is false for the properties of electromagnetic waves?

Q46hardmcqPhysicsPhysics

A uniform rope of length L and mass m_{1}, hangs vertically from a rigid support. A block of mass m_{2} is attached to the free end of the rope. A transverse pulse of wavelength λ_{1} is produced at the lower end of the rope. The wavelength of the pulse when it reaches the top of the rope is λ_{2} . The ratio λ_{2} / λ_{1} is:

Q47mediummcqPhysicsPhysics

The equation of a simple harmonic wave is given by y = 3 sin \frac{π}{2} (50 t - x) . The ratio of maximum particle velocity to the wave velocity is:

Q48hardmcqPhysicsPhysics

A train moving at 220 ms^{- 1} towards an object emits 1000 Hz sound. Some sound reflects back as an echo. The frequency of the echo detected by the driver is: (v_{s} = 330 ms^{- 1})

Q49mediummcqPhysicsPhysics

When a string is divided into three segments of length l_{1}, l_{2} and l_{3}, the fundamental frequencies of these three segments are ν_{1}, ν_{2} and ν_{3} respectively. The original fundamental frequency (ν) of the string is:

Q50mediummcqPhysicsPhysics

Two sources of sound placed close to each other, are emitting progressive waves given by y_{1} = 4 sin 600 π t and y_{2} = 5 sin 608 π t . An observer located near these two sources of sound will hear:

Q51mediummcqPhysicsPhysics

A wave travelling in the + x direction having displacement along y as 1 m, wavelength 2 π m and frequency \frac{1}{π} Hz is represented by:

Q52easymcqPhysicsPhysics

If we study the vibration of a pipe open at both ends, then which of the following statements is not true?

Q53mediummcqPhysicsPhysics

A source of unknown frequency f_{u} gives 4 beats/s with a known source of 250 Hz . The second harmonic of f_{u} (2 f_{u}) gives 5 beats/s with a source of 513 Hz . The unknown frequency is:

Q54easymcqPhysicsPhysics

If n_{1}, n_{2} and n_{3} are the fundamental frequencies of three segments into which a string is divided, then the original fundamental frequency n of the string is given by:

Q55mediummcqPhysicsPhysics

The number of possible natural oscillations of air column in a pipe closed at one end of length 85 cm whose frequencies lie below 1250 Hz are: (velocity of sound = 340 ms^{- 1})

Q56mediummcqPhysicsPhysics

A speeding motorcyclist sees traffic jam ahead of him. He slows down to 36 km/hour . He finds that traffic has eased and a car moving ahead of him at 18 km/hour is honking at a frequency of 1392 Hz . If the speed of sound is 343 m/s, the frequency of the honk as heard by him will be:

Q57hardmcqPhysicsPhysics

A source of sound S emitting waves of frequency 100 Hz and an observer O are located at some distance from each other. The source is moving with a speed of 19.4 ms^{- 1} at an angle of 6 0^{\circ} with the source-observer line. The observer is at rest. The apparent frequency observed by the observer (velocity of sound in air 330 ms^{- 1}), is:

Q58hardmcqPhysicsPhysics

A string is stretched between fixed points separated by 75.0 cm . It is observed to have resonant frequencies of 420 Hz and 315 Hz . There are no other resonant frequencies between these two. The lowest resonant frequency for this string is:

Q59easymcqPhysicsPhysics

An air column, closed at one end and open at the other, resonates with a tuning fork when the smallest length of the column is 50 cm . The next larger length of the column resonating with the same tuning fork is:

Frequently Asked Questions

How many Waves questions are on ExamTest.live?▼

We have 59 Waves questions spread across 1 pages, covering easy, medium, and hard difficulty levels with detailed explanations.

Are Waves MCQs free?▼

Yes. All Waves questions, answers, and explanations on ExamTest.live are completely free. No account or subscription required.

Which exams include Waves questions?▼

Waves questions are commonly asked in Physics, PHYSICS. You can filter by exam using the links above.

How do I practice Waves questions effectively?▼

Start with easy questions to build confidence, then tackle medium and hard ones. Use the filter buttons to sort by difficulty. Reveal the answer only after attempting each question, and read the explanation thoroughly.