XI NCERT Physics • Chapter 14
Waves · 50 MCQs

50 Objective Questions on Waves

Single consolidated sheet of 50 MCQs covering NCERT basics, CBSE board favourites and JEE/NEET‑level applications from the chapter “Waves”. Attempt them in one sitting to simulate an actual test.

CBSE – Class XI concept check
NEET pattern: sound, intensity, Doppler
JEE Main/Advanced: strings & standing waves
▶ Jump to questions 📝 See exam mix
Distribution in this set
Based on past CBSE, NEET and JEE trends, aligned with your question text below.
Concept MCQs
(CBSE)
Application MCQs
(NEET)
Advanced MCQs
(JEE)

How this sheet is structured

Exam mix at a glance

The questions below are already tagged inside the text as “CBSE – Class XI”, “NEET”, “JEE Main” and “JEE Advanced”. You do not need extra section headings; simply follow the exam tag to know the original flavour of each question and use filters while revising.

📚
CBSE concept check

Items starting with “(Exam: CBSE – Class XI)” test pure NCERT theory and simple formula recall such as definition of a wave, units, basic parameters and superposition ideas.

Try without pen first Great warm‑up
🩺
NEET‑style applications

“(Exam: NEET)” questions focus on speed of sound, intensity, phase, beats and Doppler effect — exactly the quick plug‑in numericals and conceptual MCQs you see in NEET and allied exams.

Formula + units Calculation in 30–40 s
🎯
JEE Main & Advanced flavour

“(Exam: JEE Main)” and “(Exam: JEE Advanced)” cover standing waves in strings and pipes, displacement relations, \(\omega, k, v\), energy transport and trickier conceptual patterns.

Graph questions likely Ideal for PYQ practice

Start here

50 MCQs on Waves

Paste your full question set directly below this paragraph. Each item already carries its exam tag, so keep your existing structure like: stem line + small muted “(Exam: …)” span.

🎯 Knowledge Check

Physics — WAVES

50 Questions Class 11 MCQs
1
A wave is a means of transfer of
(Exam: CBSE – Class XI)
2
The SI unit of frequency of a wave is
(Exam: CBSE – Class XI)
3
Which of the following is a transverse wave?
(Exam: CBSE – Class XI)
4
The distance between two successive crests of a wave is called
(Exam: CBSE – Class XI)
5
The relation between wave speed \(v\), frequency \(f\), and wavelength \(\lambda\) is
(Exam: CBSE – Class XI)
6
In a longitudinal wave, particles vibrate
(Exam: CBSE – Class XI)
7
The maximum displacement of a particle from its mean position is
(Exam: CBSE – Class XI)
8
Sound waves in air are
(Exam: CBSE – Class XI)
9
The time taken by a wave to travel one wavelength is equal to
(Exam: CBSE – Class XI)
10
Which quantity remains unchanged when a wave enters a new medium?
(Exam: CBSE – Class XI)
11
The phenomenon of superposition of waves leads to
(Exam: CBSE – Class XI)
12
Two waves are said to be coherent if they have the same
(Exam: CBSE – Class XI)
13
Beats are produced due to interference of waves having
(Exam: CBSE – Class XI)
14
The number of beats per second is equal to
(Exam: CBSE – Class XI)
15
A stationary wave is formed due to superposition of
(Exam: CBSE – Class XI)
16
In a stationary wave, nodes are points of
(Exam: CBSE – Class XI)
17
The distance between two consecutive nodes in a standing wave is
(Exam: CBSE – Class XI)
18
The fundamental frequency of a stretched string of length \(L\) is
(Exam: CBSE – Class XI)
19
The pitch of a sound depends on its
(Exam: CBSE – Class XI)
20
Loudness of sound depends on
(Exam: CBSE – Class XI)
21
The speed of sound in air increases with
(Exam: CBSE – Class XI)
22
The speed of a transverse wave on a string depends on
(Exam: NEET)
23
The intensity of a wave is proportional to
(Exam: NEET)
24
Phase difference between two points separated by \(\lambda/4\) is
(Exam: NEET)
25
Doppler effect is observed when there is relative motion between
(Exam: NEET)
26
The apparent increase in frequency when the source approaches the observer is due to
(Exam: NEET)
27
In Doppler effect, if source and observer move away, the observed frequency
(Exam: NEET)
28
The number of antinodes in the \(n\)th harmonic of a stretched string is
(Exam: JEE Main)
29
Which harmonic is absent in a closed organ pipe?
(Exam: JEE Main)
30
The fundamental frequency of a closed organ pipe of length \(L\) is
(Exam: JEE Main)
31
If tension in a string is doubled, the wave speed becomes
(Exam: JEE Main)
32
Energy in a wave is transported in the direction of
(Exam: JEE Main)
33
The speed of sound in a gas is proportional to
(Exam: JEE Main)
34
The quality or timbre of sound depends on
(Exam: JEE Main)
35
Which quantity remains constant in a stationary wave?
(Exam: JEE Main)
36
In standing waves, there is no net transfer of
(Exam: JEE Advanced)
37
The beat phenomenon is an example of
(Exam: JEE Advanced)
38
The phase difference between two successive antinodes is
(Exam: JEE Advanced)
39
For a progressive wave, particle velocity is maximum when displacement is
(Exam: JEE Advanced)
40
The average power transmitted by a wave on a string is proportional to
(Exam: JEE Advanced)
41
The Doppler effect does not occur for
(Exam: JEE Advanced)
42
In a stretched string, if mass per unit length is quadrupled, speed becomes
(Exam: JEE Advanced)
43
The displacement equation of a progressive wave is
(Exam: JEE Advanced)
44
The angular frequency \(\omega\) is related to frequency \(f\) by
(Exam: JEE Advanced)
45
The wave number \(k\) is given by
(Exam: JEE Advanced)
46
The speed of sound in air at constant pressure varies with temperature as
(Exam: JEE Advanced)
47
Which of the following waves requires a medium?
(Exam: JEE Advanced)
48
If frequency of a wave is doubled and speed remains constant, wavelength becomes
(Exam: JEE Advanced)
49
The energy density of a wave is proportional to
(Exam: JEE Advanced)
50
In a stationary wave pattern, the ratio of maximum to minimum amplitude is
(Exam: JEE Advanced)
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Frequently Asked Questions

A wave is a disturbance that propagates through a medium or space and transfers energy without causing any permanent displacement of matter.

Wave motion is the propagation of oscillations from one point to another in a medium due to restoring forces and inertia of particles.

No, wave motion involves transfer of energy only; particles oscillate about their mean positions.

Mechanical waves are waves that require a material medium for propagation, such as sound waves and water waves.

Non-mechanical waves do not require a material medium and can propagate through vacuum, for example electromagnetic waves.

Transverse waves are waves in which particles of the medium oscillate perpendicular to the direction of wave propagation.

Waves on a stretched string, ripples on the surface of water, and electromagnetic waves are examples.

Longitudinal waves are waves in which particles of the medium oscillate parallel to the direction of wave propagation.

Sound waves in air and compression waves in solids are examples of longitudinal waves.

Wavelength is the distance between two successive points in the same phase of vibration, such as consecutive crests or compressions.

The SI unit of wavelength is metre (m).

Frequency is the number of complete oscillations made by a particle of the medium per second.

The SI unit of frequency is hertz (Hz).

Time period is the time taken by a particle of the medium to complete one full oscillation.

Frequency is the reciprocal of time period, given by \( f = \frac{1}{T} \).

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