Q. 1
What happens to the loudness of a sound as it moves away from its source?
A
Becomes constantB
Remains the sameC
IncreasesD
DecreasesClick an option to check your answer
Q. 2
Which type of wave is a sound wave?
A
Electromagnetic waveB
Standing waveC
Longitudinal waveD
Transverse waveClick an option to check your answer
Q. 3
How can ultrasounds detect flaws in metal?
A
By bending around cornersB
By producing soundC
By reflecting off defectsD
By passing through without reflectionClick an option to check your answer
Q. 4
Which wave property determines loudness?
A
PitchB
FrequencyC
AmplitudeD
All of theseClick an option to check your answer
Q. 5
The crest and trough are parts of ____ wave.
A
Longitudinal waveB
Transverse waveC
both Longitudinal wave and Transverse waveD
None of theseClick an option to check your answer
Q. 6
What is the audible range of sound for humans?
A
20 Hz to 20,000 HzB
25 Hz to 25,000 HzC
15 Hz to 18,000 HzD
10 Hz to 15,000 HzClick an option to check your answer
Q. 7
What medical technique uses ultrasound to form images of the heart?
A
X-rayB
EchocardiographyC
CT scanD
MRIClick an option to check your answer
Q. 8
Which animal is known to produce ultrasonic sounds to evade predators?
A
RhinocerosesB
DolphinsC
BatsD
ElephantsClick an option to check your answer
Q. 9
What distinguishes a tone from a note?
A
AmplitudeB
DurationC
Quality of soundD
FrequencyClick an option to check your answer
Q. 10
Children can hear sound of frequency up to:
A
25,000HzB
30,000HzC
20HzD
20,000HzClick an option to check your answer
Q. 11
What is a wavelength?
A
Time period of the waveB
Amplitude of the waveC
Distance between compressionsD
Frequency of the soundClick an option to check your answer
Q. 12
How does the sensitivity of hearing change with age?
A
Increases for all frequenciesB
Decreases for lower frequenciesC
Decreases for higher frequenciesD
Remains constantClick an option to check your answer
Q. 13
Principle of reflection of sound is used in:
A
StethoscopeB
MegaphoneC
Sound boardsD
All of theseClick an option to check your answer
Q. 14
How do sound waves travel through a medium?
A
By light transmissionB
By particle movementC
Through electromagnetic wavesD
By compression onlyClick an option to check your answer
Q. 15
Sound is produced when
A
An object fallsB
An object vibratesC
An object is stationaryD
An object is on groundClick an option to check your answer
Q. 16
A bat hears the echo of its squeak after 0.1 seconds. How far is the obstacle? Speed of sound is 344 m/s.
A
170mB
17.2mC
18mD
180mClick an option to check your answer
Q. 17
What type of wave is created when you drop a pebble into a pond?
A
Transverse waveB
Sound waveC
Shock waveD
Longitudinal waveClick an option to check your answer
Q. 18
What is an echo?
A
A reflected soundB
A sound that fades awayC
A type of noiseD
A continuous soundClick an option to check your answer
Q. 19
How does sound propagation occur in air?
A
By light reflectionB
By electromagnetic wavesC
By density variationsD
By particle movement onlyClick an option to check your answer
Q. 20
The method of detecting the presence, position and direction of motion of distant objects by reflecting a beam of sound waves is known as _____.
A
SONARB
MIRC
CROD
RADARClick an option to check your answer
Q. 21
What is the relationship between frequency and time period?
A
They are equalB
No relationshipC
They are inversely relatedD
They are directly relatedClick an option to check your answer
Q. 22
Choose the correctly matched pair:
A
Compression - Region of high pressureB
Sound waves - Transverse wavesC
Rarefaction - Region of high pressureD
Medium for sound - VacuumClick an option to check your answer
Q. 23
How can reverberation be reduced in an auditorium?
A
By using concrete wallsB
By using sound-absorbent materialsC
By increasing audience sizeD
By painting wallsClick an option to check your answer
Q. 24
How far must a reflecting surface be to hear a distinct echo if sound travels at 344 m/s?
A
34.4 mB
20 mC
10 mD
17.2 mClick an option to check your answer
Q. 25
What is the intensity of sound?
A
Amplitude of the waveB
Pitch of the soundC
Energy passing through areaD
Frequency of the soundClick an option to check your answer
Q. 26
Which animals are known to use infrasound for communication?
A
Elephants and whalesB
Birds and batsC
Mice and rabbitsD
Cats and dogsClick an option to check your answer
Q. 27
You cannot talk to each other on the moon because
A
you would not feel like talkingB
gravity is 1/6th that on the earthC
compressions and rarefactions can only travel on earth’s surfaceD
atmosphere is not presentClick an option to check your answer
Q. 28
A wave moves a distance of 10m in 0.05 seconds. Find the wavelength if frequency is 200Hz.
A
0.8mB
1mC
0./mD
0.5mClick an option to check your answer
Q. 29
An echo is heard when:
A
Minimum time gap is 1/10 secB
Minimum distance is 18mC
Minimum distance is 17mD
Minimum time gap is 1/100 secClick an option to check your answer
Q. 30
What is infrasonic sound?
A
Sound of any frequencyB
Sound below 20 HzC
Sound between 20 Hz and 20 kHzD
Sound above 20 kHzClick an option to check your answer
Q. 31
The upper frequency limit of the audible range of human hearing is about
A
2 kHzB
2,000,000 HzC
2000 HzD
20 kHzClick an option to check your answer
Q. 32
How does the rolling of thunder occur?
A
Single reflectionB
Continuous echoesC
High-frequency soundD
Low-frequency soundClick an option to check your answer
Q. 33
What is the main cause of sound production?
A
Air pressureB
Light wavesC
Vibration of objectsD
Temperature changesClick an option to check your answer
Q. 34
Sound waves in air are
A
polarisedB
transverseC
longitudinalD
electromagneticClick an option to check your answer
Q. 35
Which of the following is a mechanical wave?
A
Radio wavesB
SoundC
X-raysD
LightClick an option to check your answer
Q. 36
What is a characteristic of mechanical waves?
A
They require a mediumB
They have no frequencyC
They travel through vacuumD
They are light wavesClick an option to check your answer
Q. 37
Absorbent materials are to be used while making interior design in an auditorium as
A
To prevent reverberationB
it has to look goodC
sound travels with a lesser velocityD
echo is to be increasedClick an option to check your answer
Q. 38
What is the SI unit of frequency?
A
Hertz (Hz)B
Newton (N)C
Metre (m)D
Second (s)Click an option to check your answer
Q. 39
What does the frequency of a sound wave indicate?
A
The speed of soundB
The distance between wavesC
The amplitude of the waveD
The pitch of the soundClick an option to check your answer
Q. 40
Infrasonic waves have frequencies
A
above 20,000 HzB
below 20 HzC
no upper or lower limit of frequenciesD
between 20 Hz and 20,000 HzClick an option to check your answer
Q. 41
Sound cannot travel through
A
waterB
spaceC
airD
ironClick an option to check your answer
Q. 42
How is rarefaction defined in sound waves?
A
High pressure regionB
Low pressure regionC
High density regionD
Static regionClick an option to check your answer
Q. 43
What device uses multiple reflections to amplify sound?
A
HeadphonesB
StethoscopeC
LoudspeakerD
MicrophoneClick an option to check your answer
Q. 44
Sound is produced by _________objects.
A
vibratingB
stationaryC
fast movingD
rotatingClick an option to check your answer
Q. 45
In longitudinal waves, how does the particle of medium vibrate compared to the direction of propagation of wave?
A
PerpendicularB
ParallelC
At 45°D
At 60°Click an option to check your answer
Q. 46
The eardrum is a:
A
FluidB
BoneC
A stretched membraneD
Coiled tubeClick an option to check your answer
Q. 47
A source produces 20 crests and 20 troughs in 0.2 seconds. Find the frequency.
A
1HzB
200HzC
100HzD
150HzClick an option to check your answer
Q. 48
What is a medium in the context of sound?
A
Substance for sound travelB
A waveC
A vibrating objectD
A sound waveClick an option to check your answer
Q. 49
What is the speed of sound in air at 22°C?
A
344 m/sB
331 m/sC
300 m/sD
350 m/sClick an option to check your answer
Q. 50
What is necessary for sound to be reflected?
A
A solid or liquid surfaceB
A vacuumC
High temperatureD
A liquid mediumClick an option to check your answer
Q. 51
The motion of the particles of a medium when a sound wave is passing through it is:
A
translatoryB
rotatoryC
oscillatoryD
randomClick an option to check your answer
Q. 52
What happens to the particles of the medium as sound travels?
A
They oscillate around fixed positionsB
They break downC
They disappearD
They move long distancesClick an option to check your answer
Q. 53
Sound wave is a ____ wave.
A
transverse waveB
longitudinal waveC
both a and bD
None of theseClick an option to check your answer
Q. 54
Sound waves are characterized by the motion of particles in the medium and are called __________ waves.
A
TransverseB
MechanicalC
ElectromagneticD
LongitudinalClick an option to check your answer
Q. 55
How does the speed of sound change with temperature?
A
Decreases with increaseB
Changes randomlyC
Remains constantD
Increases with increaseClick an option to check your answer
Q. 56
How does loudness relate to amplitude?
A
Inversely proportionalB
IndependentC
Directly proportionalD
No relationClick an option to check your answer
Q. 57
How is the amplitude of a sound wave defined?
A
Time period of the waveB
Maximum disturbance from meanC
Speed of the waveD
Frequency of the waveClick an option to check your answer
Q. 58
What is a primary use of an ultrasound scanner?
A
To measure blood pressureB
To image internal organsC
To detect external injuriesD
To assess bone densityClick an option to check your answer
Q. 59
The speed of sound is defined as the distance which a point on a wave, such as a compression or a rarefaction, travels per unit _____.
A
TimeB
AmplitudeC
FrequencyD
IntensityClick an option to check your answer
Q. 60
Which of the following will not allow sound propagation?
A
SteelB
VacuumC
WaterD
AirClick an option to check your answer
Q. 61
Which characteristic of sound is associated with the speed of vibration?
A
AmplitudeB
QualityC
FrequencyD
PitchClick an option to check your answer
Q. 62
Which of the following quantities is transferred during wave propagation?
A
EnergyB
ParticlesC
SpeedD
MassClick an option to check your answer
Q. 63
The maximum displacement of the particle from its mean position is called the:
A
AmplitudeB
WavelengthC
Wave numberD
None of theseClick an option to check your answer
Q. 64
What property of a sound wave enables us to distinguish one sound from another having the same pitch and loudness?
A
FrequencyB
IntensityC
AmplitudeD
QualityClick an option to check your answer
Q. 65
What are compressions in sound waves?
A
Regions of still airB
Regions of low pressureC
Static regionsD
Regions of high pressureClick an option to check your answer
Q. 66
Cochlea, semicircular canals, and auditory nerve are associated with:
A
Middle earB
Inner earC
External earD
None of theseClick an option to check your answer
Q. 67
The upper limit of frequency of sound waves audible to human beings is:
A
20,000HzB
5HzC
20HzD
35,000HzClick an option to check your answer
Q. 68
Frequency of infrasonic waves is ____________ than the frequency of ultrasound waves.
A
lessB
moreC
almost the sameD
none of theseClick an option to check your answer
Q. 69
What is reverberation?
A
A loud soundB
Echo of soundC
Persistence of soundD
Sound absorptionClick an option to check your answer
Q. 70
The distance between a consecutive crest and trough is:
A
4xB
2xC
x/2D
xClick an option to check your answer
Q. 71
Which of the following instruments directs sound in a particular direction?
A
ViolinB
PianoC
FluteD
MegaphoneClick an option to check your answer
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