Sound Wave MCQ. We covered all the Sound Wave MCQ in this post for free so that you can practice well for the exam.
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MCQ on Sound Waves for Students
When the vibrating object moves backward, it creates a region of low pressure called
(a) rarefaction
(b) compression
(c) depression
(d) hypertension
Option a – rarefaction
Does a sound wave travel from east to west in which direction do the particles of air move?
(a) East-west
(b) North-south
(c) Up and down
(d) None of these
Option a – East-west
The unit of quantity on which the loudness of sound depends is
(a) meter
(b) Hz
(c) meter/second
(d) second
Option b – Hz
If you are at an open-air concert and someone’s head gets between you and the orchestra, you can still hear the orchestra because
(a) sound waves pass easily through a head
(b) a head is not very large compared with the wavelength of the sound
(c) the sound is reflected from the head
(d) the wavelength of the sound is much smaller than the head
Option b – a head is not very large compared with the wavelength of the sound
An underwater explosion is caused near the seashore. There are two observers, X under water and Y on land, each at a distance of 1 km from the point of explosion
(a) X will hear the sound earlier
(b) Y will hear the sound earlier
(c) Both will hear the sound at the same time.
(d) Y will not hear the sound at all
Option a – X will hear the sound earlier
In a long spring which of the following type of waves can be generated
(a) longitudinal only
(b) transverse only
(c) both longitudinal and transverse
(d) electromagnetic only
Option c – both longitudinal and transverse
When a vibrating object moves forward, it pushes and compresses the air in front of it creating a region of high pressure called
(a) rarefaction
(b) compression
(c) depression
(d) hypertension
Option b – compression
Which of the following statements is wrong?
(a) Sound travels in a straight line
(b) Sound is a form of energy
(c) Sound travels in the form of waves
(d) Sound travels faster in a vacuum than in air
Option d – Sound travels faster in a vacuum than in air
The voice of a friend is recognized by its
(a) pitch
(b) quality
(c) intensity
(d) velocity
Option b – quality
Compression is a region of
(a) low pressure
(b) normal pressure
(c) high pressure
(d) no pressure
Option c – high pressure
During summer, an echo is heard :
(a) sooner than during winter
(b) later than during winter
(c) after the same time as in winter
(d) None of these
Option a – sooner than during winter
Echo is a type of
(a) reflected sound
(b) refracted sound
(c) polarised sound
(d) None of these
Option a – reflected sound
Sound is a
(a) mechanical wave
(b) electromagnetic wave
(c) longitudinal wave
(d) Both (a) and (c)
Option d – Both (a) and (c)
Sitar is a
(a) wind instrument
(b) stringed instrument
(c) percussion instrument
(d) reed instrument
Option b – stringed instrument
(a) the Number of particles in the medium in a given volume
(b) the Density of particles in the medium
(c) the Position of the particles
(d) Both (a) and (b)
Option d – Both (a) and (b)
Ultrasonic waves have a frequency
(a) below 20 Hz
(b) between 20 and 20,000 Hz
(c) only above 20,000 Hz
(d) only above 20,000 MHz
Option c – only above 20,000 Hz
One hertz is equivalent to
(a) one cycle per second
(b) one second
(c) one meter per second
(d) one-second per meter
Option a – one cycle per second
A particle of the medium in contact with the vibrating object is first displaced from its equilibrium position. It exerts a force on the adjacent particle and displaces it from rest. After displacing the adjacent particle the first particle
(a) Comes back to its original position
(b) Goes and displaces the other particle
(c) Travels till the end of the medium
(d) None of these
Option a – Comes back to its original position
Which of the following is carried by the waves from one place to another?
(a) Mass
(b) Velocity
(c) Wavelength
(d) Energy
Option d – Energy
The velocity of sound is largest in
(a) water
(b) air
(c) metal
(d) vacuum
Option c – metal
The ratio of the speed of a body to the speed of sound is called
(a) Sonic index
(b) Doppler ratio
(c) Mach number
(d) Refractive index
Option c – Mach number
Sound is transmitted through a medium. The medium can be
(a) Solid
(b) Liquid
(c) Gas
(d) Solid, liquid, or gas
Option d – Solid, liquid, or gas
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