Sound

_________ is a form of energy which produces sensation of hearing in our ears.
1. Heat
2. Sound
3. Sense
4. None
All sounds are produced by _________ of substances.
1. waves
2. vibrations
3. molecules
4. All above
When you strike the tuning fork on the rubber pad, it starts vibrating. These vibrations cause the nearby molecules to vibrate. Thus, ___________ produce sound.
1. tuning fork
2. striking
3. vibrations
4. All above
Sound needs a medium for ______________.
1. travelling
2. propagation
3. moving
4. us to hear
Sound cannot travel through vacuum. This can be demonstrated by the _________ experiment.
1. vaccum
2. Bell – Jar
3. Bell – glass
4. Electric glass
All the particles of the medium restrict themselves with only a small to and fro motion called ___________
1. vibration
2. movement
3. propogation
4. all
Vibrations enables the disturbance to be carried forward. This disturbance which is carried forward in a medium is called __________-.
1. Sound
2. Wave
3. heat
4. molecules
______________ are regions where particles are crowded together.
1. Rarefactions
2. sound waves
3. Compressions
4. None
________________ are the regions of low pressure where particles are spread apart.
1. Rarefactions
2. Compressions
3. Waves
4. None
What does the picture below represent?
1. longitudinal nature of sound wave in the vaccum
2. latitudnal nature of sound wave in the medium
3. longitudinal nature of sound wave in the medium
4. latitudnal nature of sound wave in the vaccum
The maximum displacement of the particles of the medium from their original undisturbed positions, when a wave passes through the medium is called _________ of the wave.
1. Amplitude
2. Velocity
3. Frequency
4. Wave length
Amplitude is denoted as __ and its SI units are __
1. A , m
2. Amp, km
3. A , km
4. Amp , m
The number of vibrations (complete waves or cycles) produced in one second is called
1. Amplitude
2. Velocity
3. Frequency
4. Wave length
Frequency is denoted as __ and its SI units are __.
1. n , 1/s
2. n , Hz
3. f , 1/s
4. both a and b
The time required to produce one complete vibration (wave or cycle) is called ______________ of the wave.
1. Velocity
2. Sound
3. Characteristic
4. time period
Time period is denoted as __ , and its SI unit is ___
1. T , s
2. T , m
3. Tp , s
4. Tp , m
The minimum distance in which a sound wave repeats itself is called its ____________.
1. Frequency
2. Wave length
3. Speed
4. Velocity
In a sound wave, the distance between the centers of two consecutive compressions or two consecutive rarefactions is called ________.
1. frequency
2. wavelength
3. amplitude
4. velocity
Wave length is denoted by __ and its SI unit is__
1. λ , m
2. λ , km
3. w , m
4. w , km
The distance travelled by the sound wave in one second is called _______ of the sound.
1. velocity
2. speed
3. wavelength
4. both a and b
Velocity is denoted by __ and its SI unit is __
1. v , m/s
2. v , m
3. s , m/s
4. v , m
Sounds can be distinguished from one another in terms of the following different
factors.
1. Loudness
2. Pitch
3. Timbre
4. Quality
5. All of the above
The loudness of a sound depends on the _____________ of sound wave.
1. pitch
2. intensity
3. quality
4. all of the above
__________ is defined as the amount of energy crossing per unit area
per unit time perpendicular to the direction of propagation of the wave.
1. Intensity
2. Amplitude
3. Pitch
4. None
The intensity of sound heard at a place depends on the following factors.
1. Amplitude of the source
2. Distance of the observer from the source.
3. Surface area of the source.
4. Density of the medium.
5. Frequency of the source.
6. All the above
The unit of intensity of sound is __________.
1. Hertz
2. seconds
3. decibel
4. webel
___________ is one of the characteristics of sound by which we can distinguish whether a sound is shrill or base.
1. Intensity
2. Pitch
3. Amplitude
4. Quality
___________ is the characteristic which distinguishes two sounds of same loudness and pitch emitted by two different instruments.
1. Intensity
2. Timbre
3. Quality
4. both b and c
A sound of single frequency is called a
1. tone
2. tune
3. ton
4. none
collection of tones is called a ____.
1. tune
2. tones
3. note
4. none
Speed of sound =
1. One wavelength (λ) / One time period (T)
2. One amplitude (A) / One time period (T)
3. One wavelength (w) / One time period (T)
4. One frequency (hz) / One time period (T)
The angle in which the sound is incident is _________ to the angle in which it is reflected.
1. less
2. more
3. equal
4. none
Direction of incident sound, the reflected sound and the normal are in the same __________
1. line
2. plane
3. angle
4. none
Musical instruments are all designed to send sound in a particular direction without __________it in all directions.
1. colliding molecules
2. spreading
3. vapourizing
4. none
In musical instruments, , a tube followed by a ____________ opening reflects sound successively to guide most of the sound waves from the source in the forward direction towards the audience.
1. straight
2. conical
3. narrow
4. wider
_____________ is a medical instrument used for listening to sounds produced in the body. In this instrument, these sounds reach doctor’s ears by multiple reflections that happen in the connecting tube.
1. Musical instruments
2. Hearing tube
3. Stethoscope
4. None
When we shout or clap near a suitable reflecting surface such as a tall building or a mountain, we will hear the same sound again a little later. This sound which we hear is called an _________
1. multiplexing
2. echo
3. cave sound
4. all the above
To hear a distinct echo the time interval between the original sound and the reflected sound must be at least ______ s
1. 10
2. 0.1
3. 0.5
4. 1
The roaring of thunder is due to the successive ________ of the sound from a number of reflecting surfaces, such as the clouds at different heights and the land.
1. compressions
2. rarefactions
3. reflections
4. both a and c
A sound created in a big hall will persist by repeated reflection from the walls until it is reduced to a value where it is no longer audible. The repeated reflection that results in this persistence of sound is called ___________
1. relections
2. multiplexing
3. propogation
4. reverberation
Ultrasonic sound is the term used for sound waves with frequencies greater than
1. 200,000 hz
2. 20,000 hz
3. 2,000 hz
4. 200 hz
The ultrasonic waves allow different tissues such as organs and bones to be ‘seen’ or distinguished by _____________ of ultrasonic waves by the objects examined.
1. bouncing
2. reflecting
3. absorbing
4. none
An ____________ is an image obtained by the use of reflected ultrasonic waves.
1. x-ray
2. echoray
3. echogram
4. none
SONAR stands for __________________________.
1. SOlar Navigation And Ranging
2. SOund Navigation And Recording
3. SOlar Navigation And Recording
4. SOund Navigation And Ranging
Sonar consists of a ____________ and a ___________ and is installed at the bottom of boats and ships.
1. transmitter , ultra sound analyzer
2. transmitter , detector
3. ultra sound analyzer , detector
4. None
The _______________ is one of the simplest and oldest cardiac investigations available.
1. electrocardiogram
2. ultra sound cardiogram
3. Sonar cardiogram
4. All above
The outer ear of human is called _______
1. penna
2. pinna
3. eardrum
4. both b and c
speed of sound through sea water is
1. 2d t = v
2. 4d t = v
3. 2d /t = v
4. 4d /t = v
the eardrum moves inward when a ___________ reaches it and moves outward when a __________ reaches it
1. rarefaction , compression
2. sound , rarefaction
3. compression , rarefaction
4. sound, compression
The vibrations in the ear are amplified several times by
1. hammer
2. anvil
3. stirrup
4. All the above
In the inner ear, the pressure variations are turned into electrical signals by the ___________.
1. pinna
2. eardrum
3. cochlea
4. outer ear

Sound

Quiz