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question_answer1)
When we say that sound travels in a medium, what do we mean?
A)
The particles of the medium travel. done
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B)
The source travels. done
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C)
The disturbance travels. done
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D)
The medium travels. done
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question_answer2)
Which of the following correctly represents the speed of sound in solids, liquids and gases in ascending order?
A)
Gas > liquid > solid done
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B)
Liquid > gas > solid done
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C)
Liquid > solid > gas done
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D)
Gas > liquid > gas done
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question_answer3)
A person can hear an approaching train when he presses his ear to the railway track faster than one who simply stands on the tracks. What makes this possible?
A)
The vibration of railway tracks done
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B)
The vibration of air done
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C)
The speed of sound in solids is more done
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D)
The hearing ability of the man done
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question_answer4)
A person can be identified by his voice. What determines this distinguishing feature?
(i) Amplitude |
(ii) Pitch |
(iii) Loudness |
A)
Only (i) done
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B)
Only (ii) and (iii) done
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C)
Only (i) and (iii) done
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D)
(i), (ii) and (iii) done
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question_answer5)
In human beings, which of the following produces the sound?
A)
Larynx done
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B)
Wind pipe done
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C)
Eardrum done
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D)
Lungs done
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question_answer6)
An object oscillates 50 times in one second. What is its frequency?
A)
0.2 Hz done
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B)
0.02 Hz done
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C)
0.002 Hz done
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D)
50 Hz done
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question_answer7)
In which of the three media does sound travel the fastest?
A)
Air done
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B)
Water done
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C)
Steel done
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D)
Speed is same in any medium done
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question_answer8)
Flash and thunder are produced simultaneously. But thunder is heard a few seconds after the flash is seen. Why?
A)
The speed of sound is greater than the speed of light. done
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B)
The speed of sound is equal to the speed of light. done
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C)
The speed of light is greater than the speed of sound. done
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D)
All of the above done
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question_answer9)
What is the cause for the difference in the voices of men, women and children?
A)
Difference in larynx done
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B)
Difference in lungs done
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C)
Difference in vocal cords done
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D)
Difference in wind pipe done
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question_answer10)
Which of the following represents Hertz?
A)
Second done
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B)
\[\text{Secon}{{\text{d}}^{\text{-1}}}\] done
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C)
Metre done
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D)
\[\text{Metr}{{\text{e}}^{-1}}\] done
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question_answer11)
On what factors does the loudness or intensity of sound depend?
A)
The amplitude of a sound wave done
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B)
The area of a vibrating body done
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C)
Distance from the source of sound done
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D)
All of the above done
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question_answer12)
On what factors does the pitch of sound depend?
A)
Frequency done
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B)
Amplitude done
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C)
Loudness done
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D)
The distance from source done
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question_answer13)
Which of the following produces sound in birds?
A)
Vocal cords done
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B)
Larynx done
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C)
Glottis done
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D)
Syrinx done
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question_answer14)
Find the difference between a musical sound and noise.
A)
Amplitude done
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B)
Loudness done
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C)
Vibrations done
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D)
All of the above done
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question_answer15)
Which of the following are the effects of noise pollution?
(i) Insomnia |
(ii) Hypertension |
(iii) Hearing impairment |
A)
Only (i) and (ii) done
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B)
Only (ii) and (iii) done
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C)
Only (i) and (iii) done
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D)
(i), (ii) and (iii) done
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question_answer16)
Which of the following frequencies cannot be heard by human beings?
A)
1000 Hz done
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B)
10,000 Hz done
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C)
100 Hz done
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D)
1, 00, 000 Hz done
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question_answer17)
Identify the three delicate bones in the middle ear.
A)
Pinna, anvil and cochlea done
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B)
Hammer, anvil and cochlea done
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C)
Pinna, eardrum and anvil done
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D)
Hammer, anvil and stirrup done
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question_answer18)
Identify the nerve that carries the signals from the ear to the brain.
A)
The auditory nerve done
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B)
The optic nerve done
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C)
The motor nerve done
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D)
The spinal cord done
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question_answer19)
Which of the following helps human beings in producing sounds?
A)
The eardrum done
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B)
The auditory nerve done
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C)
The optical cortex done
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D)
The vocal cords done
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question_answer20)
What is the number of vibrations made by a body in one second called?
A)
Frequency done
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B)
Wavelength done
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C)
Loudness done
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D)
Pitch done
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question_answer21)
Which instrument always produces vibrations of the same frequency?
A)
A speaker done
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B)
A bell Jar done
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C)
An electric bell done
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D)
A tuning fork done
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question_answer22)
How is a musical note characterized by?
A)
Loudness done
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B)
Pitch done
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C)
Timbre done
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D)
All of the above done
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question_answer23)
On what factors does the frequency of sound depend in wind instruments?
A)
The length of the air column done
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B)
The breadth of the air column done
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C)
The force with which the wind is blown done
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D)
All of the above done
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question_answer24)
What happens to the pitch, when we tighten the strings of a guitar?
A)
It increases done
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B)
It decreases done
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C)
It remains the same done
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D)
It may increase or decrease done
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question_answer25)
Which of the following correctly describes the pitch and the frequency of the sound of a girl's scream?
A)
Low pitch, low frequency done
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B)
Low pitch, high frequency done
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C)
High pitch, low frequency done
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D)
High pitch, high frequency done
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question_answer26)
When a tuning fork was struck and brought near a bucket of water, a wave as shown in the figure, was formed on its surface.
If the fork is struck harder and brought near the surface, what will increase?
A)
Frequency done
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B)
Wavelength done
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C)
Velocity done
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D)
Amplitude done
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question_answer27)
How does a whistle produce sound?
A)
The body of whistle stores air. done
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B)
The air vibrates. done
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C)
The person produces vibrations. done
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D)
All of the above done
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question_answer28)
Why are sounds of different frequencies produced when the length of the scale protruding out of table is changed and then vibrated?
A)
Due to change in length done
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B)
Due to change in velocity done
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C)
Due to change in amplitude done
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D)
All of the above done
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question_answer29)
If you go on increasing the stretching force on a wire in a guitar, what happens to its frequency?
A)
It increases done
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B)
It decreases done
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C)
It remains unchanged done
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D)
It cannot be said done
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question_answer30)
A bomb explodes on the moon. How long will it take for the sound to reach the earth?
A)
10 seconds done
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B)
1000 seconds done
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C)
1 day done
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D)
Sound will not be heard done
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question_answer31)
Which is true of a body that vibrates with a higher frequency of 2, 00, 000 Hz?
A)
It does not always produce sound. done
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B)
Shrill sounds are produced, which human being can hear. done
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C)
Dolphins can hear the sound. done
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D)
All of the above done
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question_answer32)
Which of the following is expressed in decibels?
A)
Loudness and amplitude of sound done
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B)
Loudness and pitch of sound done
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C)
Amplitude and pitch of sound done
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D)
Frequency of sound done
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question_answer33)
How can the brain interpret the frequency of a sound?
A)
By the loudness of sound done
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B)
By the frequency of sound done
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C)
By the pitch of sound done
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D)
By the amplitude of sound done
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question_answer34)
In a stethoscope, how does the sound of heart beat travel through its tube?
A)
By bending along the tube done
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B)
In a straight line done
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C)
By undergoing multiple reflections done
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D)
As ultrasonic frequency done
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question_answer35)
The frequency of a source is 15 kHz. What will be the frequency of the sound wave produced by it in water and air?
A)
It is the same as that of the source. done
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B)
Frequency in water will be more than that in air. done
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C)
Frequency in air will be more than that in water. done
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D)
Depends upon the velocities of sound in these media. done
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