Sound Chapter Board Questions Class10 ICSE
Here we provide Class 10 Maths important notes,board questions and predicted questions with Answers for chapter Sound These important notes,board questions and predicted questions are based on ICSE board curriculum and correspond to the most recent Class 10 Maths syllabus. By practising these Class 10 materials, students will be able to quickly review all of the ideas covered in the chapter and prepare for the Class 10 Board examinations.
2020
Q1
(i) Name the system which enables us to locate underwater objects by
transmitting ultrasonic waves and detecting the reflecting impulse.
(ii) What are acoustically measurable quantities related to pitch and loudness?
solutions
(ii) What are acoustically measurable quantities related to pitch and loudness?
solutions
Q2
A sound wave travelling in water has wavelength 0.4 m.
Is this wave audible in air? (The speed of sound in water = 1400 ms-2)
solutions
solutions
Q3
(i) When a tuning fork [vibrating] is held close to ear, one hears a faint hum.
The same [vibrating tuning fork] is held such that its stem is in contact with
the table surface, then one hears a loud sound. Explain.
(ii) A man standing in front of a vertical cliff fires a gun. He hears the echo after 3.5 seconds. On moving closer to the cliff by 84 m, he hears the echo after 3 seconds. Calculate the distance of the cliff from the initial position Of the man.
solutions
(ii) A man standing in front of a vertical cliff fires a gun. He hears the echo after 3.5 seconds. On moving closer to the cliff by 84 m, he hears the echo after 3 seconds. Calculate the distance of the cliff from the initial position Of the man.
solutions
2019
Q1
A man playing a flute is able to produce notes Of different frequencies. If he
closes the holes near his mouth, will the pitch ofthe note produced, increase or
decrease? Give a reason.
solutions
solutions
Q2
It is observed that during march-past we hear a base chum distinctly from a
distance compared to the side drums.
(i) Name the characteristic of sound associated with the above observation.
(ii) Give a reason for the above observation.
solutions
(i) Name the characteristic of sound associated with the above observation.
(ii) Give a reason for the above observation.
solutions
Q3
A pendulum has a frequency of 4 vibrations per second. An observer starts the
pendulum and fires a gun simultaneously. He hears the echo from the cliff after
6 vibrations of the pendulum. Ifthe velocity of sound in air is 340 m/s, find the
distance between the cliff and the observer.
solutions
solutions
Q4
Two pendulums C and D are suspended from a wire as shown in the figure
given below. Pendulum C is made to oscillate by displacing it from its mean
position. It is seen that D also starts oscillating.
(i) Name the type of oscillation, C will execute.
(ii) Name the type of oscillation, D will execute.
(iii) If the length ofD is made equal to C then what difference will you notice in the oscillations of D?
(iv) What is the name of the phenomenon when the length of D is made equal
solutions
(i) Name the type of oscillation, C will execute.
(ii) Name the type of oscillation, D will execute.
(iii) If the length ofD is made equal to C then what difference will you notice in the oscillations of D?
(iv) What is the name of the phenomenon when the length of D is made equal
solutions
2018
Q1
(i) Why is the ratio Ofthe velocities oflight ofwavelengths 4000Å and
in vacuum 1:1?
(ii) Which of the above wavelengths has a higher frequency?
solutions
(ii) Which of the above wavelengths has a higher frequency?
solutions
Q2
(i) Define scattering.
(ii) The smoke from a fire looks white. Which of the following statements is true?
(1) Molecules of the smoke are bigger than the wavelength of light.
(2) Molecules of the smoke are smaller than the wavelength of light.
solutions
(ii) The smoke from a fire looks white. Which of the following statements is true?
(1) Molecules of the smoke are bigger than the wavelength of light.
(2) Molecules of the smoke are smaller than the wavelength of light.
solutions
Q3
(a)
Displacement distance graph of two sound waves A and B, travelling in a
medium,are as shown in the diagram below.
Study the two sound waves and compare their
(i) Amplitudes
(ii) Wavelengths
solutions
Study the two sound waves and compare their
(i) Amplitudes
(ii) Wavelengths
solutions
Q4
(i) What do you understand by free vibrations of a body?
(ii) Why does the amplitude of a vibrating body continuously decrease during damped vibrations?
solutions
(ii) Why does the amplitude of a vibrating body continuously decrease during damped vibrations?
solutions
Q5
The diagram above shows a wire stretched over a sonometer_ Stems of two vibrating tuning forks A and B are touched to the wooden box ofthe sonometer_ It is obseroed that the paper rider (a small piece of paper folded at the centre) present on the wire flies off when the stem of vibrating tuning fork B is touched to the "00den box but the paper just vibrates when the stem ofvibrating tuning fork A is touched to the wooden box.
(i) Name the phenomenon when the paper rider just vibrates.
(ii) Name the phenomenon when the paper rider flies off.
(iii) Why does the paper rider fly off ivhen the stem of tuning fork B is touched to the box?
solutions
The diagram above shows a wire stretched over a sonometer_ Stems of two vibrating tuning forks A and B are touched to the wooden box ofthe sonometer_ It is obseroed that the paper rider (a small piece of paper folded at the centre) present on the wire flies off when the stem of vibrating tuning fork B is touched to the "00den box but the paper just vibrates when the stem ofvibrating tuning fork A is touched to the wooden box.
(i) Name the phenomenon when the paper rider just vibrates.
(ii) Name the phenomenon when the paper rider flies off.
(iii) Why does the paper rider fly off ivhen the stem of tuning fork B is touched to the box?
solutions
Q6
A person is standing at the sea shore. An observer on the ship which is anchored
in between a vertical cliff and the person on the shore: fires a gun. The person
on the shore hears two sounds, 2 seconds and 3 seconds after seeing the smoke
ofthe fired gum If the speed of sound in the air is 320 ms-1 then calculate:
(i) the distance between the observer on the ship and the person on the shore.
(ii) the distance between the cliff and the observer on the ship.
solutions
(i) the distance between the observer on the ship and the person on the shore.
(ii) the distance between the cliff and the observer on the ship.
solutions
2017
Q1
The human ear can detect continuous sounds in the frequency range from 20 Hz
to 20,000 Hz.Assuming that the speed of sound in air is 330 ms-1 for all
frequencies, calculate the wavelengths corresponding to the given extreme
frequencies of the audible range.
solutions
solutions
Q2
An enemy plane is at a distance of 300 km from a radar. In how much time the
radar will be able to detect the plane? Take velocity of radiowaves as 3 x
10-1ms-1
solutions
solutions
Q3
How is the frequency of a stretched string related to:
(i) its length ?
(ii) its tension?
solutions
(i) its length ?
(ii) its tension?
solutions
Q4
Name the factor that determines
(i) Loudness of the sound heard.
(ii) Quality of the note.
(iii) Pitch of the note.
solutions
(i) Loudness of the sound heard.
(ii) Quality of the note.
(iii) Pitch of the note.
solutions
Q5
(i) What are damped vibrations?
(ii) Give one example of damped vibrations.
(iii)Name the phenomenon that causes a loud sound ivhen the stem of a vibrating tuning fork is kept pressed on the surface of a table.
solutions
(ii) Give one example of damped vibrations.
(iii)Name the phenomenon that causes a loud sound ivhen the stem of a vibrating tuning fork is kept pressed on the surface of a table.
solutions
Q6
(i) A wire of length 80 cm has a frequency of 256 Hz Calculate the length of
a similar wire under similar tension, which will have frequency 1024 Hz.
(ii) A certain sound has a frequency of 256 hertz and a wavelength of 1.3 m.
1.Calculate the speed with which this sound travels.
2.What difference would be felt by a listener between the above sound and another sound travelling at the same speed, but of wavelength 2.6m?
solutions
(ii) A certain sound has a frequency of 256 hertz and a wavelength of 1.3 m.
1.Calculate the speed with which this sound travels.
2.What difference would be felt by a listener between the above sound and another sound travelling at the same speed, but of wavelength 2.6m?
solutions
2016
Q1
The ratio of amplitude oftwo waves is 3 : 4. What is the ratio of their:
(i) loudness?
(ii) frequencies?
solutions
(i) loudness?
(ii) frequencies?
solutions
Q2
State ways by which the frequency of transverse vibrations of a stretched string can
be increased.
solutions
solutions
Q3
What is meant by noise pollution? Name one source of sound causing noise pollution
solutions
solutions
Q4
(i) Name the waves used for echo depth sounding.
(ii) Give one reason for their use for the above purpose.
(iii) Why are the waves mentioned by you not audible to us?
solutions
(ii) Give one reason for their use for the above purpose.
(iii) Why are the waves mentioned by you not audible to us?
solutions
Q5
(i) What is an echo?
(ii) State two conditions for an echo to take place.
solutions
(ii) State two conditions for an echo to take place.
solutions
Q6
(i) Name the phenomenon involved in tuning a radio set to a particular station.
(ii) Define the phenomenon named by you in part (i) above.
(iii) What do you understand by loudness of sound?
(iv) In which units is the loudness of sound measured?
solutions
(ii) Define the phenomenon named by you in part (i) above.
(iii) What do you understand by loudness of sound?
(iv) In which units is the loudness of sound measured?
solutions
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