Class 10 Exam > Class 10 Notes > Physics Class 10 ICSE > Worksheet: Sound
Worksheet: Sound | Physics Class 10 ICSE PDF Download
Part A — Multiple Choice Questions
Q1. Which type of sound wave has frequency higher than 20,000 hertz?
(a) Infrasonic waves
(b) Ultrasonic waves
(c) Audible waves
(d) Transverse waves
Q2. Sound cannot travel through:
(a) Air
(b) Water
(c) Vacuum
(d) Steel
Q3. Which one is the correct relation between wave velocity (V), frequency (f), and wavelength (λ)?
(a) V = f + λ
(b) V = f ÷ λ
(c) V = f × λ
(d) V = λ ÷ f
Q4. The repetition of sound due to reflection from a surface is called:
(a) Refraction
(b) Echo
(c) Resonance
(d) Diffraction
Q5. Loudness of sound mainly depends on:
(a) Frequency of sound
(b) Amplitude of vibration
(c) Wavelength of sound
(d) Speed of sound
Part B — Short Answer Questions
Q6. What is the difference between infrasonic, audible and ultrasonic sounds?
Q7. What are longitudinal waves? Give one example in daily life.
Q8. State the condition required to hear a distinct echo.
Q9. What is resonance? Give one example.
Q10. How can dolphins or fishermen use ultrasonic sound?
Part C — Long Answer Questions
Q11. A boy shouts near a tall wall and hears the echo after 0.5 seconds. If the speed of sound in air is 340 metres per second, find the distance of the wall from the boy.
Q12. Explain the differences between free vibrations, damped vibrations and forced vibrations with one example of each.
Q13. A simple pendulum swings back and forth producing sound. Explain how energy changes during its motion.
The document Worksheet: Sound | Physics Class 10 ICSE is a part of the Class 10 Course Physics Class 10 ICSE.
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FAQs on Worksheet: Sound - Physics Class 10 ICSE
| 1. What is sound and how is it produced? |  |
Ans.Sound is a form of energy that travels through a medium (such as air, water, or solids) in the form of waves. It is produced by vibrating objects, which create pressure changes in the surrounding medium. These vibrations result in sound waves that propagate to our ears, where they are interpreted as sound.
| 2. What are the characteristics of sound waves? | |
Ans.Sound waves have several key characteristics, including frequency, amplitude, wavelength, and speed. Frequency refers to the number of waves that pass a point in one second and determines the pitch of the sound. Amplitude is the height of the wave and relates to the loudness. Wavelength is the distance between two consecutive points in phase on the wave, and speed is how fast the sound travels through the medium, which can vary based on temperature and the medium itself.
| 3. What is the difference between pitch and loudness? | |
Ans.Pitch and loudness are two distinct characteristics of sound. Pitch refers to how high or low a sound is, which is determined by the frequency of the sound wave; higher frequencies correspond to higher pitches. Loudness, on the other hand, is related to the amplitude of the sound wave; greater amplitude results in a louder sound. Essentially, pitch relates to the frequency, while loudness relates to the amplitude of the sound wave.
| 4. How does sound travel through different mediums? | |
Ans.Sound travels through different mediums at varying speeds due to differences in density and elasticity. In general, sound travels fastest in solids, slower in liquids, and slowest in gases. This is because particles in solids are closely packed together, allowing them to transmit vibrations more efficiently compared to the more spaced-out particles in liquids and gases.
| 5. What is the Doppler effect in relation to sound? | |
Ans.The Doppler effect is the change in frequency or wavelength of a sound wave in relation to an observer moving relative to the source of the sound. When the source of the sound moves toward the observer, the sound waves are compressed, resulting in a higher frequency (or pitch). Conversely, when the source moves away from the observer, the sound waves are stretched, leading to a lower frequency (or pitch). This phenomenon is commonly experienced with passing vehicles or trains.
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