ICSE Worksheet for chapter-9 Sound class 10

ICSE Worksheet for chapter-9 Sound class 10

Worksheet For class 10

This page is prepared by the Academic team of Physics Wallah which consists of ICSE Board Worksheet for Class 10 Physics . Students of Class 10 Physics can get a free Worksheet for Class 10 Physics in PDF format prepared as per the newest syllabus and examination pattern in your schools.

Standard 10 students can practice questions and answers which are given here for Physics in Grade 10 that will help them to improve their knowledge of all important chapters and their topics. Students can also download free pdf of Class 10 Physics Notes prepared by teachers and solve important problems provided here with solutions on daily basis to get more scores in school exams and tests.

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Summary

• Wave Motion – Introduction, Definition, Classification Of Waves
• Sound Waves - Production; Speed of Sound in Different Medium; Reflection Of Sound
• Audible, Ultrasonic And Infrasonic Waves
• Echo and Reverberation
• Relation Between Speed Of Sound Time Of Hearing Echo And Distance Of Reflecting Body

Section 1 - Objective

Q1. In which medium sound does travels faster:

1. Solid
2. Liquid
3. Gas
4. None of these

Q2. Nature of sound wave is:

1. Transverse
2. Longitudinal
3. Electromagnetic
4. NOT

Q3. Sound waves in air are

1. Longitudinal waves
2. Radio waves
3. Transverse waves
4. Electromagnetic waves

Q4. The density of medium through which longitudinal waves propagates is minimum in a region which is called:

1. Crest
2. Compression
3. Trough
4. Rarefaction

Q5. Mechanical waves can travel:

1. In vacuum as well as in a medium
2. In vacuum but not in a medium
3. In a medium but not in vacuum
4. Neither in a medium nor in vacuum

Q6. The minimum distance between the source of sound and the obstacle for an echo to take place is (speed of sound us 340m/s)

1. 17m
2. 172m
3. 17cm
4. 34.4m

Q7. During summer, an echo is heard:

1. Sooner than during winter
2. Later than during winter
3. After same time as in winter
4. Rarely

Q8. The velocity of sound in air at 30°C is approximately:

1. 332ms ^-1
2. 350ms ^-1
3. 530ms ^-1
4. 32kms ^-1

Q9. Infrasonic frequency range is

1. Below 20Hz
2. 20Hz to 20 kHz
3. Above 20 kHz
4. No limit

Q10. Sound waves of wavelength λ travel from a medium in which their speed is V into a medium in which their speed is 4V. The wavelength of the sound in the second medium is:

1. λ
2. 2λ
3. 3λ
4. 4λ

Q11. A sonar echo takes 4.4s to return from a submarine. If the speed of sound in water is 1500m/s then the distance of submarine from the sonar is:

1. 1500m
2. 3000m
3. 3300m
4. 3600m

Q12. Ultrasonic waves are used in :

1. SONAR
2. Emulsifications
3. Sonography
4. All of these

Section 2 - Subjective

• 1. Distinguish between Transverse wave and Longitudinal wave.
• 2. Define Echo and State its uses.
• 3. State the working principle of SONAR.
• 4.
  1. A man stands at a distance of 68m from a cliff and fires a gun. After what time interval will he hear the echo, if the speed of sound in air is 340m/s? (I.C.S.E - 2010)
  2. If the man had been standing at a distance of 12m from the cliff would he have heard a clear echo?
• 5. A submarine emits a sonar pulse which returns from the underwater cliff in 1 sec. If the speed of sound in salt water is 1500m/s, how far away is the cliff?
• 6. State the conditions for the formation of echo

Solutions for Section 1 & 2

Objective

Subjective

4. (i) 0.4s

(ii) No

5. 750 m