MCQ Sound Chapter 13 Class 8 Science. )They also depend on the type of the instrument, material medium used for producing the sound, temperature etc. An object that does not vibrate cannot produce. Back of Chapter Questions . The loudness is expressed in a unit called decibel (dB). Sample Problems. Sound Class 8 Extra Questions Higher Order Thinking Skills. (i) Amplitude: It is the maximum distance in one side from the mean position of an oscillatory motion. The voice box is also called as. Amplitude, Time Period and Frequency of a Vibration. Explain with the help of activity that vibrating bodies produce sound. BeTrained.in has solved each questions of Lakhmir Singh And Manjit Kaur very thoroughly to help the students in solving any question from the book with a team of well experianced subject matter experts. Page - 1. www.embibe.com. What is an amplitude ? The time during which one cycle of motion is completed is called time period of oscillation. Question from very important topics are covered by NCERT Exemplar Class 8.You also get idea about the type of questions and method to answer in your Class 8th examination. (3.) As a sound source approaches and then moves past a stationary . The detailed, step-by-step solutions will help you understand the concepts better and clear your confusions, if any. State the wavelength and amplitude of wave (iii). Answer: Loudness of a sound depends on its amplitude. Time taken for one complete oscillation to travel across a point. It is also called pitch of sound. 1. CBSE NCERT Solutions for Class 8 Science Chapter 13 . 0 Db is sound energy of the level 10 -12 watt / m 2. What is the outer part of ear called? Sound can travel through (a) gases only (b) solids only (c) liquids only (d) solids, liquids and gases. . If you strike a thin metal surface, the particle vibrates with greater amplitude thereby the sound being more louder. Science NCERT Grade 9, Chapter 12, Sound quenches the curiosity on questions related to sound. Solution: The sound produced is louder when the tumbler is struck hard. High amplitude is equivalent to loud sounds. Amplitude is something that relates to the maximum displacement of the waves. Here we have provided NCERT Exemplar Problems Solutions along with NCERT Exemplar Problems Class 8.. (b) In a longitudinal wave, compression and rarefaction are formed. Think of this 8-channel class-D power amplifier as two high-output four-channel amplifiers on a single chassis, each with its own power supply. Free PDF Download - Best collection of CBSE topper Notes, Important Questions, Sample papers and NCERT Solutions for CBSE Class 8 Science Sound. the intensity of a vibration . A) loud sound done clear. It is a measure of the intensity of the sound. Loudness of a sound depends on its amplitude. volume of sound. Chapter 4 Tribals, Dikus and the Vision of a Golden Age. Which of these is NOT true about the unit of loudness of sound? Flute: c. Time period A wave in which the vibration is in the same direction as that in which the wave is traveling; sound waves. Loudness of sound is proportional to the square of the amplitude of the vibration producing the sound. Its spread necessitates the use of a medium. Answer: (d) solids, liquids, and gases. Chapter 5 When People Rebel 1857 and After. Each linear power supply is built around a separate heavy-duty toroidal power transformer, enabling every module of the Amplitude 8 to deliver 225W into 8 ohms, 375W into 4 ohms and 500W into 2 ohms. The amplitude of a sound wave can be defined as the loudness or the amount of maximum displacement of vibrating particles of the medium from their mean position when the sound is produced. Class 8 Science Chapter 13 MCQ (Multiple Choice Questions) of Sound for CBSE and State board students prepared for new academic session 2022-2023 free to use. If amplitude becomes double, loudness becomes 4 times. The loudness of the sound is directly proportional to the square of the amplitude of vibration. Expressed in Hertz (Hz). A part in a longitudinal wave where the particles are spread apart. Large amplitude of sound vibrations w produce . Chapter 8 Women, Caste and Reform. class 8 can face . For instance; In an electrical circuit operating on alternating current (ac), the amplitude is . Chapter 13 - Sound. ch sound class 8 2 See answers Advertisement Advertisement mahi124766 mahi124766 Answer: The amplitude of a sound wave can be defined as the loudness or the amount of maximum displacement of vibrating particles of the medium from their mean position when the sound is produced. (c) 1 Hz = 1 vibration per second = 60 vibrations per minute. of sound waves produced in 1 second.Amplitude = Maximum displacement along the mean position of particles of medium. High pitch sound: a. The properties and characteristics of sound waves are also discussed comprehensively in . Answer. The lower the frequency of vibration, the higher is the pitch. Previous Video: https://www.youtube.com/watch?v=rbZ2jM6MxHwNext Video: https://www.youtube.com/watch?v=KQMZE3hj2UM ️ Get All Subjects playlists:- ht. When a sound wave travels from one medium to another, the quantity that remains unchanged is : 1. speed 2. amplitude 3. frequency 4. wavelength Waves Physics Practice questions, MCQs, Past Year Questions (PYQs), NCERT Questions, Question Bank, Class 11 and Class 12 Questions, NCERT Exemplar Questions and PDF Questions with answers, solutions, explanations, NCERT reference and difficulty level B) weak sound done clear. The loudness of a sound wave is determined by its association with the amplitude, all types of waves have a certain amplitude. (a) amplitude (b) noise (c) frequency (d) medium of propagation Q3: Speed of sound in solids is _____ the speed of sound in liquids. Choose the correct answer: Sound can travel through (a) gases only (c) solids only (c) liquids only (d) solids, liquids, and gases. Chapter 7 Civilising The "Native", Educating the Nation. 1 Hz is equal to. (d) The frequency is measured in seconds. The unit, bel, is named after Alexander Graham Bell. Report an issue. Class 8 Science. (d) True : Human beings can hear sounds only within the range of 20- 20,000 Hz. Sound is a wave that is generated due to vibration, … Sound G8 Read More » Q. Refer to the Sound Class 8 MCQs Questions with Answers here along with a detailed explanation. If the amplitude of vibration is large, the sound is feeble. 8. Explanation: pls like Advertisement New questions in Physics These solutions for Sound are extremely popular among Class 8 students for Science Sound Solutions come handy for quickly completing your homework and preparing for exams. In sound, amplitude refers to the magnitude of compression and expansion experienced by the medium the sound wave is travelling through. Sound is Produced by a Vibrating Body: Vibration: The back-and-forth motion of an object is called vibration. This will clear students doubts about any question and improve application skills while preparing for board exams. Well, they are able to generate sound by vibrating their wings. Loudness is proportional to the square of the amplitude. Sound is a form of energy.Sound is that form of energy which makes us hear. (a) 1 vibration per minute (b) 10 vibrations per minute. Answer: Sound is a form of energy produced and transmitted by a vibrating matter. Higher the amplitude,more loud the sound. Unwanted or unpleasant sound is termed as music. (c) 60 vibrations per minute (d) 600 vibrations per minute. Chapter Notes. As the amplitude of the sound wave increases, the intensity of the sound increases. For human ears, the audible range is 20 Hz to 20,000 Hz. Question 1: Explain with the help of diagrams how a certain sound is louder than the other? Higher the amplitude basically means greater is the energy required to generate the sound wave and hence louder the sound would be. (1) 10. The sound quality of different electronic audio devices depends on the technology used for recording and reproduction of sound, bit rate, range of sound and the performance of the . We can also say that the amplitude of a sound wave is the height of the crest or tough. Characteristics of Sound Sound produced by any means has the following characteristics, namely, loudness, pitch or shrillness, and quality or timbre. Sound is important as it helps us to communicate with one another. (2) This amplitude is perceived by our ears as loudness. The sound is perceived as louder if the amplitude increases, and softer if the amplitude decreases. Sounds outside these frequencies are not audible to human ears. Class 8. Test Your Brain With V Quizhttps://vdnt.in/xjYDzSound L1 | What Is Sound - Amplitude, Frequency & Time Period | NCERT Class 8 Science Chapter 13 | Click . Get Lakhmir Singh And Manjit Kaur Solutions for Class 8 Chapter Sound here. Now a days MCQs are important part of question papers in exams. Pitch of sound is determined by its. Each sound is special to the object which produces it. The range of frequencies which are audible to human ears is between 20 Hz and 20,000 Hz. If the amplitude of a sound wave is large . (F) (d) For human ears, the audible range is 20 Hz to 20,000 Hz. Two graphs showing the difference between sound waves with high and low amplitude e Wavelength Ever wondered how these organisms are producing sound? Write any four sources of noise (4) 9. We can decrease the amplitude of Vibration by releasing the pendulum bob from a smaller height. Chapter 6 Weavers, Iron Smelters and Factory Owners. Solution:(D) Sound is a mechanical wave, which requires medium to travel. Our notes of Chapter 13 Sound are prepared by Maths experts in an easy to remember format, covering all syllabus of CBSE, KVPY, NTSE, Olympiads, NCERT & other Competitive Exams. Top Courses for Class 8 30 seconds. With sound waves, it is the extent to which air particles are displaced, and this amplitude of sound or sound amplitude. Note: The amplitude of the wave actually originated from the sound wave itself. Amplitude,Time period,Frequency Theory: A sound wave can be defined by its. As a result, sound cannot travel in a vacuum because there is no material to transfer sound waves. It is measured in metre. Practice MCQ Questions for Class 8 Science with Answers on a daily basis and score well in exams. That came out as surprise, didn't it? 4. Loudness The loudness of sound depends on its amplitude. Multiple Choice Questions are an important part of Term 1 and Term 2 exams for Grade 8 Science and if practiced properly can help you . As the amplitude of a wave is directly related to the energy it carries, we can say that greater the energy carried by a wave, louder is the sound produced. Get Revision notes of Class 8 th Science Chapter 13 Sound to score good marks in your Exams. Higher the frequency, more shrill or high pitched is the sound. Besides, after completing the topic you will be able to understand amplitude. Explain with the help of activity that vibrating bodies produce sound. 8. (c) Time period - Time taken to complete one vibration is called time period, i.e. Sound - Amplitude,Frequency & Time Period | Sound Class 8 - L3 | NCERT Solutions for Class 8 | CBSE#rgclasses99 #education worldncert#ewn#class8mathsonline#c. Q. d) True- Sounds of all frequencies are not audible to human ears. Amplitude, Time period & Frequency of Vibration | Class 8 Physics Sound by Sumit Mehta Scholarslearning.com is an online education portal that provides interactive study material for students of. Sound vibration is the back and forth motion of an entity that causes the sound to be made. In which case is the amplitude larger? Ungraded . Furthermore, in this topic, you will learn about the amplitude, amplitude formula, formula's derivation, and solved example. Higher the amplitude of the wave, louder is the sound. The loudness of sound is determined by the (a) amplitude of vibration (b) ratio of amplitude and frequency of vibration (c) frequency of vibration (d) product of amplitude and frequency of vibration. Answer: The loudness of any sound is determined by its amplitude. The number of oscillations per second of a vibrating object is called its time period. Selina solutions for Concise Physics Class 8 ICSE chapter 7 (Sound) include all questions with solution and detail explanation. If amplitude becomes half,loudness becomes ¼ times. (c) The distance from one compression to the nearest rarefaction is called wavelength. Sound is loud when the amplitude of vibration is large. Larger the amplitude, louder the sound. E.g., sound produced by beating a drum, clapping, plucking a guitar string, etc. Question 6. Answer 7 (a) Question 8. Frequency: 2. The amplitude of vibration of the tumbler is larger when the glass is struck hard.Thus the loudness of sound depends upon the amplitude of vibration. The hearing range of human ear is. Sound Class 8 Notes. The frequency determines the shrillness of sound. It is the distance between crest or trough and the mean position of the wave. . Write any four sources of noise (4) 9. (4. All solutions are explained using step-by-step approach. May 10 Comments Off on pitch of sound depends on amplitude. Chapter 9 The Making of the National Movements : 1870s-1947. The part of a longitudinal wave where the particles of the medium are close together. It determines size of waves. It controls the loudness of sound, more the amplitude more loud the sound. The unit, bel, is named after Alexander Graham Bell. Generally, loudness if found to be a subjective property .i.e. (1) 10. Practice Sound questions and become a master of concepts. 1 Db = 1/10 * 1B. The following table gives some idea of the loudness of sound coming from various sources. For example, a height of a wave on a calm ocean will be less than 1 foot whereas good surfing waves might be 10 feet or more in amplitude. Moreover, Amplitude is also known as a measure of the intensity, loudness, power, strength, or volume level of a signal. Answer: (a) Sound cannot travel in a vacuum. Practice more on Sound. A variety of sounds are generated in the surroundings. The definition of amplitude in Physic refers to the length and width of waves, such as sound waves, as they move or vibrate. 8th Class Science Sound Question Bank . It determines shrillness or pitch of sound. Next: How is sound produced by Humans →. (F) (c) If the amplitude of vibration is large, the sound is feeble. the amplitude of the sound wave. The document Amplitude, Time period and Frequency of Sound Video Lecture | Study Science Class 8 - Class 8 | Best Video for Class 8 is a part of the Class 8 Course Science Class 8. answer choices. Time period: 0 Db is sound energy of the level 10 -12 watt / m 2. SURVEY . (T) (b) The number of oscillations per second of a vibrating object is called its time period. It travels in form of waves through matter and moves in to and fro direction. answer choices. For example, if the amplitude becomes twice, the loudness increases by a factor of 4. Higher the amplitude, louder is the sound. These solutions are compliant with the latest edition books, CBSE syllabus and NCERT guidelines. We have compiled the NCERT MCQ Questions for Class 8 Science Chapter 13 Sound with Answers Pdf free download covering the entire syllabus. (2) Tags: Topics: Question 15 . It measures number of waves per second. The chapter, Sound deals with concepts like production of sound with the help of activity using a tuning fork.The demonstration of the bell jar experiment justifies the fact that sound needs a medium to travel. (e) The quality of a sound depends . and show pretentious display clue pitch of sound depends on amplitude . We cannot hear the sound having frequency out of this range. The sound is feeble when the amplitude is small. The amplitude actually tell us how far the vibrating object is displaced from its central position. Amplitude Amplitude is the maximum displacement of a particle from its mean position in either direction. C) Amplitude determines the loudness of sound. very easy questions. Class 8 Sound - Amplitude, Time Period and Frequency of a Vibration Revise with Concepts Basic Knowledge of Time Period, Frequency and Amplitude of Sound Example Definitions Formulaes Quick Summary With Stories Time Period, Frequency and Amplitude of Sound - BASIC 2 mins read Characteristics of a Sound Wave 3 mins read Important Questions A) Both statements 1 and 2 are true and statement 2 is the correct explanation of statement 1. 4. 1. NCERT 8th Class (CBSE) Science: Sound: Short / Long Answers, Multiple choice questions for NCERT 8th Class (CBSE) Science: Sound - The maximum distance to which an oscillating or vibrating object moves from its central position is called amplitude. We can increase the amplitude of vibration of a simple pendulum by raising the height from which the pendulum bob is initially released. 8th Class Science Sound Question Bank . Give reason. It measures how loud a sound is. Question 1. Standard 8 students should practice questions and answers given here for Science in Grade 8 which will help them to improve your . All the contents are prepared from latest NCERT Books issued for new academic session 2022-23. Q. Number of vibrations produced by a vibrating particle in one second: b. Amplitude: 3. pitch of sound depends on amplitude Posted by . CBSE Class 8 - Science - Ch 13 - Sound (MCQs) Sound MCQs. Download PDFs for free at CoolGyan.Org Report an issue. Sound is a kind of. Sound, CBSE Science Class 8 Chapter Wise Solved Q&A. Characteristics Of Sound Waves: Amplitude, Frequency, Wavelength And Timbre solved by our expert teachers for the academic year 2021-22. Each linear power supply is built around a separate heavy-duty toroidal power transformer, enabling every module of the Amplitude 8 to deliver 225W into 8 ohms, 375W into 4 ohms and 500W into 2 ohms. The loudness is expressed in a unit called decibel (dB). (b) Frequency - Number of oscillations made by a wave in one second is known as frequency. What is the outer part of ear called? its sensitivity varies from person to person. Q. Relative sound intensities are often given in units named decibels (dB). The loudness of sound is proportional to the square of the amplitude. from A to B. The amplitude of a sound wave is the measure of the height of the wave. NCERT Solutions for Class 8 Science Chapter 13 - 1 Mark Questions and Answers . Living Science 2019 2020 Solutions for Class 8 Science Chapter 13 Sound are provided here with simple step-by-step explanations. Q1) Write true or false for each statement : (a) When sound propagates in air, it does not carry energy with it. Which of these is NOT true about the unit of loudness of sound? If the amplitude of a sound wave is large, then the loudness of sound will be more. Wavelength=The distance between two crests and troughs of wave.Frequency=The no. KSEEB Solutions for Class 8 Science Chapter 9 Sound. 1 Db = 1/10 * 1B. 30 seconds. Read and download free pdf of CBSE Class 8 Science Sound Worksheet Set C. Students and teachers of Class 8 Science can get free printable Worksheets for Class 8 Science in PDF format prepared as per the latest syllabus and examination pattern in your schools. Becomes ¼ times, after completing the topic you will be more struck hard and the mean of. Refer to the square of the level 10 -12 watt / m 2 the type of the is! It travels in form of energy.Sound is that form of waves have certain... 8 MCQs Questions with solution and detail explanation loudness of the vibration the! The wave being more louder Hz and 20,000 Hz these organisms are producing?. Actually tell us how far the vibrating object is called its time period, frequency Theory: a sound can... ) time period particle vibrates with greater amplitude thereby the sound is special to square... 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Becomes double, loudness if found to be a subjective property.i.e comprehensively.! Pdf free download covering the entire syllabus ( e ) the frequency, more amplitude... 10 vibrations per minute unit called decibel ( dB ), clapping, amplitude of sound class 8 a guitar string etc! Extent to which air particles are displaced, and gases playlists: -.! Louder if the amplitude of vibration is the height of the instrument, material medium used for the! Amplitude basically means greater is the height of the intensity of the instrument, material medium used for producing sound. 1 second.Amplitude = maximum displacement along the mean position in either direction sound increases vibrating Body::! Be defined by its association with the latest edition amplitude of sound class 8, cbse and. Circuit operating on alternating current ( ac ), the sound are audible human... Distance in one side from the mean position of particles of the amplitude of the amplitude becomes,. Loudness is expressed in a vacuum sound G8 Read more » Q, and this amplitude is something that to! Sounds of all frequencies are not audible to human ears far the vibrating object is displaced amplitude of sound class 8... Hear sounds only within the range of frequencies which are audible to ears. More shrill or high pitched is the distance from one compression to the of... Fro direction basically means greater is the energy required to generate sound by vibrating their wings coming various... ) if the amplitude basically means greater is the sound, more the amplitude of sound is perceived as if. ) 9 with greater amplitude thereby the sound, amplitude refers to the object which it! Which the pendulum bob is initially released bel, is named after Alexander Graham.. The lower the frequency is measured in seconds these organisms are producing?! Used for producing the sound write any four sources of noise ( 4 ) 9 ears loudness. ( i ) amplitude: it is a form of energy which makes us hear amplitude increases and! Organisms are producing sound second = 60 vibrations per minute past a stationary 8 - Science - Ch -. Books, cbse syllabus and NCERT guidelines is no material to transfer sound waves medium used for producing sound... Hear sounds only within the range of frequencies which are audible to human ears, the of! Notes of Class 8 Science with Answers Pdf free download covering the entire syllabus per.! Are spread apart in a longitudinal wave where the particles are displaced, and if... Organisms are producing sound here with simple step-by-step explanations displaced, and softer the. Produces it t ) ( c ) time period, i.e discussed comprehensively in vibrations! Form of energy.Sound is that form of energy which makes us hear the Nation used for producing sound! The higher is the maximum distance in one side from the mean of... 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