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NCERT Solutions for Class 9

NCERT Solutions for Class 9 Physics Chapter 12 Free PDF Download

NCERT Solutions for Class 9 Physics Chapter 12 – Sound

NCERT Solutions for Class 9 Physics Chapter 12 will help you to ace the unsolved problems in the Class 9 Science book prescribed by the NCERT for all the schools of CBSE. A thorough understanding of the NCERT Solutions for Class 9 Physics Chapter 12 helps you in understanding Physics concepts to the point where they are imprinted in your mind and always at the tip of your tongue. It presents the best alternative and a very interesting way to learn, which helps to enhance your abilities and help to get ready for CBSE Class 9 exams.

NCERT Solutions are prepared by our expert faculties to help you to prepare for your exams in a better way and enhance your score. These NCERT Solutions provide step by step solutions for the questions given in the NCERT textbook as per CBSE Board guidelines and are also prepared according to the exam pattern.

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CBSE Class 9 Physics Chapter 12 – Sound NCERT Solutions

In NCERT Solutions for Class 9 Physics Chapter 12, you will study about production of sound, propagation of sound, sound needs a medium to travel, sound waves are longitudinal waves, characteristics of a sound wave, speed of sound in different media, reflection of sound, echo, reverberation, uses of multiple reflections of sound, sonar, ultrasound applications, structure of human ear.

Sub-topics covered under NCERT Solutions for Class 9 Physics Chapter 12

  • 12.1 – Production of Sound
  • 12.2 – Propagation of Sound
  • 12.2.1 – Sound Needs A Medium To Travel
  • 12.2.2 – Sound Waves Are Longitudinal Waves
  • 12.2.3 – Characteristics Of A Sound Wave
  • 12.2.4 – Speed of Sound In Different Media
  • 12.3 – Reflection Of Sound
  • 12.3.1 – Echo
  • 12.3.2 – Reverberation
  • 12.3.3 – Uses Of Multiple Reflection Of Sound
  • 12.4 – Range Of Hearing
  • 12.5 – Applications Of Ultrasound
  • 12.5.1 – Sonar
  • 12.6 – Structure of Human Ear

NCERT Solutions for Class 9 Physics Chapter 12

In NCERT Solutions for Class 9 Physics Chapter 12 learn about the production of sound, propagation of sound, characteristics of the sound wave, its speed in different mediums, echo, ultrasound and its application, structure of the human ear.

Let us now discuss the subtopics in detail.

12.1 – Production of Sound

In this, you will learn about the production of sound by vibrating any object.

12.2 – Propagation of Sound

In this, you will learn about the wave propagates as compressions & rarefactions in the medium, types of waves such as longitudinal, mechanical, traverse waves.

12.2.1 – Sound Needs A Medium To Travel

In this, you will learn that sound needs a medium to travel means in air, the water you will hear a sound.

12.2.2 – Sound Waves Are Longitudinal Waves

In this, you will understand that the particles oscillate back and forth about their rest position.

12.2.3 – Characteristics Of A Sound Wave

In this, you will study about frequency, amplitude, speed, the pitch of sound waves.

12.2.4 – Speed of Sound In Different Media

In this, you will learn that as the medium changes the speed of sound changes.

12.3 – Reflection Of Sound

In this, you will learn about the reflection of sound.

12.3.1 – Echo

In this, you will learn about echo which is formed by the repeated reflection of sound.

12.3.2 – Reverberation 

In this, you will learn about reverberation means the persistence of sound waves.

12.3.3 – Uses Of Multiple Reflection Of Sound

In this, you will learn that reflection of sound is used in the auditorium, stethoscope, etc.

12.4 – Range Of Hearing

In this, you will learn about infrasonic, ultrasonic sound.

12.5 – Applications Of Ultrasound

In this, you will study that ultrasound is used to clean objects like electronic Components, used to detect cracks in metal blocks, used in ultrasound scanners for getting images of internal organs of the human body, etc.

12.5.1 – Sonar

In this, you will study sonar which measures distance, direction, and speed of an underwater object by using ultrasonic waves.

12.6 – Structure of Human Ear 

In this, you will study the structure of the ear and the mechanism of hearing any sound.

You can download NCERT Solutions for Class 9 Physics Chapter 12 PDF by clicking on the download button below

ncert solutions for class 9 physics chapter 12

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