NCERT Solutions for Class 9 Science Chapter 12

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NCERT Solutions for Class 9 Science Chapter 12 - Sound

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NCERT Solutions for Class 9 Chapter 12 Sound are an important material that can help a student to secure good marks in his/her Class 9 exams. Grab the NCERT Solution for Class 9 Sound to get answers to the questions that are likely to come in the exam. Some experienced and knowledgeable teachers have prepared the NCERT Solutions for Class 9 Science Chapter 12 Sound. These solutions can help you to improve your science score. Download NCERT Solution for Class 9 Maths to help you to revise complete syllabus and score more marks in your examinations.

NCERT Solutions for Class 9 Science Chapter 12 Sound part-1
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FAQ (Frequently Asked Questions)

1. What is Sound and How it is Produced? Give an Example.

Ans. Sound is considered as a form of energy that is produced due to the vibration of objects. Vibration refers to the fast to and fro motion of a particular object. It is said that when a body vibrates due to some reason, it causes disturbance in the medium by the particles. For example, when a rubber band is stretched, it vibrates and produces some sound. In this case, the vibrating body can travel through the medium, but the particles do not show any motion and stay still without moving forward. This is how sound is produced.

2. Explain the Working and Application of a Sonar.

Ans. SONAR is an abbreviation of sound, navigation and ranging. SONAR is known as an acoustic device that is generally used for measuring the direction, speed and depth of objects that are present underwater.  For example, submarines use SONAR to investigate different objects underwater.


It functions by producing an ultrasonic sound and it is made to travel under the seawater. This is transmitted by the transducer. When it gets reflected by an object, an echo is produced that is recorded by the detector. Then the signal detected is converted into electrical signals for measurement.